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How to use Fatalf method of gomock_test Package

Best Mock code snippet using gomock_test.Fatalf

controller_test.go

Source:controller_test.go

...56				actual = "pass"57			}58			e.t.Error("Expected fatal failure, but got a", actual)59		} else if token, ok := err.(*struct{}); ok && token == &e.fatalToken {60			// This is okay - the panic is from Fatalf().61			if expectedErrMsgs != nil {62				// assert that the actual error message63				// contains expectedErrMsgs64				// check the last actualErrMsg, because the previous messages come from previous errors65				actualErrMsg := e.log[len(e.log)-1]66				for _, expectedErrMsg := range expectedErrMsgs {67					if !strings.Contains(actualErrMsg, expectedErrMsg) {68						e.t.Errorf("Error message:\ngot: %q\nwant to contain: %q\n", actualErrMsg, expectedErrMsg)69					}70				}71			}72			return73		} else {74			// Some other panic.75			panic(err)76		}77	}()78	fn()79}80// recoverUnexpectedFatal can be used as a deferred call in test cases to81// recover from and display a call to ErrorReporter.Fatalf().82func (e *ErrorReporter) recoverUnexpectedFatal() {83	err := recover()84	if err == nil {85		// No panic.86	} else if token, ok := err.(*struct{}); ok && token == &e.fatalToken {87		// Unexpected fatal error happened.88		e.t.Error("Got unexpected fatal error(s). All errors up to this point:")89		e.reportLog()90		return91	} else {92		// Some other panic.93		panic(err)94	}95}96func (e *ErrorReporter) Log(args ...interface{}) {97	e.log = append(e.log, fmt.Sprint(args...))98}99func (e *ErrorReporter) Logf(format string, args ...interface{}) {100	e.log = append(e.log, fmt.Sprintf(format, args...))101}102func (e *ErrorReporter) Errorf(format string, args ...interface{}) {103	e.Logf(format, args...)104	e.failed = true105}106func (e *ErrorReporter) Fatalf(format string, args ...interface{}) {107	e.Logf(format, args...)108	e.failed = true109	panic(&e.fatalToken)110}111type HelperReporter struct {112	gomock.TestReporter113	helper int114}115func (h *HelperReporter) Helper() {116	h.helper++117}118// A type purely for use as a receiver in testing the Controller.119type Subject struct{}120func (s *Subject) FooMethod(arg string) int {121	return 0122}123func (s *Subject) BarMethod(arg string) int {124	return 0125}126func (s *Subject) VariadicMethod(arg int, vararg ...string) {}127// A type purely for ActOnTestStructMethod128type TestStruct struct {129	Number  int130	Message string131}132func (s *Subject) ActOnTestStructMethod(arg TestStruct, arg1 int) int {133	return 0134}135func (s *Subject) SetArgMethod(sliceArg []byte, ptrArg *int) {}136func assertEqual(t *testing.T, expected interface{}, actual interface{}) {137	if !reflect.DeepEqual(expected, actual) {138		t.Errorf("Expected %+v, but got %+v", expected, actual)139	}140}141func createFixtures(t *testing.T) (reporter *ErrorReporter, ctrl *gomock.Controller) {142	// reporter acts as a testing.T-like object that we pass to the143	// Controller. We use it to test that the mock considered tests144	// successful or failed.145	reporter = NewErrorReporter(t)146	ctrl = gomock.NewController(reporter)147	return148}149func TestNoCalls(t *testing.T) {150	reporter, ctrl := createFixtures(t)151	ctrl.Finish()152	reporter.assertPass("No calls expected or made.")153}154func TestNoRecordedCallsForAReceiver(t *testing.T) {155	reporter, ctrl := createFixtures(t)156	subject := new(Subject)157	reporter.assertFatal(func() {158		ctrl.Call(subject, "NotRecordedMethod", "argument")159	}, "Unexpected call to", "there are no expected calls of the method \"NotRecordedMethod\" for that receiver")160	