gtsocial-umbx

assertions.go (58691B)

---

 package assert
 
 import (
 	"bufio"
 	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"math"
 	"os"
 	"reflect"
 	"regexp"
 	"runtime"
 	"runtime/debug"
 	"strings"
 	"time"
 	"unicode"
 	"unicode/utf8"
 
 	"github.com/davecgh/go-spew/spew"
 	"github.com/pmezard/go-difflib/difflib"
 	yaml "gopkg.in/yaml.v3"
 )
 
 //go:generate sh -c "cd ../_codegen && go build && cd - && ../_codegen/_codegen -output-package=assert -template=assertion_format.go.tmpl"
 
 // TestingT is an interface wrapper around *testing.T
 type TestingT interface {
 	Errorf(format string, args ...interface{})
 }
 
 // ComparisonAssertionFunc is a common function prototype when comparing two values.  Can be useful
 // for table driven tests.
 type ComparisonAssertionFunc func(TestingT, interface{}, interface{}, ...interface{}) bool
 
 // ValueAssertionFunc is a common function prototype when validating a single value.  Can be useful
 // for table driven tests.
 type ValueAssertionFunc func(TestingT, interface{}, ...interface{}) bool
 
 // BoolAssertionFunc is a common function prototype when validating a bool value.  Can be useful
 // for table driven tests.
 type BoolAssertionFunc func(TestingT, bool, ...interface{}) bool
 
 // ErrorAssertionFunc is a common function prototype when validating an error value.  Can be useful
 // for table driven tests.
 type ErrorAssertionFunc func(TestingT, error, ...interface{}) bool
 
 // Comparison is a custom function that returns true on success and false on failure
 type Comparison func() (success bool)
 
 /*
 	Helper functions
 */
 
 // ObjectsAreEqual determines if two objects are considered equal.
 //
 // This function does no assertion of any kind.
 func ObjectsAreEqual(expected, actual interface{}) bool {
 	if expected == nil || actual == nil {
 		return expected == actual
 	}
 
 	exp, ok := expected.([]byte)
 	if !ok {
 		return reflect.DeepEqual(expected, actual)
 	}
 
 	act, ok := actual.([]byte)
 	if !ok {
 		return false
 	}
 	if exp == nil || act == nil {
 		return exp == nil && act == nil
 	}
 	return bytes.Equal(exp, act)
 }
 
 // copyExportedFields iterates downward through nested data structures and creates a copy
 // that only contains the exported struct fields.
 func copyExportedFields(expected interface{}) interface{} {
 	if isNil(expected) {
 		return expected
 	}
 
 	expectedType := reflect.TypeOf(expected)
 	expectedKind := expectedType.Kind()
 	expectedValue := reflect.ValueOf(expected)
 
 	switch expectedKind {
 	case reflect.Struct:
 		result := reflect.New(expectedType).Elem()
 		for i := 0; i < expectedType.NumField(); i++ {
 			field := expectedType.Field(i)
 			isExported := field.IsExported()
 			if isExported {
 				fieldValue := expectedValue.Field(i)
 				if isNil(fieldValue) || isNil(fieldValue.Interface()) {
 					continue
 				}
 				newValue := copyExportedFields(fieldValue.Interface())
 				result.Field(i).Set(reflect.ValueOf(newValue))
 			}
 		}
 		return result.Interface()
 
 	case reflect.Ptr:
 		result := reflect.New(expectedType.Elem())
 		unexportedRemoved := copyExportedFields(expectedValue.Elem().Interface())
 		result.Elem().Set(reflect.ValueOf(unexportedRemoved))
 		return result.Interface()
 
 	case reflect.Array, reflect.Slice:
 		result := reflect.MakeSlice(expectedType, expectedValue.Len(), expectedValue.Len())
 		for i := 0; i < expectedValue.Len(); i++ {
 			index := expectedValue.Index(i)
 			if isNil(index) {
 				continue
 			}
 			unexportedRemoved := copyExportedFields(index.Interface())
 			result.Index(i).Set(reflect.ValueOf(unexportedRemoved))
 		}
 		return result.Interface()
 
 	case reflect.Map:
 		result := reflect.MakeMap(expectedType)
 		for _, k := range expectedValue.MapKeys() {
 			index := expectedValue.MapIndex(k)
 			unexportedRemoved := copyExportedFields(index.Interface())
 			result.SetMapIndex(k, reflect.ValueOf(unexportedRemoved))
 		}
 		return result.Interface()
 
 	default:
 		return expected
 	}
 }
 
 // ObjectsExportedFieldsAreEqual determines if the exported (public) fields of two objects are
 // considered equal. This comparison of only exported fields is applied recursively to nested data
 // structures.
 //
 // This function does no assertion of any kind.
 func ObjectsExportedFieldsAreEqual(expected, actual interface{}) bool {
 	expectedCleaned := copyExportedFields(expected)
 	actualCleaned := copyExportedFields(actual)
 	return ObjectsAreEqualValues(expectedCleaned, actualCleaned)
 }
 
 // ObjectsAreEqualValues gets whether two objects are equal, or if their
 // values are equal.
 func ObjectsAreEqualValues(expected, actual interface{}) bool {
 	if ObjectsAreEqual(expected, actual) {
 		return true
 	}
 
 	actualType := reflect.TypeOf(actual)
 	if actualType == nil {
 		return false
 	}
 	expectedValue := reflect.ValueOf(expected)
 	if expectedValue.IsValid() && expectedValue.Type().ConvertibleTo(actualType) {
 		// Attempt comparison after type conversion
 		return reflect.DeepEqual(expectedValue.Convert(actualType).Interface(), actual)
 	}
 
 	return false
 }
 
 /* CallerInfo is necessary because the assert functions use the testing object
 internally, causing it to print the file:line of the assert method, rather than where
 the problem actually occurred in calling code.*/
 
 // CallerInfo returns an array of strings containing the file and line number
 // of each stack frame leading from the current test to the assert call that
 // failed.
 func CallerInfo() []string {
 
 	var pc uintptr
 	var ok bool
 	var file string
 	var line int
 	var name string
 
 	callers := []string{}
 	for i := 0; ; i++ {
 		pc, file, line, ok = runtime.Caller(i)
 		if !ok {
 			// The breaks below failed to terminate the loop, and we ran off the
 			// end of the call stack.
 			break
 		}
 
 		// This is a huge edge case, but it will panic if this is the case, see #180
 		if file == "<autogenerated>" {
 			break
 		}
 
 		f := runtime.FuncForPC(pc)
 		if f == nil {
 			break
 		}
 		name = f.Name()
 
 		// testing.tRunner is the standard library function that calls
 		// tests. Subtests are called directly by tRunner, without going through
 		// the Test/Benchmark/Example function that contains the t.Run calls, so
 		// with subtests we should break when we hit tRunner, without adding it
 		// to the list of callers.
 		if name == "testing.tRunner" {
 			break
 		}
 
 		parts := strings.Split(file, "/")
 		if len(parts) > 1 {
 			filename := parts[len(parts)-1]
 			dir := parts[len(parts)-2]
 			if (dir != "assert" && dir != "mock" && dir != "require") || filename == "mock_test.go" {
 				callers = append(callers, fmt.Sprintf("%s:%d", file, line))
 			}
 		}
 
 		// Drop the package
 		segments := strings.Split(name, ".")
 		name = segments[len(segments)-1]
 		if isTest(name, "Test") ||
 			isTest(name, "Benchmark") ||
 			isTest(name, "Example") {
 			break
 		}
 	}
 
 	return callers
 }
 
 // Stolen from the `go test` tool.
 // isTest tells whether name looks like a test (or benchmark, according to prefix).
 // It is a Test (say) if there is a character after Test that is not a lower-case letter.
 // We don't want TesticularCancer.
 func isTest(name, prefix string) bool {
 	if !strings.HasPrefix(name, prefix) {
 		return false
 	}
 	if len(name) == len(prefix) { // "Test" is ok
 		return true
 	}
 	r, _ := utf8.DecodeRuneInString(name[len(prefix):])
 	return !unicode.IsLower(r)
 }
 
 func messageFromMsgAndArgs(msgAndArgs ...interface{}) string {
 	if len(msgAndArgs) == 0 || msgAndArgs == nil {
 		return ""
 	}
 	if len(msgAndArgs) == 1 {
 		msg := msgAndArgs[0]
 		if msgAsStr, ok := msg.(string); ok {
 			return msgAsStr
 		}
 		return fmt.Sprintf("%+v", msg)
 	}
 	if len(msgAndArgs) > 1 {
 		return fmt.Sprintf(msgAndArgs[0].(string), msgAndArgs[1:]...)
 	}
 	return ""
 }
 
