run_test.go - platform/build/kati - Git at Google

 // Copyright 2020 Google Inc. All rights reserved
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 package kati

 import (
 	"bytes"
 	"flag"
 	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"regexp"
 	"sort"
 	"strings"
 	"testing"

 	"github.com/sergi/go-diff/diffmatchpatch"
 )

 var ninja bool
 var genAllTargets bool

 func init() {
 	// suppress GNU make jobserver magic when calling "make"
 	os.Unsetenv("MAKEFLAGS")
 	os.Unsetenv("MAKELEVEL")
 	os.Setenv("NINJA_STATUS", "NINJACMD: ")

 	flag.BoolVar(&ninja, "ninja", false, "use ninja")
 	flag.BoolVar(&genAllTargets, "all", false, "use --gen_all_targets")
 }

 type normalization struct {
 	regexp  *regexp.Regexp
 	replace string
 }

 var normalizeQuotes = normalization{
 	regexp.MustCompile("([`'\"]|\xe2\x80\x98|\xe2\x80\x99)"), `"`,
 }

 var normalizeMakeLog = []normalization{
 	normalizeQuotes,
 	{regexp.MustCompile(`make(?:\[\d+\])?: (Entering|Leaving) directory[^\n]*\n`), ""},
 	{regexp.MustCompile(`make(?:\[\d+\])?: `), ""},

 	// Normalizations for old/new GNU make.
 	{regexp.MustCompile(" recipe for target "), " commands for target "},
 	{regexp.MustCompile(" recipe commences "), " commands commence "},
 	{regexp.MustCompile("missing rule before recipe."), "missing rule before commands."},
 	{regexp.MustCompile(" (did you mean TAB instead of 8 spaces?)"), ""},
 	{regexp.MustCompile("Extraneous text after"), "extraneous text after"},
 	// Not sure if this is useful
 	{regexp.MustCompile(`\s+Stop\.`), ""},
 	// GNU make 4.0 has this output.
 	{regexp.MustCompile(`Makefile:\d+: commands for target ".*?" failed\n`), ""},
 	// We treat some warnings as errors.
 	{regexp.MustCompile(`/bin/(ba)?sh: line 1: `), ""},
 	// Normalization for "include foo" with C++ kati
 	{regexp.MustCompile(`(: \S+: No such file or directory)\n\*\*\* No rule to make target "[^"]+".`), "$1"},
 	// GNU make 4.0 prints the file:line as part of the error message, e.g.:
 	//    *** [Makefile:4: target] Error 1
 	{regexp.MustCompile(`\[\S+:\d+: `), "["},
 }

 var normalizeMakeNinja = normalization{
 	// We print out some ninja warnings in some tests to match what we expect
 	// ninja to produce. Remove them if we're not testing ninja
 	regexp.MustCompile("ninja: warning: [^\n]+"), "",
 }

 var normalizeKati = []normalization{
 	normalizeQuotes,

 	// kati specific log messages
 	{regexp.MustCompile(`\*kati\*[^\n]*`), ""},
 	{regexp.MustCompile(`c?kati: `), ""},
 	{regexp.MustCompile(`/bin/(ba)?sh: line 1: `), ""},
 	{regexp.MustCompile(`/bin/sh: `), ""},
 	{regexp.MustCompile(`.*: warning for parse error in an unevaluated line: [^\n]*`), ""},
 	{regexp.MustCompile(`([^\n ]+: )?FindEmulator: `), ""},
 	// kati log ifles in find_command.mk
 	{regexp.MustCompile(` (\./+)+kati\.\S+`), ""},
 	// json files in find_command.mk
 	{regexp.MustCompile(` (\./+)+test\S+.json`), ""},
 	// Normalization for "include foo" with Go kati
 	{regexp.MustCompile(`(: )open (\S+): n(o such file or directory)\nNOTE:[^\n]*`), "${1}${2}: N${3}"},
 	// Bionic libc has different error messages than glibc
 	{regexp.MustCompile(`Too many symbolic links encountered`), "Too many levels of symbolic links"},
 }