ctrl.Finish()161}162func TestNoRecordedMatchingMethodNameForAReceiver(t *testing.T) {163	reporter, ctrl := createFixtures(t)164	subject := new(Subject)165	ctrl.RecordCall(subject, "FooMethod", "argument")166	reporter.assertFatal(func() {167		ctrl.Call(subject, "NotRecordedMethod", "argument")168	}, "Unexpected call to", "there are no expected calls of the method \"NotRecordedMethod\" for that receiver")169	reporter.assertFatal(func() {170		// The expected call wasn't made.171		ctrl.Finish()172	})173}174// This tests that a call with an arguments of some primitive type matches a recorded call.175func TestExpectedMethodCall(t *testing.T) {176	reporter, ctrl := createFixtures(t)177	subject := new(Subject)178	ctrl.RecordCall(subject, "FooMethod", "argument")179	ctrl.Call(subject, "FooMethod", "argument")180	ctrl.Finish()181	reporter.assertPass("Expected method call made.")182}183func TestUnexpectedMethodCall(t *testing.T) {184	reporter, ctrl := createFixtures(t)185	subject := new(Subject)186	reporter.assertFatal(func() {187		ctrl.Call(subject, "FooMethod", "argument")188	})189	ctrl.Finish()190}191func TestRepeatedCall(t *testing.T) {192	reporter, ctrl := createFixtures(t)193	subject := new(Subject)194	ctrl.RecordCall(subject, "FooMethod", "argument").Times(3)195	ctrl.Call(subject, "FooMethod", "argument")196	ctrl.Call(subject, "FooMethod", "argument")197	ctrl.Call(subject, "FooMethod", "argument")198	reporter.assertPass("After expected repeated method calls.")199	reporter.assertFatal(func() {200		ctrl.Call(subject, "FooMethod", "argument")201	})202	ctrl.Finish()203	reporter.assertFail("After calling one too many times.")204}205func TestUnexpectedArgCount(t *testing.T) {206	reporter, ctrl := createFixtures(t)207	defer reporter.recoverUnexpectedFatal()208	subject := new(Subject)209	ctrl.RecordCall(subject, "FooMethod", "argument")210	reporter.assertFatal(func() {211		// This call is made with the wrong number of arguments...212		ctrl.Call(subject, "FooMethod", "argument", "extra_argument")213	}, "Unexpected call to", "wrong number of arguments", "Got: 2, want: 1")214	reporter.assertFatal(func() {215		// ... so is this.216		ctrl.Call(subject, "FooMethod")217	}, "Unexpected call to", "wrong number of arguments", "Got: 0, want: 1")218	reporter.assertFatal(func() {219		// The expected call wasn't made.220		ctrl.Finish()221	})222}223// This tests that a call with complex arguments (a struct and some primitive type) matches a recorded call.224func TestExpectedMethodCall_CustomStruct(t *testing.T) {225	reporter, ctrl := createFixtures(t)226	subject := new(Subject)227	expectedArg0 := TestStruct{Number: 123, Message: "hello"}228	ctrl.RecordCall(subject, "ActOnTestStructMethod", expectedArg0, 15)229	ctrl.Call(subject, "ActOnTestStructMethod", expectedArg0, 15)230	reporter.assertPass("Expected method call made.")231}232func TestUnexpectedArgValue_FirstArg(t *testing.T) {233	reporter, ctrl := createFixtures(t)234	defer reporter.recoverUnexpectedFatal()235	subject := new(Subject)236	expectedArg0 := TestStruct{Number: 123, Message: "hello %s"}237	ctrl.RecordCall(subject, "ActOnTestStructMethod", expectedArg0, 15)238	reporter.assertFatal(func() {239		// the method argument (of TestStruct type) has 1 unexpected value (for the Message field)240		ctrl.Call(subject, "ActOnTestStructMethod", TestStruct{Number: 123, Message: "no message"}, 15)241	}, "Unexpected call to", "doesn't match the argument at index 0",242		"Got: {123 no message} (gomock_test.TestStruct)\nWant: is equal to {123 hello %s} (gomock_test.TestStruct)")243	reporter.assertFatal(func() {244		// the method argument (of TestStruct type) has 2 unexpected values (for both