 // Aligns the provided message so that all lines after the first line start at the same location as the first line.
 // Assumes that the first line starts at the correct location (after carriage return, tab, label, spacer and tab).
 // The longestLabelLen parameter specifies the length of the longest label in the output (required becaues this is the
 // basis on which the alignment occurs).
 func indentMessageLines(message string, longestLabelLen int) string {
 	outBuf := new(bytes.Buffer)
 
 	for i, scanner := 0, bufio.NewScanner(strings.NewReader(message)); scanner.Scan(); i++ {
 		// no need to align first line because it starts at the correct location (after the label)
 		if i != 0 {
 			// append alignLen+1 spaces to align with "{{longestLabel}}:" before adding tab
 			outBuf.WriteString("\n\t" + strings.Repeat(" ", longestLabelLen+1) + "\t")
 		}
 		outBuf.WriteString(scanner.Text())
 	}
 
 	return outBuf.String()
 }
 
 type failNower interface {
 	FailNow()
 }
 
 // FailNow fails test
 func FailNow(t TestingT, failureMessage string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	Fail(t, failureMessage, msgAndArgs...)
 
 	// We cannot extend TestingT with FailNow() and
 	// maintain backwards compatibility, so we fallback
 	// to panicking when FailNow is not available in
 	// TestingT.
 	// See issue #263
 
 	if t, ok := t.(failNower); ok {
 		t.FailNow()
 	} else {
 		panic("test failed and t is missing `FailNow()`")
 	}
 	return false
 }
 
 // Fail reports a failure through
 func Fail(t TestingT, failureMessage string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	content := []labeledContent{
 		{"Error Trace", strings.Join(CallerInfo(), "\n\t\t\t")},
 		{"Error", failureMessage},
 	}
 
 	// Add test name if the Go version supports it
 	if n, ok := t.(interface {
 		Name() string
 	}); ok {
 		content = append(content, labeledContent{"Test", n.Name()})
 	}
 
 	message := messageFromMsgAndArgs(msgAndArgs...)
 	if len(message) > 0 {
 		content = append(content, labeledContent{"Messages", message})
 	}
 
 	t.Errorf("\n%s", ""+labeledOutput(content...))
 
 	return false
 }
 
 type labeledContent struct {
 	label   string
 	content string
 }
 
 // labeledOutput returns a string consisting of the provided labeledContent. Each labeled output is appended in the following manner:
 //
 //	\t{{label}}:{{align_spaces}}\t{{content}}\n
 //
 // The initial carriage return is required to undo/erase any padding added by testing.T.Errorf. The "\t{{label}}:" is for the label.
 // If a label is shorter than the longest label provided, padding spaces are added to make all the labels match in length. Once this
 // alignment is achieved, "\t{{content}}\n" is added for the output.
 //
 // If the content of the labeledOutput contains line breaks, the subsequent lines are aligned so that they start at the same location as the first line.
 func labeledOutput(content ...labeledContent) string {
 	longestLabel := 0
 	for _, v := range content {
 		if len(v.label) > longestLabel {
 			longestLabel = len(v.label)
 		}
 	}
 	var output string
 	for _, v := range content {
 		output += "\t" + v.label + ":" + strings.Repeat(" ", longestLabel-len(v.label)) + "\t" + indentMessageLines(v.content, longestLabel) + "\n"
 	}
 	return output
 }
 
 // Implements asserts that an object is implemented by the specified interface.
 //
 //	assert.Implements(t, (*MyInterface)(nil), new(MyObject))
 func Implements(t TestingT, interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	interfaceType := reflect.TypeOf(interfaceObject).Elem()
 
 	if object == nil {
 		return Fail(t, fmt.Sprintf("Cannot check if nil implements %v", interfaceType), msgAndArgs...)
 	}
 	if !reflect.TypeOf(object).Implements(interfaceType) {
 		return Fail(t, fmt.Sprintf("%T must implement %v", object, interfaceType), msgAndArgs...)
 	}
 
 	return true
 }
 
 // IsType asserts that the specified objects are of the same type.
 func IsType(t TestingT, expectedType interface{}, object interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if !ObjectsAreEqual(reflect.TypeOf(object), reflect.TypeOf(expectedType)) {
 		return Fail(t, fmt.Sprintf("Object expected to be of type %v, but was %v", reflect.TypeOf(expectedType), reflect.TypeOf(object)), msgAndArgs...)
 	}
 
 	return true
 }
 
 // Equal asserts that two objects are equal.
 //
 //	assert.Equal(t, 123, 123)
 //
 // Pointer variable equality is determined based on the equality of the
 // referenced values (as opposed to the memory addresses). Function equality
 // cannot be determined and will always fail.
 func Equal(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if err := validateEqualArgs(expected, actual); err != nil {
 		return Fail(t, fmt.Sprintf("Invalid operation: %#v == %#v (%s)",
 			expected, actual, err), msgAndArgs...)
 	}
 
 	if !ObjectsAreEqual(expected, actual) {
 		diff := diff(expected, actual)
 		expected, actual = formatUnequalValues(expected, actual)
 		return Fail(t, fmt.Sprintf("Not equal: \n"+
 			"expected: %s\n"+
 			"actual  : %s%s", expected, actual, diff), msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // validateEqualArgs checks whether provided arguments can be safely used in the
 // Equal/NotEqual functions.
 func validateEqualArgs(expected, actual interface{}) error {
 	if expected == nil && actual == nil {
 		return nil
 	}
 
 	if isFunction(expected) || isFunction(actual) {
 		return errors.New("cannot take func type as argument")
 	}
 	return nil
 }
 
 // Same asserts that two pointers reference the same object.
 //
 //	assert.Same(t, ptr1, ptr2)
 //
 // Both arguments must be pointer variables. Pointer variable sameness is
 // determined based on the equality of both type and value.
 func Same(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if !samePointers(expected, actual) {
 		return Fail(t, fmt.Sprintf("Not same: \n"+
 			"expected: %p %#v\n"+
 			"actual  : %p %#v", expected, expected, actual, actual), msgAndArgs...)
 	}
 
 	return true
 }
 
 // NotSame asserts that two pointers do not reference the same object.
 //
 //	assert.NotSame(t, ptr1, ptr2)
 //
 // Both arguments must be pointer variables. Pointer variable sameness is
 // determined based on the equality of both type and value.
 func NotSame(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if samePointers(expected, actual) {
 		return Fail(t, fmt.Sprintf(
 			"Expected and actual point to the same object: %p %#v",
 			expected, expected), msgAndArgs...)
 	}
 	return true
 }
 
 // samePointers compares two generic interface objects and returns whether
 // they point to the same object
 func samePointers(first, second interface{}) bool {
 	firstPtr, secondPtr := reflect.ValueOf(first), reflect.ValueOf(second)
 	if firstPtr.Kind() != reflect.Ptr || secondPtr.Kind() != reflect.Ptr {
 		return false
 	}
 
 	firstType, secondType := reflect.TypeOf(first), reflect.TypeOf(second)
 	if firstType != secondType {
 		return false
 	}
 