 var normalizeNinja = []normalization{
 	{regexp.MustCompile(`NINJACMD: [^\n]*\n`), ""},
 	{regexp.MustCompile(`ninja: no work to do\.\n`), ""},
 	{regexp.MustCompile(`ninja: error: (.*, needed by .*),[^\n]*`),
 		"*** No rule to make target ${1}."},
 	{regexp.MustCompile(`ninja: warning: multiple rules generate (.*)\. builds involving this target will not be correct[^\n]*`),
 		"ninja: warning: multiple rules generate ${1}."},
 }

 var normalizeNinjaFail = []normalization{
 	{regexp.MustCompile(`FAILED: ([^\n]+\n/bin/bash)?[^\n]*\n`), "*** [test] Error 1\n"},
 	{regexp.MustCompile(`ninja: [^\n]+\n`), ""},
 }

 var normalizeNinjaIgnoreFail = []normalization{
 	{regexp.MustCompile(`FAILED: ([^\n]+\n/bin/bash)?[^\n]*\n`), ""},
 	{regexp.MustCompile(`ninja: [^\n]+\n`), ""},
 }

 var circularRE = regexp.MustCompile(`(Circular .* dropped\.\n)`)

 func normalize(log []byte, normalizations []normalization) []byte {
 	// We don't care when circular dependency detection happens.
 	ret := []byte{}
 	for _, circ := range circularRE.FindAllSubmatch(log, -1) {
 		ret = append(ret, circ[1]...)
 	}
 	ret = append(ret, circularRE.ReplaceAll(log, []byte{})...)

 	for _, n := range normalizations {
 		ret = n.regexp.ReplaceAll(ret, []byte(n.replace))
 	}
 	return ret
 }

 func runMake(t *testing.T, prefix []string, dir string, silent bool, tc string) string {
 	write := func(f string, data []byte) {
 		suffix := ""
 		if tc != "" {
 			suffix = "_" + tc
 		}
 		if err := ioutil.WriteFile(filepath.Join(dir, f+suffix), data, 0666); err != nil {
 			t.Error(err)
 		}
 	}

 	args := append(prefix, "make")
 	if silent {
 		args = append(args, "-s")
 	}
 	if tc != "" {
 		args = append(args, tc)
 	}
 	args = append(args, "SHELL=/bin/bash")

 	cmd := exec.Command(args[0], args[1:]...)
 	cmd.Dir = dir
 	output, _ := cmd.CombinedOutput()
 	write("stdout", output)

 	output = normalize(output, normalizeMakeLog)
 	if !ninja {
 		output = normalize(output, []normalization{normalizeMakeNinja})
 	}

 	write("stdout_normalized", output)
 	return string(output)
 }

 func runKati(t *testing.T, test, dir string, silent bool, tc string) string {
 	write := func(f string, data []byte) {
 		suffix := ""
 		if tc != "" {
 			suffix = "_" + tc
 		}
 		if err := ioutil.WriteFile(filepath.Join(dir, f+suffix), data, 0666); err != nil {
 			t.Error(err)
 		}
 	}

 	cmd := exec.Command("../../../ckati", "--use_find_emulator")
 	if ninja {
 		cmd.Args = append(cmd.Args, "--ninja")
 	}
 	if genAllTargets {
 		cmd.Args = append(cmd.Args, "--gen_all_targets")
 	}
 	if silent {
 		cmd.Args = append(cmd.Args, "-s")
 	}
 	cmd.Args = append(cmd.Args, "SHELL=/bin/bash")
 	if tc != "" && (!genAllTargets || strings.Contains(test, "makecmdgoals")) {
 		cmd.Args = append(cmd.Args, tc)
 	}
 	cmd.Dir = dir
 	output, err := cmd.CombinedOutput()
 	write("stdout", output)
 	if err != nil {
 		output := normalize(output, normalizeKati)
 		write("stdout_normalized", output)
 		return string(output)
 	}