fields)245		ctrl.Call(subject, "ActOnTestStructMethod", TestStruct{Number: 11, Message: "no message"}, 15)246	}, "Unexpected call to", "doesn't match the argument at index 0",247		"Got: {11 no message} (gomock_test.TestStruct)\nWant: is equal to {123 hello %s} (gomock_test.TestStruct)")248	reporter.assertFatal(func() {249		// The expected call wasn't made.250		ctrl.Finish()251	})252}253func TestUnexpectedArgValue_SecondArg(t *testing.T) {254	reporter, ctrl := createFixtures(t)255	defer reporter.recoverUnexpectedFatal()256	subject := new(Subject)257	expectedArg0 := TestStruct{Number: 123, Message: "hello"}258	ctrl.RecordCall(subject, "ActOnTestStructMethod", expectedArg0, 15)259	reporter.assertFatal(func() {260		ctrl.Call(subject, "ActOnTestStructMethod", TestStruct{Number: 123, Message: "hello"}, 3)261	}, "Unexpected call to", "doesn't match the argument at index 1",262		"Got: 3 (int)\nWant: is equal to 15 (int)")263	reporter.assertFatal(func() {264		// The expected call wasn't made.265		ctrl.Finish()266	})267}268func TestUnexpectedArgValue_WantFormatter(t *testing.T) {269	reporter, ctrl := createFixtures(t)270	defer reporter.recoverUnexpectedFatal()271	subject := new(Subject)272	expectedArg0 := TestStruct{Number: 123, Message: "hello"}273	ctrl.RecordCall(274		subject,275		"ActOnTestStructMethod",276		expectedArg0,277		gomock.WantFormatter(278			gomock.StringerFunc(func() string { return "is equal to fifteen" }),279			gomock.Eq(15),280		),281	)282	reporter.assertFatal(func() {283		ctrl.Call(subject, "ActOnTestStructMethod", TestStruct{Number: 123, Message: "hello"}, 3)284	}, "Unexpected call to", "doesn't match the argument at index 1",285		"Got: 3 (int)\nWant: is equal to fifteen")286	reporter.assertFatal(func() {287		// The expected call wasn't made.288		ctrl.Finish()289	})290}291func TestUnexpectedArgValue_GotFormatter(t *testing.T) {292	reporter, ctrl := createFixtures(t)293	defer reporter.recoverUnexpectedFatal()294	subject := new(Subject)295	expectedArg0 := TestStruct{Number: 123, Message: "hello"}296	ctrl.RecordCall(297		subject,298		"ActOnTestStructMethod",299		expectedArg0,300		gomock.GotFormatterAdapter(301			gomock.GotFormatterFunc(func(i interface{}) string {302				// Leading 0s303				return fmt.Sprintf("%02d", i)304			}),305			gomock.Eq(15),306		),307	)308	reporter.assertFatal(func() {309		ctrl.Call(subject, "ActOnTestStructMethod", TestStruct{Number: 123, Message: "hello"}, 3)310	}, "Unexpected call to", "doesn't match the argument at index 1",311		"Got: 03\nWant: is equal to 15")312	reporter.assertFatal(func() {313		// The expected call wasn't made.314		ctrl.Finish()315	})316}317func TestAnyTimes(t *testing.T) {318	reporter, ctrl := createFixtures(t)319	subject := new(Subject)320	ctrl.RecordCall(subject, "FooMethod", "argument").AnyTimes()321	for i := 0; i < 100; i++ {322		ctrl.Call(subject, "FooMethod", "argument")323	}324	reporter.assertPass("After 100 method calls.")325	ctrl.Finish()326}327func TestMinTimes1(t *testing.T) {328	// It fails if there are no calls329	reporter, ctrl := createFixtures(t)330	subject := new(Subject)331	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(1)332	reporter.assertFatal(func() {333		ctrl.Finish()334	})335	// It succeeds if there is one call336	_, ctrl = createFixtures(t)337	subject = new(Subject)338	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(1)339	ctrl.Call(subject, "FooMethod", "argument")340	ctrl.Finish()341	// It succeeds if there are many calls342	_, ctrl = createFixtures(t)343	subject = new(Subject)344	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(1)345	for i := 0; i < 100; i++ {346		ctrl.Call(subject, "FooMethod", "argument")347	