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How to use CheckPanic method of test Package

Best Go-testdeep code snippet using test.CheckPanic

feed_test.go

Source:feed_test.go

1// Copyright 2016 The go-ethereum Authors2// This file is part of the go-ethereum library.3//4// The go-ethereum library is free software: you can redistribute it and/or modify5// it under the terms of the GNU Lesser General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.8//9// The go-ethereum library is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the12// GNU Lesser General Public License for more details.13//14// You should have received a copy of the GNU Lesser General Public License15// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.16package event17import (18	"fmt"19	"reflect"20	"sync"21	"testing"22	"time"23)24func TestFeedPanics(t *testing.T) {25	{26		var f Feed27		f.Send(int(2))28		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(int(0))}29		if err := checkPanic(want, func() { f.Send(uint64(2)) }); err != nil {30			t.Error(err)31		}32	}33	{34		var f Feed35		ch := make(chan int)36		f.Subscribe(ch)37		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(int(0))}38		if err := checkPanic(want, func() { f.Send(uint64(2)) }); err != nil {39			t.Error(err)40		}41	}42	{43		var f Feed44		f.Send(int(2))45		want := feedTypeError{op: "Subscribe", got: reflect.TypeOf(make(chan uint64)), want: reflect.TypeOf(make(chan<- int))}46		if err := checkPanic(want, func() { f.Subscribe(make(chan uint64)) }); err != nil {47			t.Error(err)48		}49	}50	{51		var f Feed52		if err := checkPanic(errBadChannel, func() { f.Subscribe(make(<-chan int)) }); err != nil {53			t.Error(err)54		}55	}56	{57		var f Feed58		if err := checkPanic(errBadChannel, func() { f.Subscribe(int(0)) }); err != nil {59			t.Error(err)60		}61	}62}63func checkPanic(want error, fn func()) (err error) {64	defer func() {65		panic := recover()66		if panic == nil {67			err = fmt.Errorf("didn't panic")68		} else if !reflect.DeepEqual(panic, want) {69			err = fmt.Errorf("panicked with wrong error: got %q, want %q", panic, want)70		}71	}()72	fn()73	return nil74}75func TestFeed(t *testing.T) {76	var feed Feed77	var done, subscribed sync.WaitGroup78	subscriber := func(i int) {79		defer done.Done()80		subchan := make(chan int)81		sub := feed.Subscribe(subchan)82		timeout := time.NewTimer(2 * time.Second)83		subscribed.Done()84		select {85		case v := <-subchan:86			if v != 1 {87				t.Errorf("%d: received value %d, want 1", i, v)88			}89		case <-timeout.C:90			t.Errorf("%d: receive timeout", i)91		}92		sub.Unsubscribe()93		select {94		case _, ok := <-sub.Err():95			if ok {96				t.Errorf("%d: error channel not closed after unsubscribe", i)97			}98		case <-timeout.C:99			t.Errorf("%d: unsubscribe timeout", i)100		}101	}102	const n = 1000103	done.Add(n)104	subscribed.Add(n)105	for i := 0; i < n; i++ {106		go subscriber(i)107	}108	subscribed.Wait()109	if nsent := feed.Send(1); nsent != n {110		t.Errorf("first send delivered %d times, want %d", nsent, n)111	}112	if nsent := feed.Send(2); nsent != 0 {113		t.Errorf("second send delivered %d times, want 0", nsent)114	}115	done.Wait()116}117func TestFeedSubscribeSameChannel(t *testing.T) {118	var (119		feed Feed120		done sync.WaitGroup121		ch   = make(chan int)122		