 	// compare pointer addresses
 	return first == second
 }
 
 // formatUnequalValues takes two values of arbitrary types and returns string
 // representations appropriate to be presented to the user.
 //
 // If the values are not of like type, the returned strings will be prefixed
 // with the type name, and the value will be enclosed in parenthesis similar
 // to a type conversion in the Go grammar.
 func formatUnequalValues(expected, actual interface{}) (e string, a string) {
 	if reflect.TypeOf(expected) != reflect.TypeOf(actual) {
 		return fmt.Sprintf("%T(%s)", expected, truncatingFormat(expected)),
 			fmt.Sprintf("%T(%s)", actual, truncatingFormat(actual))
 	}
 	switch expected.(type) {
 	case time.Duration:
 		return fmt.Sprintf("%v", expected), fmt.Sprintf("%v", actual)
 	}
 	return truncatingFormat(expected), truncatingFormat(actual)
 }
 
 // truncatingFormat formats the data and truncates it if it's too long.
 //
 // This helps keep formatted error messages lines from exceeding the
 // bufio.MaxScanTokenSize max line length that the go testing framework imposes.
 func truncatingFormat(data interface{}) string {
 	value := fmt.Sprintf("%#v", data)
 	max := bufio.MaxScanTokenSize - 100 // Give us some space the type info too if needed.
 	if len(value) > max {
 		value = value[0:max] + "<... truncated>"
 	}
 	return value
 }
 
 // EqualValues asserts that two objects are equal or convertable to the same types
 // and equal.
 //
 //	assert.EqualValues(t, uint32(123), int32(123))
 func EqualValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if !ObjectsAreEqualValues(expected, actual) {
 		diff := diff(expected, actual)
 		expected, actual = formatUnequalValues(expected, actual)
 		return Fail(t, fmt.Sprintf("Not equal: \n"+
 			"expected: %s\n"+
 			"actual  : %s%s", expected, actual, diff), msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // EqualExportedValues asserts that the types of two objects are equal and their public
 // fields are also equal. This is useful for comparing structs that have private fields
 // that could potentially differ.
 //
 //	 type S struct {
 //		Exported     	int
 //		notExported   	int
 //	 }
 //	 assert.EqualExportedValues(t, S{1, 2}, S{1, 3}) => true
 //	 assert.EqualExportedValues(t, S{1, 2}, S{2, 3}) => false
 func EqualExportedValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	aType := reflect.TypeOf(expected)
 	bType := reflect.TypeOf(actual)
 
 	if aType != bType {
 		return Fail(t, fmt.Sprintf("Types expected to match exactly\n\t%v != %v", aType, bType), msgAndArgs...)
 	}
 
 	if aType.Kind() != reflect.Struct {
 		return Fail(t, fmt.Sprintf("Types expected to both be struct \n\t%v != %v", aType.Kind(), reflect.Struct), msgAndArgs...)
 	}
 
 	if bType.Kind() != reflect.Struct {
 		return Fail(t, fmt.Sprintf("Types expected to both be struct \n\t%v != %v", bType.Kind(), reflect.Struct), msgAndArgs...)
 	}
 
 	expected = copyExportedFields(expected)
 	actual = copyExportedFields(actual)
 
 	if !ObjectsAreEqualValues(expected, actual) {
 		diff := diff(expected, actual)
 		expected, actual = formatUnequalValues(expected, actual)
 		return Fail(t, fmt.Sprintf("Not equal (comparing only exported fields): \n"+
 			"expected: %s\n"+
 			"actual  : %s%s", expected, actual, diff), msgAndArgs...)
 	}
 
 	return true
 }
 
 // Exactly asserts that two objects are equal in value and type.
 //
 //	assert.Exactly(t, int32(123), int64(123))
 func Exactly(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	aType := reflect.TypeOf(expected)
 	bType := reflect.TypeOf(actual)
 
 	if aType != bType {
 		return Fail(t, fmt.Sprintf("Types expected to match exactly\n\t%v != %v", aType, bType), msgAndArgs...)
 	}
 
 	return Equal(t, expected, actual, msgAndArgs...)
 
 }
 
 // NotNil asserts that the specified object is not nil.
 //
 //	assert.NotNil(t, err)
 func NotNil(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
 	if !isNil(object) {
 		return true
 	}
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	return Fail(t, "Expected value not to be nil.", msgAndArgs...)
 }
 
 // containsKind checks if a specified kind in the slice of kinds.
 func containsKind(kinds []reflect.Kind, kind reflect.Kind) bool {
 	for i := 0; i < len(kinds); i++ {
 		if kind == kinds[i] {
 			return true
 		}
 	}
 
 	return false
 }
 
 // isNil checks if a specified object is nil or not, without Failing.
 func isNil(object interface{}) bool {
 	if object == nil {
 		return true
 	}
 
 	value := reflect.ValueOf(object)
 	kind := value.Kind()
 	isNilableKind := containsKind(
 		[]reflect.Kind{
 			reflect.Chan, reflect.Func,
 			reflect.Interface, reflect.Map,
 			reflect.Ptr, reflect.Slice, reflect.UnsafePointer},
 		kind)
 
 	if isNilableKind && value.IsNil() {
 		return true
 	}
 
 	return false
 }
 
 // Nil asserts that the specified object is nil.
 //
 //	assert.Nil(t, err)
 func Nil(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
 	if isNil(object) {
 		return true
 	}
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	return Fail(t, fmt.Sprintf("Expected nil, but got: %#v", object), msgAndArgs...)
 }
 
 // isEmpty gets whether the specified object is considered empty or not.
 func isEmpty(object interface{}) bool {
 
 	// get nil case out of the way
 	if object == nil {
 		return true
 	}
 
 	objValue := reflect.ValueOf(object)
 
 	switch objValue.Kind() {
 	// collection types are empty when they have no element
 	case reflect.Chan, reflect.Map, reflect.Slice:
 		return objValue.Len() == 0
 	// pointers are empty if nil or if the value they point to is empty
 	case reflect.Ptr:
 		if objValue.IsNil() {
 			return true
 		}
 		deref := objValue.Elem().Interface()
 		return isEmpty(deref)
 	// for all other types, compare against the zero value
 	// array types are empty when they match their zero-initialized state
 	default:
 		zero := reflect.Zero(objValue.Type())
 		return reflect.DeepEqual(object, zero.Interface())
 	}
 }
 
 // Empty asserts that the specified object is empty.  I.e. nil, "", false, 0 or either
 // a slice or a channel with len == 0.
 //
 //	assert.Empty(t, obj)
 func Empty(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
 	pass := isEmpty(object)
 	if !pass {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		Fail(t, fmt.Sprintf("Should be empty, but was %v", object), msgAndArgs...)
 	}
 
 	return pass
 
 }
 
 // NotEmpty asserts that the specified object is NOT empty.  I.e. not nil, "", false, 0 or either
 // a slice or a channel with len == 0.
 //
 //	if assert.NotEmpty(t, obj) {
 //	  assert.Equal(t, "two", obj[1])
 //	}
 func NotEmpty(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
 	pass := !isEmpty(object)
 	if !pass {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		Fail(t, fmt.Sprintf("Should NOT be empty, but was %v", object), msgAndArgs...)
 	}
 
 	return pass
 
 }
 
 // getLen try to get length of object.
 // return (false, 0) if impossible.
 func getLen(x interface{}) (ok bool, length int) {
 	v := reflect.ValueOf(x)
 	defer func() {
 		if e := recover(); e != nil {
 			ok = false
 		}
 	}()
 	return true, v.Len()
 }
 
 // Len asserts that the specified object has specific length.
 // Len also fails if the object has a type that len() not accept.
 //
 //	assert.Len(t, mySlice, 3)
 func Len(t TestingT, object interface{}, length int, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	ok, l := getLen(object)
 	if !ok {
 		return Fail(t, fmt.Sprintf("\"%s\" could not be applied builtin len()", object), msgAndArgs...)
 	}
 
 	if l != length {
 		return Fail(t, fmt.Sprintf("\"%s\" should have %d item(s), but has %d", object, length, l), msgAndArgs...)
 	}
 	return true
 }
 