}348	ctrl.Finish()349}350func TestMaxTimes1(t *testing.T) {351	// It succeeds if there are no calls352	_, ctrl := createFixtures(t)353	subject := new(Subject)354	ctrl.RecordCall(subject, "FooMethod", "argument").MaxTimes(1)355	ctrl.Finish()356	// It succeeds if there is one call357	_, ctrl = createFixtures(t)358	subject = new(Subject)359	ctrl.RecordCall(subject, "FooMethod", "argument").MaxTimes(1)360	ctrl.Call(subject, "FooMethod", "argument")361	ctrl.Finish()362	// It fails if there are more363	reporter, ctrl := createFixtures(t)364	subject = new(Subject)365	ctrl.RecordCall(subject, "FooMethod", "argument").MaxTimes(1)366	ctrl.Call(subject, "FooMethod", "argument")367	reporter.assertFatal(func() {368		ctrl.Call(subject, "FooMethod", "argument")369	})370	ctrl.Finish()371}372func TestMinMaxTimes(t *testing.T) {373	// It fails if there are less calls than specified374	reporter, ctrl := createFixtures(t)375	subject := new(Subject)376	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(2).MaxTimes(2)377	ctrl.Call(subject, "FooMethod", "argument")378	reporter.assertFatal(func() {379		ctrl.Finish()380	})381	// It fails if there are more calls than specified382	reporter, ctrl = createFixtures(t)383	subject = new(Subject)384	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(2).MaxTimes(2)385	ctrl.Call(subject, "FooMethod", "argument")386	ctrl.Call(subject, "FooMethod", "argument")387	reporter.assertFatal(func() {388		ctrl.Call(subject, "FooMethod", "argument")389	})390	// It succeeds if there is just the right number of calls391	_, ctrl = createFixtures(t)392	subject = new(Subject)393	ctrl.RecordCall(subject, "FooMethod", "argument").MaxTimes(2).MinTimes(2)394	ctrl.Call(subject, "FooMethod", "argument")395	ctrl.Call(subject, "FooMethod", "argument")396	ctrl.Finish()397	// If MaxTimes is called after MinTimes is called with 1, MaxTimes takes precedence.398	reporter, ctrl = createFixtures(t)399	subject = new(Subject)400	ctrl.RecordCall(subject, "FooMethod", "argument").MinTimes(1).MaxTimes(2)401	ctrl.Call(subject, "FooMethod", "argument")402	ctrl.Call(subject, "FooMethod", "argument")403	reporter.assertFatal(func() {404		ctrl.Call(subject, "FooMethod", "argument")405	})406	// If MinTimes is called after MaxTimes is called with 1, MinTimes takes precedence.407	_, ctrl = createFixtures(t)408	subject = new(Subject)409	ctrl.RecordCall(subject, "FooMethod", "argument").MaxTimes(1).MinTimes(2)410	for i := 0; i < 100; i++ {411		ctrl.Call(subject, "FooMethod", "argument")412	}413	ctrl.Finish()414}415func TestDo(t *testing.T) {416	_, ctrl := createFixtures(t)417	subject := new(Subject)418	doCalled := false419	var argument string420	wantArg := "argument"421	ctrl.RecordCall(subject, "FooMethod", wantArg).Do(422		func(arg string) {423			doCalled = true424			argument = arg425		})426	if doCalled {427		t.Error("Do() callback called too early.")428	}429	ctrl.Call(subject, "FooMethod", wantArg)430	if !doCalled {431		t.Error("Do() callback not called.")432	}433	if wantArg != argument {434		t.Error("Do callback received wrong argument.")435	}436	ctrl.Finish()437}438func TestDoAndReturn(t *testing.T) {439	_, ctrl := createFixtures(t)440	subject := new(Subject)441	doCalled := false442	var argument string443	wantArg := "argument"444	ctrl.RecordCall(subject, "FooMethod", wantArg).DoAndReturn(445		func(arg string) int {446			doCalled = true447			argument = arg448			return 5449		})450	if doCalled {451		t.Error("Do() callback called too early.")452	}453	rets := ctrl.Call(subject, "FooMethod", wantArg)454	if !doCalled {455		t.Error("Do() callback not called.")456	}457	if wantArg != argument {458		t.Error("Do callback received wrong argument.")459	}460	if len(rets) != 1 {461		t.Fatalf("Return values from Call: got %d, want 1", len(rets))462	}463	if ret, ok := rets[0].