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// Copyright (c) 2012-2022 The ANTLR Project. All rights reserved.
// Use of this file is governed by the BSD 3-clause license that
// can be found in the LICENSE.txt file in the project root.
// These assert functions are borrowed from https://github.com/stretchr/testify/ (MIT License)
package antlr
import (
"fmt"
"reflect"
"testing"
)
type assert struct {
t *testing.T
}
func assertNew(t *testing.T) *assert {
return &assert{
t: t,
}
}
func (a *assert) Equal(expected, actual interface{}) bool {
if !objectsAreEqual(expected, actual) {
return a.Fail(fmt.Sprintf("Not equal:\n"+
"expected: %#v\n"+
" actual: %#v\n", expected, actual))
}
return true
}
func objectsAreEqual(expected, actual interface{}) bool {
if expected == nil || actual == nil {
return expected == actual
}
return reflect.DeepEqual(expected, actual)
}
func (a *assert) Nil(object interface{}) bool {
if isNil(object) {
return true
}
return a.Fail(fmt.Sprintf("Expected nil, but got: %#v", object))
}
func (a *assert) NotNil(object interface{}) bool {
if !isNil(object) {
return true
}
return a.Fail("Expected value not to be nil.")
}
// 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()
if kind >= reflect.Chan && kind <= reflect.Slice && value.IsNil() {
return true
}
return false
}
func (a *assert) Panics(f func()) bool {
if funcDidPanic, panicValue := didPanic(f); !funcDidPanic {
return a.Fail(fmt.Sprintf("func %p should panic\n\r\tPanic value:\t%v", f, panicValue))
}
return true
}
// Fail reports a failure through
func (a *assert) Fail(failureMessage string) bool {
a.t.Errorf("%s", failureMessage)
return false
}
// didPanic returns true if the function passed to it panics. Otherwise, it returns false.
func didPanic(f func()) (bool, interface{}) {
didPanic := false
var message interface{}
func() {
defer func() {
if message = recover(); message != nil {
didPanic = true
}
}()
// call the target function
f()
}()
return didPanic, message
}
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