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is.go
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is.go
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// Package is provides test assertion utilities.
package is
import (
"bytes"
"encoding/json"
"reflect"
"testing"
)
func errorf(t *testing.T, expected, actual any) {
t.Helper()
t.Errorf("\nexpected: %+v\n actual: %+v", expected, actual)
}
func isNil(v any) bool {
if v == nil {
return true
}
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return rv.IsNil()
}
return false
}
// Nil asserts that the given value is nil.
func Nil(t *testing.T, actual any) bool {
t.Helper()
if !isNil(actual) {
errorf(t, nil, actual)
return false
}
return true
}
func equal(expected, actual any) 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)
}
// Equal asserts that the given values are equal.
func Equal(t *testing.T, expected, actual any) bool {
t.Helper()
if !equal(expected, actual) {
errorf(t, expected, actual)
return false
}
return true
}
// MustEqual requires that the given values are equal.
func MustEqual(t *testing.T, expected, actual any) {
t.Helper()
if !Equal(t, expected, actual) {
t.Fatal()
}
}
// EqualError asserts that the given error values are equal.
func EqualError(t *testing.T, expected, actual error) bool {
t.Helper()
if expected == nil || actual == nil {
return Equal(t, expected, actual)
}
return Equal(t, expected.Error(), actual.Error())
}
// MustEqualError requires that the given error values are equal.
func MustEqualError(t *testing.T, expected, actual error) {
t.Helper()
if expected == nil || actual == nil {
MustEqual(t, expected, actual)
return
}
MustEqual(t, expected.Error(), actual.Error())
}
// NoError asserts that the given err is nil.
func NoError(t *testing.T, err error) bool {
t.Helper()
if err != nil {
errorf(t, nil, err)
return false
}
return true
}
// MustNoError requires that the given err is nil.
func MustNoError(t *testing.T, err error) {
t.Helper()
if !NoError(t, err) {
t.Fatal()
}
}
// Error asserts that the given err is not nil.
func Error(t *testing.T, err error) bool {
t.Helper()
if err == nil {
errorf(t, "an error", err)
return false
}
return true
}
// MustError requires that the given err is not nil.
func MustError(t *testing.T, err error) {
t.Helper()
if !Error(t, err) {
t.Fatal()
}
}
// EqualJSON asserts that the given strings are equal after unmarshaling as json.
func EqualJSON(t *testing.T, expected, actual string) bool {
t.Helper()
var em map[string]any
err := json.Unmarshal([]byte(expected), &em)
MustNoError(t, err)
var am map[string]any
err = json.Unmarshal([]byte(actual), &am)
MustNoError(t, err)
if !reflect.DeepEqual(em, am) {
errorf(t, expected, actual)
return false
}
return true
}