 	if ninja {
 		ninjaCmd := exec.Command("./ninja.sh", "-j1", "-v")
 		if genAllTargets && tc != "" {
 			ninjaCmd.Args = append(ninjaCmd.Args, tc)
 		}
 		ninjaCmd.Dir = dir
 		ninjaOutput, _ := ninjaCmd.CombinedOutput()
 		write("stdout_ninja", ninjaOutput)
 		ninjaOutput = normalize(ninjaOutput, normalizeNinja)
 		if test == "err_error_in_recipe.mk" {
 			ninjaOutput = normalize(ninjaOutput, normalizeNinjaIgnoreFail)
 		} else if strings.HasPrefix(test, "fail_") {
 			ninjaOutput = normalize(ninjaOutput, normalizeNinjaFail)
 		}
 		write("stdout_ninja_normalized", ninjaOutput)
 		output = append(output, ninjaOutput...)
 	}

 	output = normalize(output, normalizeKati)
 	write("stdout_normalized", output)
 	return string(output)
 }

 func runKatiInScript(t *testing.T, script, dir string, isNinjaTest bool) string {
 	write := func(f string, data []byte) {
 		if err := ioutil.WriteFile(filepath.Join(dir, f), data, 0666); err != nil {
 			t.Error(err)
 		}
 	}

 	args := []string{"bash", script, "../../../ckati"}
 	if isNinjaTest {
 		args = append(args, "--ninja", "--regen")
 	}
 	args = append(args, "SHELL=/bin/bash")

 	var stderrb bytes.Buffer
 	cmd := exec.Command(args[0], args[1:]...)
 	cmd.Dir = dir
 	cmd.Stderr = &stderrb
 	output, _ := cmd.Output()
 	write("stdout", output)
 	write("stderr", stderrb.Bytes())
 	if isNinjaTest {
 		output = normalize(output, normalizeNinja)
 	}
 	output = normalize(output, normalizeKati)
 	write("stdout_normalized", output)
 	return string(output)
 }

 func inList(list []string, item string) bool {
 	for _, i := range list {
 		if item == i {
 			return true
 		}
 	}
 	return false
 }

 func diffLists(a, b []string) (onlyA []string, onlyB []string) {
 	for _, i := range a {
 		if !inList(b, i) {
 			onlyA = append(onlyA, i)
 		}
 	}
 	for _, i := range b {
 		if !inList(a, i) {
 			onlyB = append(onlyB, i)
 		}
 	}
 	return
 }

 func outputFiles(t *testing.T, dir string) []string {
 	ret := []string{}
 	files, err := ioutil.ReadDir(dir)
 	if err != nil {
 		t.Fatal(err)
 	}
 	ignoreFiles := []string{
 		".", "..", "Makefile", "build.ninja", "env.sh", "ninja.sh", "gmon.out", "submake",
 	}
 	for _, fi := range files {
 		name := fi.Name()
 		if inList(ignoreFiles, name) ||
 			strings.HasPrefix(name, ".") ||
 			strings.HasSuffix(name, ".json") ||
 			strings.HasPrefix(name, "kati") ||
 			strings.HasPrefix(name, "stdout") {
 			continue
 		}
 		ret = append(ret, fi.Name())
 	}
 	return ret
 }

 var testcaseRE = regexp.MustCompile(`^test\d*`)

 func uniqueTestcases(c []byte) []string {
 	seen := map[string]bool{}
 	ret := []string{}
 	for _, line := range bytes.Split(c, []byte("\n")) {
 		line := string(line)
 		s := testcaseRE.FindString(line)
 		if s == "" {
 			continue
 		}
 		if _, ok := seen[s]; ok {
 			continue
 		}
 		seen[s] = true
 		ret = append(ret, s)
 	}
 	sort.Strings(ret)
 	if len(ret) == 0 {
 		return []string{""}
 	}
 	return ret
 }

 var todoRE = regexp.MustCompile(`^# TODO(?:\(([-a-z|]+)(?:/([-a-z0-9|]+))?\))?`)