(int); !ok {464		t.Fatalf("Return value is not an int")465	} else if ret != 5 {466		t.Errorf("DoAndReturn return value: got %d, want 5", ret)467	}468	ctrl.Finish()469}470func TestSetArgSlice(t *testing.T) {471	_, ctrl := createFixtures(t)472	subject := new(Subject)473	var in = []byte{4, 5, 6}474	var set = []byte{1, 2, 3}475	ctrl.RecordCall(subject, "SetArgMethod", in, nil).SetArg(0, set)476	ctrl.Call(subject, "SetArgMethod", in, nil)477	if !reflect.DeepEqual(in, set) {478		t.Error("Expected SetArg() to modify input slice argument")479	}480	ctrl.Finish()481}482func TestSetArgPtr(t *testing.T) {483	_, ctrl := createFixtures(t)484	subject := new(Subject)485	var in int = 43486	const set = 42487	ctrl.RecordCall(subject, "SetArgMethod", nil, &in).SetArg(1, set)488	ctrl.Call(subject, "SetArgMethod", nil, &in)489	if in != set {490		t.Error("Expected SetArg() to modify value pointed to by argument")491	}492	ctrl.Finish()493}494func TestReturn(t *testing.T) {495	_, ctrl := createFixtures(t)496	subject := new(Subject)497	// Unspecified return should produce "zero" result.498	ctrl.RecordCall(subject, "FooMethod", "zero")499	ctrl.RecordCall(subject, "FooMethod", "five").Return(5)500	assertEqual(501		t,502		[]interface{}{0},503		ctrl.Call(subject, "FooMethod", "zero"))504	assertEqual(505		t,506		[]interface{}{5},507		ctrl.Call(subject, "FooMethod", "five"))508	ctrl.Finish()509}510func TestUnorderedCalls(t *testing.T) {511	reporter, ctrl := createFixtures(t)512	defer reporter.recoverUnexpectedFatal()513	subjectTwo := new(Subject)514	subjectOne := new(Subject)515	ctrl.RecordCall(subjectOne, "FooMethod", "1")516	ctrl.RecordCall(subjectOne, "BarMethod", "2")517	ctrl.RecordCall(subjectTwo, "FooMethod", "3")518	ctrl.RecordCall(subjectTwo, "BarMethod", "4")519	// Make the calls in a different order, which should be fine.520	ctrl.Call(subjectOne, "BarMethod", "2")521	ctrl.Call(subjectTwo, "FooMethod", "3")522	ctrl.Call(subjectTwo, "BarMethod", "4")523	ctrl.Call(subjectOne, "FooMethod", "1")524	reporter.assertPass("After making all calls in different order")525	ctrl.Finish()526	reporter.assertPass("After finish")527}528func commonTestOrderedCalls(t *testing.T) (reporter *ErrorReporter, ctrl *gomock.Controller, subjectOne, subjectTwo *Subject) {529	reporter, ctrl = createFixtures(t)530	subjectOne = new(Subject)531	subjectTwo = new(Subject)532	gomock.InOrder(533		ctrl.RecordCall(subjectOne, "FooMethod", "1").AnyTimes(),534		ctrl.RecordCall(subjectTwo, "FooMethod", "2"),535		ctrl.RecordCall(subjectTwo, "BarMethod", "3"),536	)537	return538}539func TestOrderedCallsCorrect(t *testing.T) {540	reporter, ctrl, subjectOne, subjectTwo := commonTestOrderedCalls(t)541	ctrl.Call(subjectOne, "FooMethod", "1")542	ctrl.Call(subjectTwo, "FooMethod", "2")543	ctrl.Call(subjectTwo, "BarMethod", "3")544	ctrl.Finish()545	reporter.assertPass("After finish")546}547func TestPanicOverridesExpectationChecks(t *testing.T) {548	ctrl := gomock.NewController(t)549	reporter := NewErrorReporter(t)550	reporter.assertFatal(func() {551		ctrl.RecordCall(new(Subject), "FooMethod", "1")552		defer ctrl.Finish()553		reporter.Fatalf("Intentional panic")554	})555}556func TestSetArgWithBadType(t *testing.T) {557	rep, ctrl := createFixtures(t)558	defer ctrl.Finish()559	s := new(Subject)560	// This should catch a type error:561	rep.assertFatal(func() {562		ctrl.RecordCall(s, "FooMethod", "1").SetArg(0, "blah")563	})564	ctrl.Call(s, "FooMethod", "1")565}566func TestTimes0(t *testing.T) {567	rep, ctrl := createFixtures(t)...

