How to use Gt method of got Package

1// Copyright 2014 The Go Authors.  All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4package main5import (6	"bytes"7	"fmt"8	"io/ioutil"9	"os"10	"path/filepath"11	"strings"12	"testing"13)14const lenChangeId = len("\n\nChange-Id: I") + 2*2015func TestHookCommitMsg(t *testing.T) {16	gt := newGitTest(t)17	defer gt.done()18	// Check that hook adds Change-Id.19	write(t, gt.client+"/msg.txt", "Test message.\n")20	testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")21	data := read(t, gt.client+"/msg.txt")22	if !bytes.Contains(data, []byte("\n\nChange-Id: ")) {23		t.Fatalf("after hook-invoke commit-msg, missing Change-Id:\n%s", data)24	}25	// Check that hook is no-op when Change-Id is already present.26	testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")27	data1 := read(t, gt.client+"/msg.txt")28	if !bytes.Equal(data, data1) {29		t.Fatalf("second hook-invoke commit-msg changed Change-Id:\nbefore:\n%s\n\nafter:\n%s", data, data1)30	}31	// Check that hook rejects multiple Change-Ids.32	write(t, gt.client+"/msgdouble.txt", string(data)+string(data))33	testMainDied(t, "hook-invoke", "commit-msg", gt.client+"/msgdouble.txt")34	const multiple = "git-codereview: multiple Change-Id lines\n"35	if got := testStderr.String(); got != multiple {36		t.Fatalf("unexpected output:\ngot: %q\nwant: %q", got, multiple)37	}38	// Check that hook fails when message is empty.39	write(t, gt.client+"/empty.txt", "\n\n# just a file with\n# comments\n")40	testMainDied(t, "hook-invoke", "commit-msg", gt.client+"/empty.txt")41	const empty = "git-codereview: empty commit message\n"42	if got := testStderr.String(); got != empty {43		t.Fatalf("unexpected output:\ngot: %q\nwant: %q", got, empty)44	}45	// Check that hook inserts a blank line after the first line as needed.46	rewrites := []struct {47		in   string48		want string49	}{50		{in: "all: gofmt", want: "all: gofmt"},51		{in: "all: gofmt\n", want: "all: gofmt\n"},52		{in: "all: gofmt\nahhh", want: "all: gofmt\n\nahhh"},53		{in: "all: gofmt\n\nahhh", want: "all: gofmt\n\nahhh"},54		{in: "all: gofmt\n\n\nahhh", want: "all: gofmt\n\n\nahhh"},55	}56	for _, tt := range rewrites {57		write(t, gt.client+"/in.txt", tt.in)58		testMain(t, "hook-invoke", "commit-msg", gt.client+"/in.txt")59		write(t, gt.client+"/want.txt", tt.want)60		testMain(t, "hook-invoke", "commit-msg", gt.client+"/want.txt")61		got, err := ioutil.ReadFile(gt.client + "/in.txt")62		if err != nil {63			t.Fatal(err)64		}65		want, err := ioutil.ReadFile(gt.client + "/want.txt")66		if err != nil {67			t.Fatal(err)68		}69		// pull off the Change-Id that got appended70		got = got[:len(got)-lenChangeId]71		want = want[:len(want)-lenChangeId]72		if !bytes.Equal(got, want) {73			t.Fatalf("failed to rewrite:\n%s\n\ngot:\n\n%s\n\nwant:\n\n%s\n", tt.in, got, want)74		}75	}76}77func TestHookCommitMsgIssueRepoRewrite(t *testing.T) {78	gt := newGitTest(t)79	defer gt.done()80	msgs := []string{81		// If there's no config, don't rewrite issue references.82		"math/big: catch all the rats\n\nFixes #99999, at least for now\n",83		// Fix the fix-message, even without config84		"math/big: catch all the rats\n\nFixes issue #99999, at least for now\n",85		"math/big: catch all the rats\n\nFixes issue 99999, at least for now\n",86		// Don't forget to write back if Change-Id already exists87		"math/big: catch all the rats\n\nFixes issue #99999, at least for now\n\nChange-Id: Ie77358867e38cf976a0688b6e2f80525dae3891e\n",88	}89	for _, msg := range msgs {90		write(t, gt.client+"/msg.txt", msg)91		testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")92		got := read(t, gt.client+"/msg.txt")93		got = got[:len(got)-lenChangeId]94		const want = "math/big: catch all the rats\n\nFixes #99999, at least for now\n"95		if string(got) != want {96			t.Errorf("issue rewrite failed: got\n\n%s\nwant\n\n%s\nlen %d and %d", got, want, len(got), len(want))97		}98	}99	// Add issuerepo config.100	write(t, gt.client+"/codereview.cfg", "issuerepo: golang/go")101	trun(t, gt.client, "git", "add", "codereview.cfg")102	trun(t, gt.client, "git", "commit", "-m", "add issuerepo codereview config")103	// Look in master rather than origin/master for the config104	savedConfigRef := configRef105	configRef = "master:codereview.cfg"106	cachedConfig = nil107	// Check for the rewrite108	msgs = []string{109		"math/big: catch all the rats\n\nFixes #99999, at least for now\n",110		"math/big: catch all the rats\n\nFixes issue #99999, at least for now\n",111		"math/big: catch all the rats\n\nFixes issue 99999, at least for now\n",112		"math/big: catch all the rats\n\nFixes issue golang/go#99999, at least for now\n",113		"math/big: catch all the rats\n\nFixes issue #99999, at least for now\n\nChange-Id: Ie77358867e38cf976a0688b6e2f80525dae3891e\n",114	}115	for _, msg := range msgs {116		write(t, gt.client+"/msg.txt", msg)117		testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")118		got := read(t, gt.client+"/msg.txt")119		got = got[:len(got)-lenChangeId]120		const want = "math/big: catch all the rats\n\nFixes golang/go#99999, at least for now\n"121		if string(got) != want {122			t.Errorf("issue rewrite failed: got\n\n%s\nwant\n\n%s", got, want)123		}124	}125	// Reset config state126	configRef = savedConfigRef127	cachedConfig = nil128}129func TestHookCommitMsgBranchPrefix(t *testing.T) {130	gt := newGitTest(t)131	defer gt.done()132	checkPrefix := func(prefix string) {133		write(t, gt.client+"/msg.txt", "Test message.\n")134		testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")135		data, err := ioutil.ReadFile(gt.client + "/msg.txt")136		if err != nil {137			t.Fatal(err)138		}139		if !bytes.HasPrefix(data, []byte(prefix)) {140			t.Errorf("after hook-invoke commit-msg on %s, want prefix %q:\n%s", CurrentBranch().Name, prefix, data)141		}142		if i := strings.Index(prefix, "]"); i >= 0 {143			prefix := prefix[:i+1]144			for _, magic := range []string{"fixup!", "squash!"} {145				write(t, gt.client+"/msg.txt", magic+" Test message.\n")146				testMain(t, "hook-invoke", "commit-msg", gt.client+"/msg.txt")147				data, err := ioutil.ReadFile(gt.client + "/msg.txt")148				if err != nil {149					t.Fatal(err)150				}151				if bytes.HasPrefix(data, []byte(prefix)) {152					t.Errorf("after hook-invoke commit-msg on %s with %s, found incorrect prefix %q:\n%s", CurrentBranch().Name, magic, prefix, data)153				}154			}155		}156	}157	// Create server branch and switch to server branch on client.158	// Test that commit hook adds prefix.159	trun(t, gt.server, "git", "checkout", "-b", "dev.cc")160	trun(t, gt.client, "git", "fetch", "-q")161	testMain(t, "change", "dev.cc")162	checkPrefix("[dev.cc] Test message.\n")163	// Work branch with server branch as upstream.164	testMain(t, "change", "ccwork")165	checkPrefix("[dev.cc] Test message.\n")166	// Master has no prefix.167	testMain(t, "change", "master")168	checkPrefix("Test message.\n")169	// Work branch from master has no prefix.170	testMain(t, "change", "work")171	checkPrefix("Test message.