 func isExpectedFailure(c []byte, tc string) bool {
 	for _, line := range bytes.Split(c, []byte("\n")) {
 		line := string(line)
 		if !strings.HasPrefix(line, "#!") && !strings.HasPrefix(line, "# TODO") {
 			break
 		}

 		todo := todoRE.FindStringSubmatch(line)
 		if todo == nil {
 			continue
 		}

 		if todo[1] == "" {
 			return true
 		}

 		todos := strings.Split(todo[1], "|")
 		if (inList(todos, "ninja") && ninja) ||
 			(inList(todos, "ninja-genall") && ninja && genAllTargets) ||
 			(inList(todos, "all")) {

 			if todo[2] == "" {
 				return true
 			}
 			tcs := strings.Split(todo[2], "|")
 			if inList(tcs, tc) {
 				return true
 			}
 		}
 	}
 	return false
 }

 func TestKati(t *testing.T) {
 	if _, err := os.Stat("ckati"); err != nil {
 		t.Fatalf("ckati must be built before testing: %s", err)
 	}
 	if ninja {
 		if _, err := exec.LookPath("ninja"); err != nil {
 			t.Fatal(err)
 		}
 	}

 	out, _ := filepath.Abs("out")
 	files, err := ioutil.ReadDir("testcase")
 	if err != nil {
 		t.Fatal(err)
 	}
 	for _, fi := range files {
 		name := fi.Name()

 		isMkTest := strings.HasSuffix(name, ".mk")
 		isShTest := strings.HasSuffix(name, ".sh")
 		if strings.HasPrefix(name, ".") || !(isMkTest || isShTest) {
 			continue
 		}

 		t.Run(name, func(t *testing.T) {
 			t.Parallel()

 			c, err := ioutil.ReadFile(filepath.Join("testcase", name))
 			if err != nil {
 				t.Fatal(err)
 			}

 			out := filepath.Join(out, name)
 			if err := os.RemoveAll(out); err != nil {
 				t.Fatal(err)
 			}
 			outMake := filepath.Join(out, "make")
 			outKati := filepath.Join(out, "kati")
 			if err := os.MkdirAll(outMake, 0777); err != nil {
 				t.Fatal(err)
 			}
 			if err := os.MkdirAll(outKati, 0777); err != nil {
 				t.Fatal(err)
 			}

 			testcases := []string{""}
 			expected := map[string]string{}
 			expectedFiles := map[string][]string{}
 			expectedFailures := map[string]bool{}
 			got := map[string]string{}
 			gotFiles := map[string][]string{}

 			if isMkTest {
 				setup := func(dir string) {
 					if err = ioutil.WriteFile(filepath.Join(dir, "Makefile"), c, 0666); err != nil {
 						t.Fatal(err)
 					}
 					os.Symlink("../../../testcase/submake", filepath.Join(dir, "submake"))
 				}
 				setup(outMake)
 				setup(outKati)

 				testcases = uniqueTestcases(c)

 				isSilent := strings.HasPrefix(name, "submake_")

 				for _, tc := range testcases {
 					expected[tc] = runMake(t, nil, outMake, ninja || isSilent, tc)
 					expectedFiles[tc] = outputFiles(t, outMake)
 					expectedFailures[tc] = isExpectedFailure(c, tc)
 				}

 				for _, tc := range testcases {
 					got[tc] = runKati(t, name, outKati, isSilent, tc)
 					gotFiles[tc] = outputFiles(t, outKati)
 				}
 			} else if isShTest {
 				isNinjaTest := strings.HasPrefix(name, "ninja_")
 				if isNinjaTest && !ninja {
 					t.SkipNow()
 				}

 				scriptName := "../../../testcase/" + name

 				expected[""] = runMake(t, []string{"bash", scriptName}, outMake, isNinjaTest, "")
 				expectedFailures[""] = isExpectedFailure(c, "")

 				got[""] = runKatiInScript(t, scriptName, outKati, isNinjaTest)
 			}

 			check := func(t *testing.T, m, k string, mFiles, kFiles []string, expectFail bool) {
 				if strings.Contains(m, "FAIL") {
 					t.Fatalf("Make returned 'FAIL':\n%q", m)
 				}