 // True asserts that the specified value is true.
 //
 //	assert.True(t, myBool)
 func True(t TestingT, value bool, msgAndArgs ...interface{}) bool {
 	if !value {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		return Fail(t, "Should be true", msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // False asserts that the specified value is false.
 //
 //	assert.False(t, myBool)
 func False(t TestingT, value bool, msgAndArgs ...interface{}) bool {
 	if value {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		return Fail(t, "Should be false", msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // NotEqual asserts that the specified values are NOT equal.
 //
 //	assert.NotEqual(t, obj1, obj2)
 //
 // Pointer variable equality is determined based on the equality of the
 // referenced values (as opposed to the memory addresses).
 func NotEqual(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if err := validateEqualArgs(expected, actual); err != nil {
 		return Fail(t, fmt.Sprintf("Invalid operation: %#v != %#v (%s)",
 			expected, actual, err), msgAndArgs...)
 	}
 
 	if ObjectsAreEqual(expected, actual) {
 		return Fail(t, fmt.Sprintf("Should not be: %#v\n", actual), msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // NotEqualValues asserts that two objects are not equal even when converted to the same type
 //
 //	assert.NotEqualValues(t, obj1, obj2)
 func NotEqualValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if ObjectsAreEqualValues(expected, actual) {
 		return Fail(t, fmt.Sprintf("Should not be: %#v\n", actual), msgAndArgs...)
 	}
 
 	return true
 }
 
 // containsElement try loop over the list check if the list includes the element.
 // return (false, false) if impossible.
 // return (true, false) if element was not found.
 // return (true, true) if element was found.
 func containsElement(list interface{}, element interface{}) (ok, found bool) {
 
 	listValue := reflect.ValueOf(list)
 	listType := reflect.TypeOf(list)
 	if listType == nil {
 		return false, false
 	}
 	listKind := listType.Kind()
 	defer func() {
 		if e := recover(); e != nil {
 			ok = false
 			found = false
 		}
 	}()
 
 	if listKind == reflect.String {
 		elementValue := reflect.ValueOf(element)
 		return true, strings.Contains(listValue.String(), elementValue.String())
 	}
 
 	if listKind == reflect.Map {
 		mapKeys := listValue.MapKeys()
 		for i := 0; i < len(mapKeys); i++ {
 			if ObjectsAreEqual(mapKeys[i].Interface(), element) {
 				return true, true
 			}
 		}
 		return true, false
 	}
 
 	for i := 0; i < listValue.Len(); i++ {
 		if ObjectsAreEqual(listValue.Index(i).Interface(), element) {
 			return true, true
 		}
 	}
 	return true, false
 
 }
 
 // Contains asserts that the specified string, list(array, slice...) or map contains the
 // specified substring or element.
 //
 //	assert.Contains(t, "Hello World", "World")
 //	assert.Contains(t, ["Hello", "World"], "World")
 //	assert.Contains(t, {"Hello": "World"}, "Hello")
 func Contains(t TestingT, s, contains interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	ok, found := containsElement(s, contains)
 	if !ok {
 		return Fail(t, fmt.Sprintf("%#v could not be applied builtin len()", s), msgAndArgs...)
 	}
 	if !found {
 		return Fail(t, fmt.Sprintf("%#v does not contain %#v", s, contains), msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // NotContains asserts that the specified string, list(array, slice...) or map does NOT contain the
 // specified substring or element.
 //
 //	assert.NotContains(t, "Hello World", "Earth")
 //	assert.NotContains(t, ["Hello", "World"], "Earth")
 //	assert.NotContains(t, {"Hello": "World"}, "Earth")
 func NotContains(t TestingT, s, contains interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	ok, found := containsElement(s, contains)
 	if !ok {
 		return Fail(t, fmt.Sprintf("%#v could not be applied builtin len()", s), msgAndArgs...)
 	}
 	if found {
 		return Fail(t, fmt.Sprintf("%#v should not contain %#v", s, contains), msgAndArgs...)
 	}
 
 	return true
 
 }
 
 // Subset asserts that the specified list(array, slice...) contains all
 // elements given in the specified subset(array, slice...).
 //
 //	assert.Subset(t, [1, 2, 3], [1, 2], "But [1, 2, 3] does contain [1, 2]")
 func Subset(t TestingT, list, subset interface{}, msgAndArgs ...interface{}) (ok bool) {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if subset == nil {
 		return true // we consider nil to be equal to the nil set
 	}
 
 	listKind := reflect.TypeOf(list).Kind()
 	if listKind != reflect.Array && listKind != reflect.Slice && listKind != reflect.Map {
 		return Fail(t, fmt.Sprintf("%q has an unsupported type %s", list, listKind), msgAndArgs...)
 	}
 
 	subsetKind := reflect.TypeOf(subset).Kind()
 	if subsetKind != reflect.Array && subsetKind != reflect.Slice && listKind != reflect.Map {
 		return Fail(t, fmt.Sprintf("%q has an unsupported type %s", subset, subsetKind), msgAndArgs...)
 	}
 
 	if subsetKind == reflect.Map && listKind == reflect.Map {
 		subsetMap := reflect.ValueOf(subset)
 		actualMap := reflect.ValueOf(list)
 
 		for _, k := range subsetMap.MapKeys() {
 			ev := subsetMap.MapIndex(k)
 			av := actualMap.MapIndex(k)
 
 			if !av.IsValid() {
 				return Fail(t, fmt.Sprintf("%#v does not contain %#v", list, subset), msgAndArgs...)
 			}
 			if !ObjectsAreEqual(ev.Interface(), av.Interface()) {
 				return Fail(t, fmt.Sprintf("%#v does not contain %#v", list, subset), msgAndArgs...)
 			}
 		}
 
 		return true
 	}
 
 	subsetList := reflect.ValueOf(subset)
 	for i := 0; i < subsetList.Len(); i++ {
 		element := subsetList.Index(i).Interface()
 		ok, found := containsElement(list, element)
 		if !ok {
 			return Fail(t, fmt.Sprintf("%#v could not be applied builtin len()", list), msgAndArgs...)
 		}
 		if !found {
 			return Fail(t, fmt.Sprintf("%#v does not contain %#v", list, element), msgAndArgs...)
 		}
 	}
 
 	return true
 }
 
 // NotSubset asserts that the specified list(array, slice...) contains not all
 // elements given in the specified subset(array, slice...).
 //
 //	assert.NotSubset(t, [1, 3, 4], [1, 2], "But [1, 3, 4] does not contain [1, 2]")
 func NotSubset(t TestingT, list, subset interface{}, msgAndArgs ...interface{}) (ok bool) {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if subset == nil {
 		return Fail(t, "nil is the empty set which is a subset of every set", msgAndArgs...)
 	}
 
 	listKind := reflect.TypeOf(list).Kind()
 	if listKind != reflect.Array && listKind != reflect.Slice && listKind != reflect.Map {
 		return Fail(t, fmt.Sprintf("%q has an unsupported type %s", list, listKind), msgAndArgs...)
 	}
 
 	subsetKind := reflect.TypeOf(subset).Kind()
 	if subsetKind != reflect.Array && subsetKind != reflect.Slice && listKind != reflect.Map {
 		return Fail(t, fmt.Sprintf("%q has an unsupported type %s", subset, subsetKind), msgAndArgs...)
 	}
 
 	if subsetKind == reflect.Map && listKind == reflect.Map {
 		subsetMap := reflect.ValueOf(subset)
 		actualMap := reflect.ValueOf(list)
 
 		for _, k := range subsetMap.MapKeys() {
 			ev := subsetMap.MapIndex(k)
 			av := actualMap.MapIndex(k)
 
 			if !av.IsValid() {
 				return true
 			}
 			if !ObjectsAreEqual(ev.Interface(), av.Interface()) {
 				return true
 			}
 		}
 
 		return Fail(t, fmt.Sprintf("%q is a subset of %q", subset, list), msgAndArgs...)
 	}
 
 	subsetList := reflect.ValueOf(subset)
 	for i := 0; i < subsetList.Len(); i++ {
 		element := subsetList.Index(i).Interface()
 		ok, found := containsElement(list, element)
 		if !ok {
 			return Fail(t, fmt.Sprintf("\"%s\" could not be applied builtin len()", list), msgAndArgs...)
 		}
 		if !found {
 			return true
 		}
 	}
 
 	return Fail(t, fmt.Sprintf("%q is a subset of %q", subset, list), msgAndArgs...)
 }
 