Fatalf

Using AI Code Generation

1import (2func TestAdd(t *testing.T) {3	ctrl := gomock.NewController(t)4	defer ctrl.Finish()5	mock := NewMockMyInterface(ctrl)6	mock.EXPECT().Add(1, 2).Return(3)7	fmt.Printf("%d8", mock.Add(1, 2))9}10import (11func TestAdd(t *testing.T) {12	ctrl := gomock.NewController(t)13	defer ctrl.Finish()14	mock := NewMockMyInterface(ctrl)15	mock.EXPECT().Add(1, 2).Return(3)16	fmt.Printf("%d17", mock.Add(1, 2))18}19import (20func TestAdd(t *testing.T) {21	ctrl := gomock.NewController(t)22	defer ctrl.Finish()23	mock := NewMockMyInterface(ctrl)24	mock.EXPECT().Add(1, 2).Return(3)25	fmt.Printf("%d26", mock.Add(1, 2))27}28import (29func TestAdd(t *testing.T) {30	ctrl := gomock.NewController(t)31	defer ctrl.Finish()32	mock := NewMockMyInterface(ctrl)33	mock.EXPECT().Add(1, 2).Return(3)34	fmt.Printf("%d35", mock.Add(1, 2))36}37import (38func TestAdd(t *testing.T) {39	ctrl := gomock.NewController(t)40	defer ctrl.Finish()41	mock := NewMockMyInterface(ctrl)42	mock.EXPECT().Add(1, 2).Return(3)43	fmt.Printf("%d44", mock.Add(1, 2))

Fatalf

Using AI Code Generation

1import "fmt"2func main(){3fmt.Println("Hello World")4}5import "fmt"6func main(){7fmt.Println("Hello World")8}9import "fmt"10func main(){11fmt.Println("Hello World")12}13import "fmt"14func main(){15fmt.Println("Hello World")16}17import "fmt"18func main(){19fmt.Println("Hello World")20}21import "fmt"22func main(){23fmt.Println("Hello World")24}25import "fmt"26func main(){27fmt.Println("Hello World")28}29import "fmt"30func main(){31fmt.Println("Hello World")32}33import "fmt"34func main(){35fmt.Println("Hello World")36}37import "fmt"38func main(){39fmt.Println("Hello World")40}41import "fmt"42func main(){43fmt.Println("Hello World")44}45import "fmt"46func main(){47fmt.Println("Hello World")48}49import "fmt"50func main(){51fmt.Println("Hello World")52}53import

Fatalf

Using AI Code Generation

1import (2func Test1(t *testing.T) {3    t.Fatalf("test1")4}5func Test2(t *testing.T) {6    t.Fatalf("test2")7}8import (9func Test3(t *testing.T) {10    t.Fatalf("test3")11}12func Test4(t *testing.T) {13    t.Fatalf("test4")14}15import (16func Test5(t *testing.T) {17    t.Fatalf("test5")18}19func Test6(t *testing.T) {20    t.Fatalf("test6")21}22import (23func Test7(t *testing.T) {24    t.Fatalf("test7")25}26func Test8(t *testing.T) {27    t.Fatalf("test8")28}29import (30func Test9(t *testing.T) {31    t.Fatalf("test9")32}33func Test10(t *testing.T) {34    t.Fatalf("test10")35}36import (37func Test11(t *testing.T) {38    t.Fatalf("test11")39}40func Test12(t *testing.T) {41    t.Fatalf("test12")42}43import (44func Test13(t *testing.T) {45    t.Fatalf("test13")46}47func Test14(t *testing.T) {48    t.Fatalf("test14")49}50import (51func Test15(t *testing.T) {52    t.Fatalf("test15")53}54func Test16(t *testing.T) {55    t.Fatalf("test16")

Fatalf

Using AI Code Generation

1import (2func Test(t *testing.T) {3	_, err := os.Open("no-file.txt")4	if err != nil {5		log.Fatalln("failed to open the file", err)6	}7}8import (9func Test(t *testing.T) {10	_, err := os.Open("no-file.txt")11	if err != nil {12		log.Fatalf("failed to open the file %v", err)13	}14}15import (16func Test(t *testing.T) {17	_, err := os.Open("no-file.txt")18	if err != nil {19		log.Fatalf("failed to open the file %v", err)20	}21}22import (23func Test(t *testing.T) {24	_, err := os.Open("no-file.txt")25	if err != nil {26		log.Fatalf("failed to open the file %v", err)27	}28}29import (30func Test(t *testing.T) {31	_, err := os.Open("no-file.txt")32	if err != nil {33		log.Fatalf("failed to open the file %v", err)34	}35}36import (37func Test(t *testing.T) {38	_, err := os.Open("no-file.txt")39	if err != nil {40		log.Fatalf("failed to open the file %v", err)41	}42}43import (