 				if !expectFail && m != k {
 					dmp := diffmatchpatch.New()
 					diffs := dmp.DiffMain(k, m, true)
 					diffs = dmp.DiffCleanupSemantic(diffs)
 					t.Errorf("Different output from kati (red) to the expected value from make (green):\n%s",
 						dmp.DiffPrettyText(diffs))
 				} else if expectFail && m == k {
 					t.Errorf("Expected failure, but output is the same")
 				}

 				if !expectFail {
 					onlyMake, onlyKati := diffLists(mFiles, kFiles)
 					if len(onlyMake) > 0 {
 						t.Errorf("Files only created by Make:\n%q", onlyMake)
 					}
 					if len(onlyKati) > 0 {
 						t.Errorf("Files only created by Kati:\n%q", onlyKati)
 					}
 				}
 			}

 			for _, tc := range testcases {
 				if tc == "" || len(testcases) == 1 {
 					check(t, expected[tc], got[tc], expectedFiles[tc], gotFiles[tc], expectedFailures[tc])
 				} else {
 					t.Run(tc, func(t *testing.T) {
 						check(t, expected[tc], got[tc], expectedFiles[tc], gotFiles[tc], expectedFailures[tc])
 					})
 				}
 			}
 		})
 	}
 }
	// Copyright 2020 Google Inc. All rights reserved
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	package kati

	import (
	"bytes"
	"flag"
	"io/ioutil"
	"os"
	"os/exec"
	"path/filepath"
	"regexp"
	"sort"
	"strings"
	"testing"

	"github.com/sergi/go-diff/diffmatchpatch"
	)

	var ninja bool
	var genAllTargets bool

	func init() {
	// suppress GNU make jobserver magic when calling "make"
	os.Unsetenv("MAKEFLAGS")
	os.Unsetenv("MAKELEVEL")
	os.Setenv("NINJA_STATUS", "NINJACMD: ")

	flag.BoolVar(&ninja, "ninja", false, "use ninja")
	flag.BoolVar(&genAllTargets, "all", false, "use --gen_all_targets")
	}

	type normalization struct {
	regexp *regexp.Regexp
	replace string
	}

	var normalizeQuotes = normalization{
	regexp.MustCompile("([`'\"]\|\xe2\x80\x98\|\xe2\x80\x99)"), `"`,
	}

	var normalizeMakeLog = []normalization{
	normalizeQuotes,
	{regexp.MustCompile(`make(?:\[\d+\])?: (Entering\|Leaving) directory[^\n]*\n`), ""},
	{regexp.MustCompile(`make(?:\[\d+\])?: `), ""},

	// Normalizations for old/new GNU make.
	{regexp.MustCompile(" recipe for target "), " commands for target "},
	{regexp.MustCompile(" recipe commences "), " commands commence "},
	{regexp.MustCompile("missing rule before recipe."), "missing rule before commands."},
	{regexp.MustCompile(" (did you mean TAB instead of 8 spaces?)"), ""},
	{regexp.MustCompile("Extraneous text after"), "extraneous text after"},
	// Not sure if this is useful
	{regexp.MustCompile(`\s+Stop\.`), ""},
	// GNU make 4.0 has this output.
	{regexp.MustCompile(`Makefile:\d+: commands for target ".*?" failed\n`), ""},
	// We treat some warnings as errors.
	{regexp.MustCompile(`/bin/(ba)?sh: line 1: `), ""},
	// Normalization for "include foo" with C++ kati
	{regexp.MustCompile(`(: \S+: No such file or directory)\n\\\* No rule to make target "[^"]+".`), "$1"},
	// GNU make 4.0 prints the file:line as part of the error message, e.g.:
	// *** [Makefile:4: target] Error 1
	{regexp.MustCompile(`\[\S+:\d+: `), "["},
	}

	var normalizeMakeNinja = normalization{
	// We print out some ninja warnings in some tests to match what we expect
	// ninja to produce. Remove them if we're not testing ninja
	regexp.MustCompile("ninja: warning: [^\n]+"), "",
	}

