How to use Fatalf method of gomock_test Package

Best Mock code snippet using gomock_test.Fatalf

controller_test.go

Source:controller_test.go Github

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...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)...

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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))

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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

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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")

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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 (

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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

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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}

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

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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}

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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}

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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.

LambdaTest Learning Hubs:

YouTube

You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

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