Fatalf

Using AI Code Generation

1import (2func main() {3	ctrl := gomock.NewController(gomock.FailOnPanic)4	defer ctrl.Finish()5	mockObj := mock.NewMockMyInterface(ctrl)6	mockObj.EXPECT().DoSomething().Return(1, nil)7	mockObj.EXPECT().DoSomething().Return(2, nil)8	fmt.Println(mockObj.DoSomething())9	fmt.Println(mockObj.DoSomething())10}11--- FAIL: Test (0.00s)12testing.tRunner.func1(0xc0000a6000)13panic(0x4e0a20, 0xc0000c60e0)14github.com/golang/mock/gomock.(*Controller).Finish(0xc0000c6000)15panic(0x4e0a20, 0xc0000c60e0)16main.main()17import (18func Test(t *testing.T) {19	ctrl := gomock.NewController(t)20	defer ctrl.Finish()21	mockObj := mock.NewMockMyInterface(ctrl)22	mockObj.EXPECT().DoSomething().Return(1, nil)23	mockObj.EXPECT().DoSomething().Return(2, nil)24	fmt.Println(mockObj.DoSomething())25	fmt.Println(mock

Fatalf

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4	log.Println("Hello World")5	log.Fatalln("Hello World")6	log.Panicln("Hello World")7}8import (9func main() {10	fmt.Println("Hello World")11	log.Println("Hello World")12	log.Fatalln("Hello World")13	log.Panicln("Hello World")14}15import (16func main() {17	fmt.Println("Hello World")18	log.Println("Hello World")19	log.Fatalln("Hello World")20	log.Panicln("Hello World")21}22import (23func main() {24	fmt.Println("Hello World")25	log.Println("Hello World")26	log.Fatalln("Hello World")27	log.Panicln("Hello World")28}29import (30func main() {31	fmt.Println("Hello World")32	log.Println("Hello World")33	log.Fatalln("Hello World")34	log.Panicln("Hello World")35}36import (37func main() {38	fmt.Println("Hello World")39	log.Println("Hello World")40	log.Fatalln("Hello World")41	log.Panicln("Hello World")42}43import (44func main() {45	fmt.Println("Hello World")46	log.Println("Hello World")47	log.Fatalln("Hello World")48	log.Panicln("Hello World")49}

Fatalf

Using AI Code Generation

1import (2func main() {3    t := new(testing.T)4    t.Fatalf("Fatal error")5    fmt.Println("This code will not execute")6}

Fatalf

Using AI Code Generation

1import (2func main() {3	gomock_test.Fatalf("Fatal error")4	fmt.Println("Hello World")5}6import (7func main() {8	gomock_test.Fatalf("Fatal error")9	fmt.Println("Hello World")10}11import (12func main() {13	gomock_test.Fatalf("Fatal error")14	fmt.Println("Hello World")15}16import (17func main() {18	gomock_test.Fatalf("Fatal error")19	fmt.Println("Hello World")20}21import (22func main() {23	gomock_test.Fatalf("Fatal error")24	fmt.Println("Hello World")25}26import (27func main() {28	gomock_test.Fatalf("Fatal error")29	fmt.Println("Hello World")30}31import (32func main() {33	gomock_test.Fatalf("Fatal error")34	fmt.Println("Hello World")35}

Fatalf

Using AI Code Generation

1import (2func TestHelloWorld(t *testing.T) {3	ctrl := gomock.NewController(t)4	defer ctrl.Finish()5	mock := gomock_test.NewMockHelloWorld(ctrl)6	mock.EXPECT().HelloWorld().Return("Hello World")7	result := mock.HelloWorld()8	if result != "Hello World" {9		t.Fatalf("expected 'Hello World' but got %s", result)10	}11}12import (13type HelloWorld interface {14	HelloWorld() string15}16type mockHelloWorld struct {17}18type _MockHelloWorldRecorder struct {19}20func NewMockHelloWorld(ctrl *gomock.Controller) *mockHelloWorld {21	mock := &mockHelloWorld{ctrl: ctrl}22	mock.recorder = &_MockHelloWorldRecorder{mock}23}24func (_m *mockHelloWorld) EXPECT() *_MockHelloWorldRecorder {25}26func (_m *mockHelloWorld) HelloWorld() string {27	ret := _m.ctrl.Call(_m, "HelloWorld")28	ret0, _ := ret[0].(string)29}30type HelloWorld interface {31	HelloWorld() string32}33type HelloWorld interface {34	HelloWorld() string35}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.