	var normalizeKati = []normalization{
	normalizeQuotes,

	// kati specific log messages
	{regexp.MustCompile(`\kati\[^\n]*`), ""},
	{regexp.MustCompile(`c?kati: `), ""},
	{regexp.MustCompile(`/bin/(ba)?sh: line 1: `), ""},
	{regexp.MustCompile(`/bin/sh: `), ""},
	{regexp.MustCompile(`.: warning for parse error in an unevaluated line: [^\n]`), ""},
	{regexp.MustCompile(`([^\n ]+: )?FindEmulator: `), ""},
	// kati log ifles in find_command.mk
	{regexp.MustCompile(` (\./+)+kati\.\S+`), ""},
	// json files in find_command.mk
	{regexp.MustCompile(` (\./+)+test\S+.json`), ""},
	// Normalization for "include foo" with Go kati
	{regexp.MustCompile(`(: )open (\S+): n(o such file or directory)\nNOTE:[^\n]*`), "${1}${2}: N${3}"},
	// Bionic libc has different error messages than glibc
	{regexp.MustCompile(`Too many symbolic links encountered`), "Too many levels of symbolic links"},
	}

	var normalizeNinja = []normalization{
	{regexp.MustCompile(`NINJACMD: [^\n]*\n`), ""},
	{regexp.MustCompile(`ninja: no work to do\.\n`), ""},
	{regexp.MustCompile(`ninja: error: (., needed by .),[^\n]*`),
	"*** No rule to make target ${1}."},
	{regexp.MustCompile(`ninja: warning: multiple rules generate (.)\. builds involving this target will not be correct[^\n]`),
	"ninja: warning: multiple rules generate ${1}."},
	}

	var normalizeNinjaFail = []normalization{
	{regexp.MustCompile(`FAILED: ([^\n]+\n/bin/bash)?[^\n]\n`), "** [test] Error 1\n"},
	{regexp.MustCompile(`ninja: [^\n]+\n`), ""},
	}

	var normalizeNinjaIgnoreFail = []normalization{
	{regexp.MustCompile(`FAILED: ([^\n]+\n/bin/bash)?[^\n]*\n`), ""},
	{regexp.MustCompile(`ninja: [^\n]+\n`), ""},
	}

	var circularRE = regexp.MustCompile(`(Circular .* dropped\.\n)`)

	func normalize(log []byte, normalizations []normalization) []byte {
	// We don't care when circular dependency detection happens.
	ret := []byte{}
	for _, circ := range circularRE.FindAllSubmatch(log, -1) {
	ret = append(ret, circ[1]...)
	}
	ret = append(ret, circularRE.ReplaceAll(log, []byte{})...)

	for _, n := range normalizations {
	ret = n.regexp.ReplaceAll(ret, []byte(n.replace))
	}
	return ret
	}

	func runMake(t *testing.T, prefix []string, dir string, silent bool, tc string) string {
	write := func(f string, data []byte) {
	suffix := ""
	if tc != "" {
	suffix = "_" + tc
	}
	if err := ioutil.WriteFile(filepath.Join(dir, f+suffix), data, 0666); err != nil {
	t.Error(err)
	}
	}

	args := append(prefix, "make")
	if silent {
	args = append(args, "-s")
	}
	if tc != "" {
	args = append(args, tc)
	}
	args = append(args, "SHELL=/bin/bash")

	cmd := exec.Command(args[0], args[1:]...)
	cmd.Dir = dir
	output, _ := cmd.CombinedOutput()
	write("stdout", output)

	output = normalize(output, normalizeMakeLog)
	if !ninja {
	output = normalize(output, []normalization{normalizeMakeNinja})
	}

	write("stdout_normalized", output)
	return string(output)
	}

	func runKati(t *testing.T, test, dir string, silent bool, tc string) string {
	write := func(f string, data []byte) {
	suffix := ""
	if tc != "" {
	suffix = "_" + tc
	}
	if err := ioutil.WriteFile(filepath.Join(dir, f+suffix), data, 0666); err != nil {
	t.Error(err)
	}
	}