 // ElementsMatch asserts that the specified listA(array, slice...) is equal to specified
 // listB(array, slice...) ignoring the order of the elements. If there are duplicate elements,
 // the number of appearances of each of them in both lists should match.
 //
 // assert.ElementsMatch(t, [1, 3, 2, 3], [1, 3, 3, 2])
 func ElementsMatch(t TestingT, listA, listB interface{}, msgAndArgs ...interface{}) (ok bool) {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if isEmpty(listA) && isEmpty(listB) {
 		return true
 	}
 
 	if !isList(t, listA, msgAndArgs...) || !isList(t, listB, msgAndArgs...) {
 		return false
 	}
 
 	extraA, extraB := diffLists(listA, listB)
 
 	if len(extraA) == 0 && len(extraB) == 0 {
 		return true
 	}
 
 	return Fail(t, formatListDiff(listA, listB, extraA, extraB), msgAndArgs...)
 }
 
 // isList checks that the provided value is array or slice.
 func isList(t TestingT, list interface{}, msgAndArgs ...interface{}) (ok bool) {
 	kind := reflect.TypeOf(list).Kind()
 	if kind != reflect.Array && kind != reflect.Slice {
 		return Fail(t, fmt.Sprintf("%q has an unsupported type %s, expecting array or slice", list, kind),
 			msgAndArgs...)
 	}
 	return true
 }
 
 // diffLists diffs two arrays/slices and returns slices of elements that are only in A and only in B.
 // If some element is present multiple times, each instance is counted separately (e.g. if something is 2x in A and
 // 5x in B, it will be 0x in extraA and 3x in extraB). The order of items in both lists is ignored.
 func diffLists(listA, listB interface{}) (extraA, extraB []interface{}) {
 	aValue := reflect.ValueOf(listA)
 	bValue := reflect.ValueOf(listB)
 
 	aLen := aValue.Len()
 	bLen := bValue.Len()
 
 	// Mark indexes in bValue that we already used
 	visited := make([]bool, bLen)
 	for i := 0; i < aLen; i++ {
 		element := aValue.Index(i).Interface()
 		found := false
 		for j := 0; j < bLen; j++ {
 			if visited[j] {
 				continue
 			}
 			if ObjectsAreEqual(bValue.Index(j).Interface(), element) {
 				visited[j] = true
 				found = true
 				break
 			}
 		}
 		if !found {
 			extraA = append(extraA, element)
 		}
 	}
 
 	for j := 0; j < bLen; j++ {
 		if visited[j] {
 			continue
 		}
 		extraB = append(extraB, bValue.Index(j).Interface())
 	}
 
 	return
 }
 
 func formatListDiff(listA, listB interface{}, extraA, extraB []interface{}) string {
 	var msg bytes.Buffer
 
 	msg.WriteString("elements differ")
 	if len(extraA) > 0 {
 		msg.WriteString("\n\nextra elements in list A:\n")
 		msg.WriteString(spewConfig.Sdump(extraA))
 	}
 	if len(extraB) > 0 {
 		msg.WriteString("\n\nextra elements in list B:\n")
 		msg.WriteString(spewConfig.Sdump(extraB))
 	}
 	msg.WriteString("\n\nlistA:\n")
 	msg.WriteString(spewConfig.Sdump(listA))
 	msg.WriteString("\n\nlistB:\n")
 	msg.WriteString(spewConfig.Sdump(listB))
 
 	return msg.String()
 }
 
 // Condition uses a Comparison to assert a complex condition.
 func Condition(t TestingT, comp Comparison, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	result := comp()
 	if !result {
 		Fail(t, "Condition failed!", msgAndArgs...)
 	}
 	return result
 }
 
 // PanicTestFunc defines a func that should be passed to the assert.Panics and assert.NotPanics
 // methods, and represents a simple func that takes no arguments, and returns nothing.
 type PanicTestFunc func()
 
 // didPanic returns true if the function passed to it panics. Otherwise, it returns false.
 func didPanic(f PanicTestFunc) (didPanic bool, message interface{}, stack string) {
 	didPanic = true
 
 	defer func() {
 		message = recover()
 		if didPanic {
 			stack = string(debug.Stack())
 		}
 	}()
 
 	// call the target function
 	f()
 	didPanic = false
 
 	return
 }
 
 // Panics asserts that the code inside the specified PanicTestFunc panics.
 //
 //	assert.Panics(t, func(){ GoCrazy() })
 func Panics(t TestingT, f PanicTestFunc, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if funcDidPanic, panicValue, _ := didPanic(f); !funcDidPanic {
 		return Fail(t, fmt.Sprintf("func %#v should panic\n\tPanic value:\t%#v", f, panicValue), msgAndArgs...)
 	}
 
 	return true
 }
 
 // PanicsWithValue asserts that the code inside the specified PanicTestFunc panics, and that
 // the recovered panic value equals the expected panic value.
 //
 //	assert.PanicsWithValue(t, "crazy error", func(){ GoCrazy() })
 func PanicsWithValue(t TestingT, expected interface{}, f PanicTestFunc, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	funcDidPanic, panicValue, panickedStack := didPanic(f)
 	if !funcDidPanic {
 		return Fail(t, fmt.Sprintf("func %#v should panic\n\tPanic value:\t%#v", f, panicValue), msgAndArgs...)
 	}
 	if panicValue != expected {
 		return Fail(t, fmt.Sprintf("func %#v should panic with value:\t%#v\n\tPanic value:\t%#v\n\tPanic stack:\t%s", f, expected, panicValue, panickedStack), msgAndArgs...)
 	}
 
 	return true
 }
 
 // PanicsWithError asserts that the code inside the specified PanicTestFunc
 // panics, and that the recovered panic value is an error that satisfies the
 // EqualError comparison.
 //
 //	assert.PanicsWithError(t, "crazy error", func(){ GoCrazy() })
 func PanicsWithError(t TestingT, errString string, f PanicTestFunc, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	funcDidPanic, panicValue, panickedStack := didPanic(f)
 	if !funcDidPanic {
 		return Fail(t, fmt.Sprintf("func %#v should panic\n\tPanic value:\t%#v", f, panicValue), msgAndArgs...)
 	}
 	panicErr, ok := panicValue.(error)
 	if !ok || panicErr.Error() != errString {
 		return Fail(t, fmt.Sprintf("func %#v should panic with error message:\t%#v\n\tPanic value:\t%#v\n\tPanic stack:\t%s", f, errString, panicValue, panickedStack), msgAndArgs...)
 	}
 
 	return true
 }
 
 // NotPanics asserts that the code inside the specified PanicTestFunc does NOT panic.
 //
 //	assert.NotPanics(t, func(){ RemainCalm() })
 func NotPanics(t TestingT, f PanicTestFunc, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if funcDidPanic, panicValue, panickedStack := didPanic(f); funcDidPanic {
 		return Fail(t, fmt.Sprintf("func %#v should not panic\n\tPanic value:\t%v\n\tPanic stack:\t%s", f, panicValue, panickedStack), msgAndArgs...)
 	}
 
 	return true
 }
 
 // WithinDuration asserts that the two times are within duration delta of each other.
 //
 //	assert.WithinDuration(t, time.Now(), time.Now(), 10*time.Second)
 func WithinDuration(t TestingT, expected, actual time.Time, delta time.Duration, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	dt := expected.Sub(actual)
 	if dt < -delta || dt > delta {
 		return Fail(t, fmt.Sprintf("Max difference between %v and %v allowed is %v, but difference was %v", expected, actual, delta, dt), msgAndArgs...)
 	}
 