\n")172}173func TestHookPreCommit(t *testing.T) {174	gt := newGitTest(t)175	defer gt.done()176	// Write out a non-Go file.177	testMain(t, "change", "mybranch")178	write(t, gt.client+"/msg.txt", "A test message.")179	trun(t, gt.client, "git", "add", "msg.txt")180	testMain(t, "hook-invoke", "pre-commit") // should be no-op181	if err := os.MkdirAll(gt.client+"/test/bench", 0755); err != nil {182		t.Fatal(err)183	}184	write(t, gt.client+"/bad.go", badGo)185	write(t, gt.client+"/good.go", goodGo)186	write(t, gt.client+"/test/bad.go", badGo)187	write(t, gt.client+"/test/good.go", goodGo)188	write(t, gt.client+"/test/bench/bad.go", badGo)189	write(t, gt.client+"/test/bench/good.go", goodGo)190	trun(t, gt.client, "git", "add", ".")191	testMainDied(t, "hook-invoke", "pre-commit")192	testPrintedStderr(t, "gofmt needs to format these files (run 'git gofmt'):",193		"bad.go", "!good.go", fromSlash("!test/bad"), fromSlash("test/bench/bad.go"))194	write(t, gt.client+"/broken.go", brokenGo)195	trun(t, gt.client, "git", "add", "broken.go")196	testMainDied(t, "hook-invoke", "pre-commit")197	testPrintedStderr(t, "gofmt needs to format these files (run 'git gofmt'):",198		"bad.go", "!good.go", fromSlash("!test/bad"), fromSlash("test/bench/bad.go"),199		"gofmt reported errors:", "broken.go")200}201func TestHookChangeGofmt(t *testing.T) {202	// During git change, we run the gofmt check before invoking commit,203	// so we should not see the line about 'git commit' failing.204	// That is, the failure should come from git change, not from205	// the commit hook.206	gt := newGitTest(t)207	defer gt.done()208	gt.work(t)209	// Write out a non-Go file.210	write(t, gt.client+"/bad.go", badGo)211	trun(t, gt.client, "git", "add", ".")212	t.Logf("invoking commit hook explicitly")213	testMainDied(t, "hook-invoke", "pre-commit")214	testPrintedStderr(t, "gofmt needs to format these files (run 'git gofmt'):", "bad.go")215	t.Logf("change without hook installed")216	testCommitMsg = "foo: msg"217	testMainDied(t, "change")218	testPrintedStderr(t, "gofmt needs to format these files (run 'git gofmt'):", "bad.go", "!running: git")219	t.Logf("change with hook installed")220	restore := testInstallHook(t, gt)221	defer restore()222	testCommitMsg = "foo: msg"223	testMainDied(t, "change")224	testPrintedStderr(t, "gofmt needs to format these files (run 'git gofmt'):", "bad.go", "!running: git")225}226func TestHookPreCommitDetachedHead(t *testing.T) {227	// If we're in detached head mode, something special is going on,228	// like git rebase. We disable the gofmt-checking precommit hook,229	// since we expect it would just get in the way at that point.230	// (It also used to crash.)231	gt := newGitTest(t)232	defer gt.done()233	gt.work(t)234	write(t, gt.client+"/bad.go", badGo)235	trun(t, gt.client, "git", "add", ".")236	trun(t, gt.client, "git", "checkout", "HEAD^0")237	testMain(t, "hook-invoke", "pre-commit")238	testNoStdout(t)239	testNoStderr(t)240}241func TestHookPreCommitEnv(t *testing.T) {242	// If $GIT_GOFMT_HOOK == "off", gofmt hook should not complain.243	gt := newGitTest(t)244	defer gt.done()245	gt.work(t)246	write(t, gt.client+"/bad.go", badGo)247	trun(t, gt.client, "git", "add", ".")248	os.Setenv("GIT_GOFMT_HOOK", "off")249	defer os.Unsetenv("GIT_GOFMT_HOOK")250	testMain(t, "hook-invoke", "pre-commit")251	testNoStdout(t)252	testPrintedStderr(t, "git-gofmt-hook disabled by $GIT_GOFMT_HOOK=off")253}254func TestHookPreCommitUnstaged(t *testing.T) {255	gt := newGitTest(t)256	defer gt.done()257	gt.work(t)258	write(t, gt.client+"/bad.go", badGo)259	write(t, gt.client+"/good.go", goodGo)260	// The pre-commit hook is being asked about files in the index.261	// Make sure it is not looking at files in the working tree (current directory) instead.262	// There are three possible kinds of file: good, bad (misformatted), and broken (syntax error).263	// There are also three possible places files live: the most recent commit, the index,264	// and the working tree. We write a sequence of files that cover all