	cmd := exec.Command("../../../ckati", "--use_find_emulator")
	if ninja {
	cmd.Args = append(cmd.Args, "--ninja")
	}
	if genAllTargets {
	cmd.Args = append(cmd.Args, "--gen_all_targets")
	}
	if silent {
	cmd.Args = append(cmd.Args, "-s")
	}
	cmd.Args = append(cmd.Args, "SHELL=/bin/bash")
	if tc != "" && (!genAllTargets \|\| strings.Contains(test, "makecmdgoals")) {
	cmd.Args = append(cmd.Args, tc)
	}
	cmd.Dir = dir
	output, err := cmd.CombinedOutput()
	write("stdout", output)
	if err != nil {
	output := normalize(output, normalizeKati)
	write("stdout_normalized", output)
	return string(output)
	}

	if ninja {
	ninjaCmd := exec.Command("./ninja.sh", "-j1", "-v")
	if genAllTargets && tc != "" {
	ninjaCmd.Args = append(ninjaCmd.Args, tc)
	}
	ninjaCmd.Dir = dir
	ninjaOutput, _ := ninjaCmd.CombinedOutput()
	write("stdout_ninja", ninjaOutput)
	ninjaOutput = normalize(ninjaOutput, normalizeNinja)
	if test == "err_error_in_recipe.mk" {
	ninjaOutput = normalize(ninjaOutput, normalizeNinjaIgnoreFail)
	} else if strings.HasPrefix(test, "fail_") {
	ninjaOutput = normalize(ninjaOutput, normalizeNinjaFail)
	}
	write("stdout_ninja_normalized", ninjaOutput)
	output = append(output, ninjaOutput...)
	}

	output = normalize(output, normalizeKati)
	write("stdout_normalized", output)
	return string(output)
	}

	func runKatiInScript(t *testing.T, script, dir string, isNinjaTest bool) string {
	write := func(f string, data []byte) {
	if err := ioutil.WriteFile(filepath.Join(dir, f), data, 0666); err != nil {
	t.Error(err)
	}
	}

	args := []string{"bash", script, "../../../ckati"}
	if isNinjaTest {
	args = append(args, "--ninja", "--regen")
	}
	args = append(args, "SHELL=/bin/bash")

	var stderrb bytes.Buffer
	cmd := exec.Command(args[0], args[1:]...)
	cmd.Dir = dir
	cmd.Stderr = &stderrb
	output, _ := cmd.Output()
	write("stdout", output)
	write("stderr", stderrb.Bytes())
	if isNinjaTest {
	output = normalize(output, normalizeNinja)
	}
	output = normalize(output, normalizeKati)
	write("stdout_normalized", output)
	return string(output)
	}

	func inList(list []string, item string) bool {
	for _, i := range list {
	if item == i {
	return true
	}
	}
	return false
	}

	func diffLists(a, b []string) (onlyA []string, onlyB []string) {
	for _, i := range a {
	if !inList(b, i) {
	onlyA = append(onlyA, i)
	}
	}
	for _, i := range b {
	if !inList(a, i) {
	onlyB = append(onlyB, i)
	}
	}
	return
	}

	func outputFiles(t *testing.T, dir string) []string {
	ret := []string{}
	files, err := ioutil.ReadDir(dir)
	if err != nil {
	t.Fatal(err)
	}
	ignoreFiles := []string{
	".", "..", "Makefile", "build.ninja", "env.sh", "ninja.sh", "gmon.out", "submake",
	}
	for _, fi := range files {
	name := fi.Name()
	if inList(ignoreFiles, name) \|\|
	strings.HasPrefix(name, ".") \|\|
	strings.HasSuffix(name, ".json") \|\|
	strings.HasPrefix(name, "kati") \|\|
	strings.HasPrefix(name, "stdout") {
	continue
	}
	ret = append(ret, fi.Name())
	}
	return ret
	}

	var testcaseRE = regexp.MustCompile(`^test\d*`)