 	return true
 }
 
 // WithinRange asserts that a time is within a time range (inclusive).
 //
 //	assert.WithinRange(t, time.Now(), time.Now().Add(-time.Second), time.Now().Add(time.Second))
 func WithinRange(t TestingT, actual, start, end time.Time, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	if end.Before(start) {
 		return Fail(t, "Start should be before end", msgAndArgs...)
 	}
 
 	if actual.Before(start) {
 		return Fail(t, fmt.Sprintf("Time %v expected to be in time range %v to %v, but is before the range", actual, start, end), msgAndArgs...)
 	} else if actual.After(end) {
 		return Fail(t, fmt.Sprintf("Time %v expected to be in time range %v to %v, but is after the range", actual, start, end), msgAndArgs...)
 	}
 
 	return true
 }
 
 func toFloat(x interface{}) (float64, bool) {
 	var xf float64
 	xok := true
 
 	switch xn := x.(type) {
 	case uint:
 		xf = float64(xn)
 	case uint8:
 		xf = float64(xn)
 	case uint16:
 		xf = float64(xn)
 	case uint32:
 		xf = float64(xn)
 	case uint64:
 		xf = float64(xn)
 	case int:
 		xf = float64(xn)
 	case int8:
 		xf = float64(xn)
 	case int16:
 		xf = float64(xn)
 	case int32:
 		xf = float64(xn)
 	case int64:
 		xf = float64(xn)
 	case float32:
 		xf = float64(xn)
 	case float64:
 		xf = xn
 	case time.Duration:
 		xf = float64(xn)
 	default:
 		xok = false
 	}
 
 	return xf, xok
 }
 
 // InDelta asserts that the two numerals are within delta of each other.
 //
 //	assert.InDelta(t, math.Pi, 22/7.0, 0.01)
 func InDelta(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	af, aok := toFloat(expected)
 	bf, bok := toFloat(actual)
 
 	if !aok || !bok {
 		return Fail(t, "Parameters must be numerical", msgAndArgs...)
 	}
 
 	if math.IsNaN(af) && math.IsNaN(bf) {
 		return true
 	}
 
 	if math.IsNaN(af) {
 		return Fail(t, "Expected must not be NaN", msgAndArgs...)
 	}
 
 	if math.IsNaN(bf) {
 		return Fail(t, fmt.Sprintf("Expected %v with delta %v, but was NaN", expected, delta), msgAndArgs...)
 	}
 
 	dt := af - bf
 	if dt < -delta || dt > delta {
 		return Fail(t, fmt.Sprintf("Max difference between %v and %v allowed is %v, but difference was %v", expected, actual, delta, dt), msgAndArgs...)
 	}
 
 	return true
 }
 
 // InDeltaSlice is the same as InDelta, except it compares two slices.
 func InDeltaSlice(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if expected == nil || actual == nil ||
 		reflect.TypeOf(actual).Kind() != reflect.Slice ||
 		reflect.TypeOf(expected).Kind() != reflect.Slice {
 		return Fail(t, "Parameters must be slice", msgAndArgs...)
 	}
 
 	actualSlice := reflect.ValueOf(actual)
 	expectedSlice := reflect.ValueOf(expected)
 
 	for i := 0; i < actualSlice.Len(); i++ {
 		result := InDelta(t, actualSlice.Index(i).Interface(), expectedSlice.Index(i).Interface(), delta, msgAndArgs...)
 		if !result {
 			return result
 		}
 	}
 
 	return true
 }
 
 // InDeltaMapValues is the same as InDelta, but it compares all values between two maps. Both maps must have exactly the same keys.
 func InDeltaMapValues(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if expected == nil || actual == nil ||
 		reflect.TypeOf(actual).Kind() != reflect.Map ||
 		reflect.TypeOf(expected).Kind() != reflect.Map {
 		return Fail(t, "Arguments must be maps", msgAndArgs...)
 	}
 
 	expectedMap := reflect.ValueOf(expected)
 	actualMap := reflect.ValueOf(actual)
 
 	if expectedMap.Len() != actualMap.Len() {
 		return Fail(t, "Arguments must have the same number of keys", msgAndArgs...)
 	}
 
 	for _, k := range expectedMap.MapKeys() {
 		ev := expectedMap.MapIndex(k)
 		av := actualMap.MapIndex(k)
 
 		if !ev.IsValid() {
 			return Fail(t, fmt.Sprintf("missing key %q in expected map", k), msgAndArgs...)
 		}
 
 		if !av.IsValid() {
 			return Fail(t, fmt.Sprintf("missing key %q in actual map", k), msgAndArgs...)
 		}
 
 		if !InDelta(
 			t,
 			ev.Interface(),
 			av.Interface(),
 			delta,
 			msgAndArgs...,
 		) {
 			return false
 		}
 	}
 
 	return true
 }
 
 func calcRelativeError(expected, actual interface{}) (float64, error) {
 	af, aok := toFloat(expected)
 	bf, bok := toFloat(actual)
 	if !aok || !bok {
 		return 0, fmt.Errorf("Parameters must be numerical")
 	}
 	if math.IsNaN(af) && math.IsNaN(bf) {
 		return 0, nil
 	}
 	if math.IsNaN(af) {
 		return 0, errors.New("expected value must not be NaN")
 	}
 	if af == 0 {
 		return 0, fmt.Errorf("expected value must have a value other than zero to calculate the relative error")
 	}
 	if math.IsNaN(bf) {
 		return 0, errors.New("actual value must not be NaN")
 	}
 
 	return math.Abs(af-bf) / math.Abs(af), nil
 }
 
 // InEpsilon asserts that expected and actual have a relative error less than epsilon
 func InEpsilon(t TestingT, expected, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if math.IsNaN(epsilon) {
 		return Fail(t, "epsilon must not be NaN")
 	}
 	actualEpsilon, err := calcRelativeError(expected, actual)
 	if err != nil {
 		return Fail(t, err.Error(), msgAndArgs...)
 	}
 	if actualEpsilon > epsilon {
 		return Fail(t, fmt.Sprintf("Relative error is too high: %#v (expected)\n"+
 			"        < %#v (actual)", epsilon, actualEpsilon), msgAndArgs...)
 	}
 
 	return true
 }
 
 // InEpsilonSlice is the same as InEpsilon, except it compares each value from two slices.
 func InEpsilonSlice(t TestingT, expected, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if expected == nil || actual == nil ||
 		reflect.TypeOf(actual).Kind() != reflect.Slice ||
 		reflect.TypeOf(expected).Kind() != reflect.Slice {
 		return Fail(t, "Parameters must be slice", msgAndArgs...)
 	}
 
 	actualSlice := reflect.ValueOf(actual)
 	expectedSlice := reflect.ValueOf(expected)
 
 	for i := 0; i < actualSlice.Len(); i++ {
 		result := InEpsilon(t, actualSlice.Index(i).Interface(), expectedSlice.Index(i).Interface(), epsilon)
 		if !result {
 			return result
 		}
 	}
 
 	return true
 }
 
 /*
 	Errors
 */
 
 // NoError asserts that a function returned no error (i.e. `nil`).
 //
 //	  actualObj, err := SomeFunction()
 //	  if assert.NoError(t, err) {
 //		   assert.Equal(t, expectedObj, actualObj)
 //	  }
 func NoError(t TestingT, err error, msgAndArgs ...interface{}) bool {
 	if err != nil {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		return Fail(t, fmt.Sprintf("Received unexpected error:\n%+v", err), msgAndArgs...)
 	}
 
 	return true
 }
 
 // Error asserts that a function returned an error (i.e. not `nil`).
 //
 //	  actualObj, err := SomeFunction()
 //	  if assert.Error(t, err) {
 //		   assert.Equal(t, expectedError, err)
 //	  }
 func Error(t TestingT, err error, msgAndArgs ...interface{}) bool {
 	if err == nil {
 		if h, ok := t.(tHelper); ok {
 			h.Helper()
 		}
 		return Fail(t, "An error is expected but got nil.", msgAndArgs...)
 	}
 
 	return true
 }
 
 // EqualError asserts that a function returned an error (i.e. not `nil`)
 // and that it is equal to the provided error.
 //
 //	actualObj, err := SomeFunction()
 //	assert.EqualError(t, err,  expectedErrorString)
 func EqualError(t TestingT, theError error, errString string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if !Error(t, theError, msgAndArgs...) {
 		return false
 	}
 	expected := errString
 	actual := theError.Error()
 	// don't need to use deep equals here, we know they are both strings
 	if expected != actual {
 		return Fail(t, fmt.Sprintf("Error message not equal:\n"+
 			"expected: %q\n"+
 			"actual  : %q", expected, actual), msgAndArgs...)
 	}
 	return true
 }
 