sub1 = feed.Subscribe(ch)123		sub2 = feed.Subscribe(ch)124		_    = feed.Subscribe(ch)125	)126	expectSends := func(value, n int) {127		if nsent := feed.Send(value); nsent != n {128			t.Errorf("send delivered %d times, want %d", nsent, n)129		}130		done.Done()131	}132	expectRecv := func(wantValue, n int) {133		for i := 0; i < n; i++ {134			if v := <-ch; v != wantValue {135				t.Errorf("received %d, want %d", v, wantValue)136			}137		}138	}139	done.Add(1)140	go expectSends(1, 3)141	expectRecv(1, 3)142	done.Wait()143	sub1.Unsubscribe()144	done.Add(1)145	go expectSends(2, 2)146	expectRecv(2, 2)147	done.Wait()148	sub2.Unsubscribe()149	done.Add(1)150	go expectSends(3, 1)151	expectRecv(3, 1)152	done.Wait()153}154func TestFeedSubscribeBlockedPost(t *testing.T) {155	var (156		feed   Feed157		nsends = 2000158		ch1    = make(chan int)159		ch2    = make(chan int)160		wg     sync.WaitGroup161	)162	defer wg.Wait()163	feed.Subscribe(ch1)164	wg.Add(nsends)165	for i := 0; i < nsends; i++ {166		go func() {167			feed.Send(99)168			wg.Done()169		}()170	}171	sub2 := feed.Subscribe(ch2)172	defer sub2.Unsubscribe()173	// We're done when ch1 has received N times.174	// The number of receives on ch2 depends on scheduling.175	for i := 0; i < nsends; {176		select {177		case <-ch1:178			i++179		case <-ch2:180		}181	}182}183func TestFeedUnsubscribeBlockedPost(t *testing.T) {184	var (185		feed   Feed186		nsends = 200187		chans  = make([]chan int, 2000)188		subs   = make([]Subscription, len(chans))189		bchan  = make(chan int)190		bsub   = feed.Subscribe(bchan)191		wg     sync.WaitGroup192	)193	for i := range chans {194		chans[i] = make(chan int, nsends)195	}196	// Queue up some Sends. None of these can make progress while bchan isn't read.197	wg.Add(nsends)198	for i := 0; i < nsends; i++ {199		go func() {200			feed.Send(99)201			wg.Done()202		}()203	}204	// Subscribe the other channels.205	for i, ch := range chans {206		subs[i] = feed.Subscribe(ch)207	}208	// Unsubscribe them again.209	for _, sub := range subs {210		sub.Unsubscribe()211	}212	// Unblock the Sends.213	bsub.Unsubscribe()214	wg.Wait()215}216func TestFeedUnsubscribeFromInbox(t *testing.T) {217	var (218		feed Feed219		ch1  = make(chan int)220		ch2  = make(chan int)221		sub1 = feed.Subscribe(ch1)222		sub2 = feed.Subscribe(ch1)223		sub3 = feed.Subscribe(ch2)224	)225	if len(feed.inbox) != 3 {226		t.Errorf("inbox length != 3 after subscribe")227	}228	if len(feed.sendCases) != 1 {229		t.Errorf("sendCases is non-empty after unsubscribe")230	}231	sub1.Unsubscribe()232	sub2.Unsubscribe()233	sub3.Unsubscribe()234	if len(feed.inbox) != 0 {235		t.Errorf("inbox is non-empty after unsubscribe")236	}237	if len(feed.sendCases) != 1 {238		t.Errorf("sendCases is non-empty after unsubscribe")239	}240}241func BenchmarkFeedSend1000(b *testing.B) {242	var (243		done  sync.WaitGroup244		feed  Feed245		nsubs = 1000246	)247	subscriber := func(ch <-chan int) {248		for i := 0; i < b.N; i++ {249			<-ch250		}251		done.Done()252	}253	done.Add(nsubs)254	for i := 0; i < nsubs; i++ {255		ch := make(chan int, 200)256		feed.Subscribe(ch)257		go subscriber(ch)258	}259	// The actual benchmark.260	b.ResetTimer()261	for i := 0; i < b.N; i++ {262		if feed.Send(i) != nsubs {263			panic("wrong number of sends")264		}265	}266	b.StopTimer()267	done.Wait()268}...