possible265	// combination of kinds of file in the various places. For example,266	// good-bad-broken.go is a good file in the most recent commit,267	// a bad file in the index, and a broken file in the working tree.268	// After creating these files, we check that the gofmt hook reports269	// about the index only.270	const N = 3271	name := []string{"good", "bad", "broken"}272	content := []string{goodGo, badGo, brokenGo}273	var wantErr []string274	var allFiles []string275	writeFiles := func(n int) {276		allFiles = nil277		wantErr = nil278		for i := 0; i < N*N*N; i++ {279			// determine n'th digit of 3-digit base-N value i280			j := i281			for k := 0; k < (3 - 1 - n); k++ {282				j /= N283			}284			file := fmt.Sprintf("%s-%s-%s.go", name[i/N/N], name[(i/N)%N], name[i%N])285			allFiles = append(allFiles, file)286			write(t, gt.client+"/"+file, content[j%N])287			switch {288			case strings.Contains(file, "-bad-"):289				wantErr = append(wantErr, "\t"+file+"\n")290			case strings.Contains(file, "-broken-"):291				wantErr = append(wantErr, "\t"+file+":")292			default:293				wantErr = append(wantErr, "!"+file)294			}295		}296	}297	// committed files298	writeFiles(0)299	trun(t, gt.client, "git", "add", ".")300	trun(t, gt.client, "git", "commit", "-m", "msg")301	// staged files302	writeFiles(1)303	trun(t, gt.client, "git", "add", ".")304	// unstaged files305	writeFiles(2)306	wantErr = append(wantErr, "gofmt reported errors", "gofmt needs to format these files")307	testMainDied(t, "hook-invoke", "pre-commit")308	testPrintedStderr(t, wantErr...)309}310func TestHooks(t *testing.T) {311	gt := newGitTest(t)312	defer gt.done()313	gt.removeStubHooks()314	testMain(t, "hooks") // install hooks315	data, err := ioutil.ReadFile(gt.client + "/.git/hooks/commit-msg")316	if err != nil {317		t.Fatalf("hooks did not write commit-msg hook: %v", err)318	}319	if string(data) != "#!/bin/sh\nexec git-codereview hook-invoke commit-msg \"$@\"\n" {320		t.Fatalf("invalid commit-msg hook:\n%s", string(data))321	}322}323func TestHooksOverwriteOldCommitMsg(t *testing.T) {324	gt := newGitTest(t)325	defer gt.done()326	write(t, gt.client+"/.git/hooks/commit-msg", oldCommitMsgHook)327	testMain(t, "hooks") // install hooks328	data, err := ioutil.ReadFile(gt.client + "/.git/hooks/commit-msg")329	if err != nil {330		t.Fatalf("hooks did not write commit-msg hook: %v", err)331	}332	if string(data) == oldCommitMsgHook {333		t.Fatalf("hooks left old commit-msg hook in place")334	}335	if string(data) != "#!/bin/sh\nexec git-codereview hook-invoke commit-msg \"$@\"\n" {336		t.Fatalf("invalid commit-msg hook:\n%s", string(data))337	}338}339func testInstallHook(t *testing.T, gt *gitTest) (restore func()) {340	trun(t, gt.pwd, "go", "build", "-o", gt.client+"/git-codereview")341	path := os.Getenv("PATH")342	os.Setenv("PATH", gt.client+string(filepath.ListSeparator)+path)343	gt.removeStubHooks()344	testMain(t, "hooks") // install hooks345	return func() {346		os.Setenv("PATH", path)347	}348}349func TestHookCommitMsgFromGit(t *testing.T) {350	gt := newGitTest(t)351	defer gt.done()352	restore := testInstallHook(t, gt)353	defer restore()354	testMain(t, "change", "mybranch")355	write(t, gt.client+"/file", "more data")356	trun(t, gt.client, "git", "add", "file")357	trun(t, gt.client, "git", "commit", "-m", "mymsg")358	log := trun(t, gt.client, "git", "log", "-n", "1")359	if !strings.Contains(log, "mymsg") {360		t.Fatalf("did not find mymsg in git log output:\n%s", log)361	}362	// The 4 spaces are because git indents the commit message proper.363	if !strings.Contains(log, "\n    \n    Change-Id:") {364		t.Fatalf("did not find Change-Id in git log output:\n%s", log)365	}366}...