 // ErrorContains asserts that a function returned an error (i.e. not `nil`)
 // and that the error contains the specified substring.
 //
 //	actualObj, err := SomeFunction()
 //	assert.ErrorContains(t, err,  expectedErrorSubString)
 func ErrorContains(t TestingT, theError error, contains string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if !Error(t, theError, msgAndArgs...) {
 		return false
 	}
 
 	actual := theError.Error()
 	if !strings.Contains(actual, contains) {
 		return Fail(t, fmt.Sprintf("Error %#v does not contain %#v", actual, contains), msgAndArgs...)
 	}
 
 	return true
 }
 
 // matchRegexp return true if a specified regexp matches a string.
 func matchRegexp(rx interface{}, str interface{}) bool {
 
 	var r *regexp.Regexp
 	if rr, ok := rx.(*regexp.Regexp); ok {
 		r = rr
 	} else {
 		r = regexp.MustCompile(fmt.Sprint(rx))
 	}
 
 	return (r.FindStringIndex(fmt.Sprint(str)) != nil)
 
 }
 
 // Regexp asserts that a specified regexp matches a string.
 //
 //	assert.Regexp(t, regexp.MustCompile("start"), "it's starting")
 //	assert.Regexp(t, "start...$", "it's not starting")
 func Regexp(t TestingT, rx interface{}, str interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	match := matchRegexp(rx, str)
 
 	if !match {
 		Fail(t, fmt.Sprintf("Expect \"%v\" to match \"%v\"", str, rx), msgAndArgs...)
 	}
 
 	return match
 }
 
 // NotRegexp asserts that a specified regexp does not match a string.
 //
 //	assert.NotRegexp(t, regexp.MustCompile("starts"), "it's starting")
 //	assert.NotRegexp(t, "^start", "it's not starting")
 func NotRegexp(t TestingT, rx interface{}, str interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	match := matchRegexp(rx, str)
 
 	if match {
 		Fail(t, fmt.Sprintf("Expect \"%v\" to NOT match \"%v\"", str, rx), msgAndArgs...)
 	}
 
 	return !match
 
 }
 
 // Zero asserts that i is the zero value for its type.
 func Zero(t TestingT, i interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if i != nil && !reflect.DeepEqual(i, reflect.Zero(reflect.TypeOf(i)).Interface()) {
 		return Fail(t, fmt.Sprintf("Should be zero, but was %v", i), msgAndArgs...)
 	}
 	return true
 }
 
 // NotZero asserts that i is not the zero value for its type.
 func NotZero(t TestingT, i interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if i == nil || reflect.DeepEqual(i, reflect.Zero(reflect.TypeOf(i)).Interface()) {
 		return Fail(t, fmt.Sprintf("Should not be zero, but was %v", i), msgAndArgs...)
 	}
 	return true
 }
 
 // FileExists checks whether a file exists in the given path. It also fails if
 // the path points to a directory or there is an error when trying to check the file.
 func FileExists(t TestingT, path string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	info, err := os.Lstat(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			return Fail(t, fmt.Sprintf("unable to find file %q", path), msgAndArgs...)
 		}
 		return Fail(t, fmt.Sprintf("error when running os.Lstat(%q): %s", path, err), msgAndArgs...)
 	}
 	if info.IsDir() {
 		return Fail(t, fmt.Sprintf("%q is a directory", path), msgAndArgs...)
 	}
 	return true
 }
 
 // NoFileExists checks whether a file does not exist in a given path. It fails
 // if the path points to an existing _file_ only.
 func NoFileExists(t TestingT, path string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	info, err := os.Lstat(path)
 	if err != nil {
 		return true
 	}
 	if info.IsDir() {
 		return true
 	}
 	return Fail(t, fmt.Sprintf("file %q exists", path), msgAndArgs...)
 }
 
 // DirExists checks whether a directory exists in the given path. It also fails
 // if the path is a file rather a directory or there is an error checking whether it exists.
 func DirExists(t TestingT, path string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	info, err := os.Lstat(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			return Fail(t, fmt.Sprintf("unable to find file %q", path), msgAndArgs...)
 		}
 		return Fail(t, fmt.Sprintf("error when running os.Lstat(%q): %s", path, err), msgAndArgs...)
 	}
 	if !info.IsDir() {
 		return Fail(t, fmt.Sprintf("%q is a file", path), msgAndArgs...)
 	}
 	return true
 }
 
 // NoDirExists checks whether a directory does not exist in the given path.
 // It fails if the path points to an existing _directory_ only.
 func NoDirExists(t TestingT, path string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	info, err := os.Lstat(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			return true
 		}
 		return true
 	}
 	if !info.IsDir() {
 		return true
 	}
 	return Fail(t, fmt.Sprintf("directory %q exists", path), msgAndArgs...)
 }
 
 // JSONEq asserts that two JSON strings are equivalent.
 //
 //	assert.JSONEq(t, `{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`)
 func JSONEq(t TestingT, expected string, actual string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	var expectedJSONAsInterface, actualJSONAsInterface interface{}
 
 	if err := json.Unmarshal([]byte(expected), &expectedJSONAsInterface); err != nil {
 		return Fail(t, fmt.Sprintf("Expected value ('%s') is not valid json.\nJSON parsing error: '%s'", expected, err.Error()), msgAndArgs...)
 	}
 
 	if err := json.Unmarshal([]byte(actual), &actualJSONAsInterface); err != nil {
 		return Fail(t, fmt.Sprintf("Input ('%s') needs to be valid json.\nJSON parsing error: '%s'", actual, err.Error()), msgAndArgs...)
 	}
 
 	return Equal(t, expectedJSONAsInterface, actualJSONAsInterface, msgAndArgs...)
 }
 
 // YAMLEq asserts that two YAML strings are equivalent.
 func YAMLEq(t TestingT, expected string, actual string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	var expectedYAMLAsInterface, actualYAMLAsInterface interface{}
 
 	if err := yaml.Unmarshal([]byte(expected), &expectedYAMLAsInterface); err != nil {
 		return Fail(t, fmt.Sprintf("Expected value ('%s') is not valid yaml.\nYAML parsing error: '%s'", expected, err.Error()), msgAndArgs...)
 	}
 
 	if err := yaml.Unmarshal([]byte(actual), &actualYAMLAsInterface); err != nil {
 		return Fail(t, fmt.Sprintf("Input ('%s') needs to be valid yaml.\nYAML error: '%s'", actual, err.Error()), msgAndArgs...)
 	}
 
 	return Equal(t, expectedYAMLAsInterface, actualYAMLAsInterface, msgAndArgs...)
 }
 
 func typeAndKind(v interface{}) (reflect.Type, reflect.Kind) {
 	t := reflect.TypeOf(v)
 	k := t.Kind()
 
 	if k == reflect.Ptr {
 		t = t.Elem()
 		k = t.Kind()
 	}
 	return t, k
 }
 
 // diff returns a diff of both values as long as both are of the same type and
 // are a struct, map, slice, array or string. Otherwise it returns an empty string.
 func diff(expected interface{}, actual interface{}) string {
 	if expected == nil || actual == nil {
 		return ""
 	}
 
 	et, ek := typeAndKind(expected)
 	at, _ := typeAndKind(actual)
 