encode_test.go

Source:encode_test.go

1// SPDX-FileCopyrightText: 2021 The Go-SSB Authors2//3// SPDX-License-Identifier: MIT4package legacy5import (6	"archive/zip"7	"encoding/json"8	"errors"9	"fmt"10	"io/ioutil"11	"log"12	"testing"13	"github.com/kylelemons/godebug/diff"14	refs "go.mindeco.de/ssb-refs"15)16type testMessage struct {17	Author          refs.FeedRef18	Hash, Signature string19	Input, NoSig    []byte20}21var testMessages []testMessage22func init() {23	r, err := zip.OpenReader("testdata.zip")24	if err != nil {25		fmt.Println("could not find testdata - run 'node encode_test.js' to create it")26		checkPanic(err)27	}28	defer r.Close()29	if len(r.File)%3 != 0 {30		checkPanic(errors.New("expecting three files per message"))31	}32	testMessages = make([]testMessage, len(r.File)/3+1)33	seq := 134	for i := 0; i < len(r.File); i += 3 {35		full := r.File[i]36		input := r.File[i+1]37		noSig := r.File[i+2]38		// check file structure assumption39		if noSig.Name != fmt.Sprintf("%05d.noSig", seq) {40			checkPanic(fmt.Errorf("unexpected file. wanted '%05d.noSig' got %s", seq, noSig.Name))41		}42		if input.Name != fmt.Sprintf("%05d.input", seq) {43			checkPanic(fmt.Errorf("unexpected file. wanted '%05d.input' got %s", seq, input.Name))44		}45		if full.Name != fmt.Sprintf("%05d.full", seq) {46			checkPanic(fmt.Errorf("unexpected file. wanted '%05d.full' got %s", seq, full.Name))47		}48		// get some data from the full message49		var origMsg struct {50			Key   string51			Value map[string]interface{}52		}53		origRC, err := full.Open()54		if err != nil {55			err = fmt.Errorf("test(%d) - failed to open full: %w", i, err)56			checkPanic(err)57		}58		err = json.NewDecoder(origRC).Decode(&origMsg)59		if err != nil {60			err = fmt.Errorf("test(%d) - could not json decode full: %w", i, err)61			checkPanic(err)62		}63		testMessages[seq].Hash = origMsg.Key64		// get sig65		sig, has := origMsg.Value["signature"]66		if !has {67			if err != nil {68				err = fmt.Errorf("test(%d) - expected signature in value field", i)69				checkPanic(err)70			}71		}72		testMessages[seq].Signature = sig.(string)73		// get author74		a, has := origMsg.Value["author"]75		if !has {76			if err != nil {77				err = fmt.Errorf("test(%d) - expected author in value field", i)78				checkPanic(err)79			}80		}81		testMessages[seq].Author, err = refs.ParseFeedRef(a.(string))82		if err != nil {83			err = fmt.Errorf("test(%d) - failed to parse author ref: %w", i, err)84			checkPanic(err)85		}86		// copy input87		rc, err := input.Open()88		if err != nil {89			err = fmt.Errorf("test(%d) - could not open wanted data: %w", i, err)90			checkPanic(err)91		}92		testMessages[seq].Input, err = ioutil.ReadAll(rc)93		if err != nil {94			err = fmt.Errorf("test(%d) - could not read all data: %w", i, err)95			checkPanic(err)96		}97		if err = rc.Close(); err != nil {98			err = fmt.Errorf("test(%d) - could not close input reader: %w", i, err)99			checkPanic(err)100		}101		// copy wanted output102		rc, err = noSig.Open()103		if err != nil {104			err = fmt.Errorf("test(%d) - could not open wanted data: %w", i, err)105			checkPanic(err)106		}107		testMessages[seq].NoSig, err = ioutil.ReadAll(rc)108		if err != nil {109			err = fmt.Errorf("test(%d) - could not read all wanted data: %w", i, err)110			checkPanic(err)111		}112		// cleanup113		if err = origRC.Close(); err != nil {114			err = fmt.Errorf("test(%d) - could not close reader #2: %w", i, err)115			checkPanic(err)116		}117		seq++118	}119	log.Printf("loaded %d messages from testdata.zip", seq)120}121func checkPanic(err error) {122	if err != nil {123		panic(err)124	}125}126func TestPreserveOrder(t *testing.T) {127	for i := 1; i < 20; i++ {128		tPresve(t, i)129	}130}131func tPresve(t *testing.T, i int) []byte {132	encoded, err := PrettyPrint(testMessages[i].Input)133	if err != nil {134		t.Errorf("PrettyPrint(%d) failed:\n%+v", i, err)135	}136	return encoded137}138func TestComparePreserve(t *testing.T) {139	n := len(testMessages)140	if testing.Short() {141		n = min(50, n)142	}143	for i := 1; i < n; i++ {144		w := string(testMessages[i].Input)145		pBytes := tPresve(t, i)146		p := string(pBytes)147		if d := diff.Diff(w, p); len(d) != 0 && t.Failed() {148			t.Logf("Seq:%d\n%s", i, d)149		}150	}151}...