1import (2func Gt(a int, b int) bool {3	if a > b {4	}5}6func main() {7	fmt.Println(Gt(10, 5))8	fmt.Println(Gt(5, 10))9	fmt.Println(Gt(10, 10))10	z01.PrintRune('0')11}

1import (2func main() {3	a := got.Got{"Arya", "Stark"}4	b := got.Got{"Jon", "Snow"}5	c := got.Got{"Daenerys", "Targaryen"}6	d := got.Got{"Tyrion", "Lannister"}7}

1import (2func main() {3	x = got.NewGot(1, 2)4	y = got.NewGot(3, 4)5	z = x.Gt(y)6	fmt.Println(z)7}

1import "fmt"2type got struct {3}4func (g got) Gt() {5	fmt.Println("Winter is coming")6}7func main() {8	g := got{king: "Jon Snow"}9	g.Gt()10}

1import (2func main() {3	g := got.New()4	fmt.Println(g.Gt(1, 2))5	fmt.Println(g.Gt(2, 1))6	fmt.Println(g.Gt(1, 1))7	fmt.Println(g.Gt(1.1, 2.2))8	fmt.Println(g.Gt(2.2, 1.1))9	fmt.Println(g.Gt(1.1, 1.1))10	fmt.Println(g.Gt("a", "b"))11	fmt.Println(g.Gt("b", "a"))12	fmt.Println(g.Gt("a", "a"))13	fmt.Println(g.Gt("a", 1))14	fmt.Println(g.Gt(1, "a"))15	fmt.Println(g.Gt(1, 1.1))16	fmt.Println(g.Gt(1.1, 1))17	fmt.Println(g.Gt("a", 1.1))18	fmt.Println(g.Gt(1.1, "a"))19}

1import "fmt"2import "github.com/gotgo/fw"3import "github.com/gotgo/fw/trace"4import "github.com/gotgo/fw/trace/traceLog"5import "github.com/gotgo/fw/trace/traceConsole"6import "github.com/gotgo/fw/trace/traceNull"7import "github.com/gotgo/fw/trace/traceFile"8import "github.com/gotgo/fw/trace/traceStdout"9import "github.com/gotgo/fw/trace/traceStderr"10import "github.com/gotgo/fw/trace/traceWriter"11import "github.com/gotgo/fw/trace/traceEvent"12import "github.com/gotgo/fw/trace/traceEventFile"13import "github.com/gotgo/fw/trace/traceEventConsole"14import "github.com/gotgo/fw/trace/traceEventWriter"15import "github.com/gotgo/fw/trace/traceEventNull"16import "github.com/gotgo/fw/trace/traceEventStdout"17import "github.com/gotgo/fw/trace/traceEventStderr"18import "github.com/gotgo/fw/trace/traceEventFile"19import "github.com/gotgo/fw/trace/traceEventConsole"20import "github.com/gotgo/fw/trace/traceEventWriter"21import "github.com/gotgo/fw/trace/traceEventNull"22import "github.com/gotgo/fw/trace/traceEventStdout"23import "github.com/gotgo/fw/trace/traceEventStderr"24import "github.com/gotgo/fw/trace/traceEventFile"25import "github.com/gotgo/fw/trace/traceEventConsole"26import "github.com/gotgo/fw/trace/traceEventWriter"27import "github.com/gotgo/fw/trace/traceEventNull"28import "github.com/gotgo/fw/trace/traceEventStdout"29import "github.com/gotgo/fw/trace/traceEventStderr"30import "github.com/gotgo/fw/trace/traceEventFile"31import "github.com/gotgo/fw/trace/traceEventConsole"32import "github.com/gotgo/fw/trace/traceEventWriter"33import "github.com/gotgo/fw/trace/traceEventNull"34import "github.com/gotgo/fw/trace/traceEventStdout"35import "github.com/g