 	if et != at {
 		return ""
 	}
 
 	if ek != reflect.Struct && ek != reflect.Map && ek != reflect.Slice && ek != reflect.Array && ek != reflect.String {
 		return ""
 	}
 
 	var e, a string
 
 	switch et {
 	case reflect.TypeOf(""):
 		e = reflect.ValueOf(expected).String()
 		a = reflect.ValueOf(actual).String()
 	case reflect.TypeOf(time.Time{}):
 		e = spewConfigStringerEnabled.Sdump(expected)
 		a = spewConfigStringerEnabled.Sdump(actual)
 	default:
 		e = spewConfig.Sdump(expected)
 		a = spewConfig.Sdump(actual)
 	}
 
 	diff, _ := difflib.GetUnifiedDiffString(difflib.UnifiedDiff{
 		A:        difflib.SplitLines(e),
 		B:        difflib.SplitLines(a),
 		FromFile: "Expected",
 		FromDate: "",
 		ToFile:   "Actual",
 		ToDate:   "",
 		Context:  1,
 	})
 
 	return "\n\nDiff:\n" + diff
 }
 
 func isFunction(arg interface{}) bool {
 	if arg == nil {
 		return false
 	}
 	return reflect.TypeOf(arg).Kind() == reflect.Func
 }
 
 var spewConfig = spew.ConfigState{
 	Indent:                  " ",
 	DisablePointerAddresses: true,
 	DisableCapacities:       true,
 	SortKeys:                true,
 	DisableMethods:          true,
 	MaxDepth:                10,
 }
 
 var spewConfigStringerEnabled = spew.ConfigState{
 	Indent:                  " ",
 	DisablePointerAddresses: true,
 	DisableCapacities:       true,
 	SortKeys:                true,
 	MaxDepth:                10,
 }
 
 type tHelper interface {
 	Helper()
 }
 
 // Eventually asserts that given condition will be met in waitFor time,
 // periodically checking target function each tick.
 //
 //	assert.Eventually(t, func() bool { return true; }, time.Second, 10*time.Millisecond)
 func Eventually(t TestingT, condition func() bool, waitFor time.Duration, tick time.Duration, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	ch := make(chan bool, 1)
 
 	timer := time.NewTimer(waitFor)
 	defer timer.Stop()
 
 	ticker := time.NewTicker(tick)
 	defer ticker.Stop()
 
 	for tick := ticker.C; ; {
 		select {
 		case <-timer.C:
 			return Fail(t, "Condition never satisfied", msgAndArgs...)
 		case <-tick:
 			tick = nil
 			go func() { ch <- condition() }()
 		case v := <-ch:
 			if v {
 				return true
 			}
 			tick = ticker.C
 		}
 	}
 }
 
 // CollectT implements the TestingT interface and collects all errors.
 type CollectT struct {
 	errors []error
 }
 
 // Errorf collects the error.
 func (c *CollectT) Errorf(format string, args ...interface{}) {
 	c.errors = append(c.errors, fmt.Errorf(format, args...))
 }
 
 // FailNow panics.
 func (c *CollectT) FailNow() {
 	panic("Assertion failed")
 }
 
 // Reset clears the collected errors.
 func (c *CollectT) Reset() {
 	c.errors = nil
 }
 
 // Copy copies the collected errors to the supplied t.
 func (c *CollectT) Copy(t TestingT) {
 	if tt, ok := t.(tHelper); ok {
 		tt.Helper()
 	}
 	for _, err := range c.errors {
 		t.Errorf("%v", err)
 	}
 }
 
 // EventuallyWithT asserts that given condition will be met in waitFor time,
 // periodically checking target function each tick. In contrast to Eventually,
 // it supplies a CollectT to the condition function, so that the condition
 // function can use the CollectT to call other assertions.
 // The condition is considered "met" if no errors are raised in a tick.
 // The supplied CollectT collects all errors from one tick (if there are any).
 // If the condition is not met before waitFor, the collected errors of
 // the last tick are copied to t.
 //
 //	externalValue := false
 //	go func() {
 //		time.Sleep(8*time.Second)
 //		externalValue = true
 //	}()
 //	assert.EventuallyWithT(t, func(c *assert.CollectT) {
 //		// add assertions as needed; any assertion failure will fail the current tick
 //		assert.True(c, externalValue, "expected 'externalValue' to be true")
 //	}, 1*time.Second, 10*time.Second, "external state has not changed to 'true'; still false")
 func EventuallyWithT(t TestingT, condition func(collect *CollectT), waitFor time.Duration, tick time.Duration, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	collect := new(CollectT)
 	ch := make(chan bool, 1)
 
 	timer := time.NewTimer(waitFor)
 	defer timer.Stop()
 
 	ticker := time.NewTicker(tick)
 	defer ticker.Stop()
 
 	for tick := ticker.C; ; {
 		select {
 		case <-timer.C:
 			collect.Copy(t)
 			return Fail(t, "Condition never satisfied", msgAndArgs...)
 		case <-tick:
 			tick = nil
 			collect.Reset()
 			go func() {
 				condition(collect)
 				ch <- len(collect.errors) == 0
 			}()
 		case v := <-ch:
 			if v {
 				return true
 			}
 			tick = ticker.C
 		}
 	}
 }
 
 // Never asserts that the given condition doesn't satisfy in waitFor time,
 // periodically checking the target function each tick.
 //
 //	assert.Never(t, func() bool { return false; }, time.Second, 10*time.Millisecond)
 func Never(t TestingT, condition func() bool, waitFor time.Duration, tick time.Duration, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 
 	ch := make(chan bool, 1)
 
 	timer := time.NewTimer(waitFor)
 	defer timer.Stop()
 
 	ticker := time.NewTicker(tick)
 	defer ticker.Stop()
 
 	for tick := ticker.C; ; {
 		select {
 		case <-timer.C:
 			return true
 		case <-tick:
 			tick = nil
 			go func() { ch <- condition() }()
 		case v := <-ch:
 			if v {
 				return Fail(t, "Condition satisfied", msgAndArgs...)
 			}
 			tick = ticker.C
 		}
 	}
 }
 
 // ErrorIs asserts that at least one of the errors in err's chain matches target.
 // This is a wrapper for errors.Is.
 func ErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if errors.Is(err, target) {
 		return true
 	}
 
 	var expectedText string
 	if target != nil {
 		expectedText = target.Error()
 	}
 
 	chain := buildErrorChainString(err)
 
 	return Fail(t, fmt.Sprintf("Target error should be in err chain:\n"+
 		"expected: %q\n"+
 		"in chain: %s", expectedText, chain,
 	), msgAndArgs...)
 }
 
 // NotErrorIs asserts that at none of the errors in err's chain matches target.
 // This is a wrapper for errors.Is.
 func NotErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if !errors.Is(err, target) {
 		return true
 	}
 
 	var expectedText string
 	if target != nil {
 		expectedText = target.Error()
 	}
 
 	chain := buildErrorChainString(err)
 
 	return Fail(t, fmt.Sprintf("Target error should not be in err chain:\n"+
 		"found: %q\n"+
 		"in chain: %s", expectedText, chain,
 	), msgAndArgs...)
 }
 
 // ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
 // This is a wrapper for errors.As.
 func ErrorAs(t TestingT, err error, target interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
 	}
 	if errors.As(err, target) {
 		return true
 	}
 
 	chain := buildErrorChainString(err)
 
 	return Fail(t, fmt.Sprintf("Should be in error chain:\n"+
 		"expected: %q\n"+
 		"in chain: %s", target, chain,
 	), msgAndArgs...)
 }
 
 func buildErrorChainString(err error) string {
 	if err == nil {
 		return ""
 	}
 
 	e := errors.Unwrap(err)
 	chain := fmt.Sprintf("%q", err.Error())
 	for e != nil {
 		chain += fmt.Sprintf("\n\t%q", e.Error())
 		e = errors.Unwrap(e)
 	}
 	return chain
 }