strmap_test.go

Source:strmap_test.go

1package strmap2import (3	//	"errors"4	"reflect"5	"testing"6)7var sm = StrMap(map[string]interface{}{8	`key1`: `value1`,9	`key2`: map[interface{}]interface{}{`key`: `value`},10	`key3`: []interface{}{`value1`, `value2`, `value3`},11})12func checkPanic(t *testing.T, expect interface{}) {13	got := recover()14	if got == nil || got == expect || reflect.DeepEqual(got, expect) {15		return16	}17	t.Fatalf("unexpected Panic: %T(%#v)", got, got)18}19func TestGet1(t *testing.T) {20	defer checkPanic(t, "no key: nonexist")21	got := sm.Get(`nonexist`)22	t.Errorf("expect panic got: %v\n", got)23}24func TestGet2(t *testing.T) {25	defer checkPanic(t, `invalid character 'v' looking for beginning of value`)26	got := sm.Get(`key1`)27	t.Errorf("expect panic got: %v\n", got)28}29func TestGet3(t *testing.T) {30	defer checkPanic(t, "no key: nonexist")31	got := sm.Get(`key2`).Get(`nonexist`)32	t.Errorf("expect panic got: %v\n", got)33}34func TestGet4(t *testing.T) {35	defer checkPanic(t, `unable to cast []interface {}{"value1", "value2", "value3"}`+36		` of type []interface {} to map[string]interface{}`)37	got := sm.Get(`key3`)38	t.Errorf("expect panic got: %v\n", got)39}40func TestGet5(t *testing.T) {41	expect := StrMap(map[string]interface{}{`key`: `value`})42	if got := sm.Get(`key2`); !reflect.DeepEqual(got, expect) {43		t.Errorf("expect: %v got: %v\n", expect, got)44	}45}46func TestGetString1(t *testing.T) {47	defer checkPanic(t, "no key: nonexist")48	got := sm.GetString(`nonexist`)49	t.Errorf("expect panic got: %v\n", got)50}51func TestGetString2(t *testing.T) {52	if expect, got := `value1`, sm.GetString(`key1`); got != expect {53		t.Errorf("expect: %v got: %v\n", expect, got)54	}55}56func TestGetString3(t *testing.T) {57	defer checkPanic(t, `unable to cast map[interface {}]interface {}{"key":"value"}`+58		` of type map[interface {}]interface {} to string`)59	got := sm.GetString(`key2`)60	t.Errorf("expect panic got: %v\n", got)61}62func TestGetString4(t *testing.T) {63	defer checkPanic(t, `unable to cast []interface {}{"value1", "value2", "value3"}`+64		` of type []interface {} to string`)65	got := sm.GetString(`key3`)66	t.Errorf("expect: panic got: %v\n", got)67}68func TestGetStringSlice1(t *testing.T) {69	defer checkPanic(t, "no key: nonexist")70	got := sm.GetStringSlice(`nonexist`)71	t.Errorf("expect panic got: %v\n", got)72}73func TestGetStringSlice2(t *testing.T) {74	if expect, got := []string{`value1`}, sm.GetStringSlice(`key1`); !reflect.DeepEqual(got, expect) {75		t.Errorf("expect: %v got: %v\n", expect, got)76	}77}78func TestGetStringSlice3(t *testing.T) {79	defer checkPanic(t, `unable to cast map[interface {}]interface {}{"key":"value"}`+80		` of type map[interface {}]interface {} to []string`)81	got := sm.GetStringSlice(`key2`)82	t.Errorf("expect panic got: %v\n", got)83}84func TestGetStringSlice4(t *testing.T) {85	expect, got := []string{`value1`, `value2`, `value3`}, sm.GetStringSlice(`key3`)86	if !reflect.DeepEqual(got, expect) {87		t.Errorf("expect: %v got: %v\n", expect, got)88	}89}...

CheckPanic

Using AI Code Generation

1import (2func main() {3 fmt.Println("main start")4 test.CheckPanic()5 fmt.Println("main end")6}

CheckPanic

Using AI Code Generation

1import (2func main() {3 fmt.Println("Inside main")4 test.CheckPanic()5 fmt.Println("End of main")6}

CheckPanic

Using AI Code Generation

1import (2func main() {3	fmt.Println("Calling test.CheckPanic()...")4	test.CheckPanic()5	fmt.Println("Returned normally from test.CheckPanic()")6}7import (8func main() {9	fmt.Println("Calling test.CheckPanic()...")10	test.CheckPanic()11	fmt.Println("Returned normally from test.CheckPanic()")12}

CheckPanic

Using AI Code Generation

1import (2func main() {3	test.CheckPanic()4	fmt.Println("After panic")5}6import (7func main() {8	test.CheckDefer()9	fmt.Println("After defer")10}11import (12func main() {13	test.CheckDeferPanic()14	fmt.Println("After defer")15}16import (17func main() {18	test.CheckDeferPanicRecover()19	fmt.Println("After defer")20}21import (22func main() {23	test.CheckDeferPanicRecover2()24	fmt.Println("After defer")25}26import (27func main() {28	test.CheckDeferPanicRecover3()29	fmt.Println("After defer")30}31import (32func main() {33	test.CheckDeferPanicRecover4()34	fmt.Println("After defer")35}

CheckPanic

Using AI Code Generation

1func TestCheckPanic(t *testing.T) {2	test.CheckPanic(t, func() {3	})4}5func TestCheckPanic(t *testing.T) {6	test.CheckPanic(t, func() {7	})8}9func TestCheckPanic(t *testing.T) {10	test.CheckPanic(t, func() {11	})12}13func TestCheckPanic(t *testing.T) {14	test.CheckPanic(t, func() {15	})16}17func TestCheckPanic(t *testing.T) {18	test.CheckPanic(t, func() {19	})20}21func TestCheckPanic(t *testing.T) {22	test.CheckPanic(t, func() {23	})24}25func TestCheckPanic(t *testing.T) {26	test.CheckPanic(t, func() {27	})28}29func TestCheckPanic(t *testing.T) {30	test.CheckPanic(t, func() {31	})32}

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