	func uniqueTestcases(c []byte) []string {
	seen := map[string]bool{}
	ret := []string{}
	for _, line := range bytes.Split(c, []byte("\n")) {
	line := string(line)
	s := testcaseRE.FindString(line)
	if s == "" {
	continue
	}
	if _, ok := seen[s]; ok {
	continue
	}
	seen[s] = true
	ret = append(ret, s)
	}
	sort.Strings(ret)
	if len(ret) == 0 {
	return []string{""}
	}
	return ret
	}

	var todoRE = regexp.MustCompile(`^# TODO(?:\(([-a-z\|]+)(?:/([-a-z0-9\|]+))?\))?`)

	func isExpectedFailure(c []byte, tc string) bool {
	for _, line := range bytes.Split(c, []byte("\n")) {
	line := string(line)
	if !strings.HasPrefix(line, "#!") && !strings.HasPrefix(line, "# TODO") {
	break
	}

	todo := todoRE.FindStringSubmatch(line)
	if todo == nil {
	continue
	}

	if todo[1] == "" {
	return true
	}

	todos := strings.Split(todo[1], "\|")
	if (inList(todos, "ninja") && ninja) \|\|
	(inList(todos, "ninja-genall") && ninja && genAllTargets) \|\|
	(inList(todos, "all")) {

	if todo[2] == "" {
	return true
	}
	tcs := strings.Split(todo[2], "\|")
	if inList(tcs, tc) {
	return true
	}
	}
	}
	return false
	}

	func TestKati(t *testing.T) {
	if _, err := os.Stat("ckati"); err != nil {
	t.Fatalf("ckati must be built before testing: %s", err)
	}
	if ninja {
	if _, err := exec.LookPath("ninja"); err != nil {
	t.Fatal(err)
	}
	}

	out, _ := filepath.Abs("out")
	files, err := ioutil.ReadDir("testcase")
	if err != nil {
	t.Fatal(err)
	}
	for _, fi := range files {
	name := fi.Name()

	isMkTest := strings.HasSuffix(name, ".mk")
	isShTest := strings.HasSuffix(name, ".sh")
	if strings.HasPrefix(name, ".") \|\| !(isMkTest \|\| isShTest) {
	continue
	}

	t.Run(name, func(t *testing.T) {
	t.Parallel()

	c, err := ioutil.ReadFile(filepath.Join("testcase", name))
	if err != nil {
	t.Fatal(err)
	}

	out := filepath.Join(out, name)
	if err := os.RemoveAll(out); err != nil {
	t.Fatal(err)
	}
	outMake := filepath.Join(out, "make")
	outKati := filepath.Join(out, "kati")
	if err := os.MkdirAll(outMake, 0777); err != nil {
	t.Fatal(err)
	}
	if err := os.MkdirAll(outKati, 0777); err != nil {
	t.Fatal(err)
	}

	testcases := []string{""}
	expected := map[string]string{}
	expectedFiles := map[string][]string{}
	expectedFailures := map[string]bool{}
	got := map[string]string{}
	gotFiles := map[string][]string{}

	if isMkTest {
	setup := func(dir string) {
	if err = ioutil.WriteFile(filepath.Join(dir, "Makefile"), c, 0666); err != nil {
	t.Fatal(err)
	}
	os.Symlink("../../../testcase/submake", filepath.Join(dir, "submake"))
	}
	setup(outMake)
	setup(outKati)

	testcases = uniqueTestcases(c)

	isSilent := strings.HasPrefix(name, "submake_")

	for _, tc := range testcases {
	expected[tc] = runMake(t, nil, outMake, ninja \|\| isSilent, tc)
	expectedFiles[tc] = outputFiles(t, outMake)
	expectedFailures[tc] = isExpectedFailure(c, tc)
	}

	for _, tc := range testcases {
	got[tc] = runKati(t, name, outKati, isSilent, tc)
	gotFiles[tc] = outputFiles(t, outKati)
	}
	} else if isShTest {
	isNinjaTest := strings.HasPrefix(name, "ninja_")
	if isNinjaTest && !ninja {
	t.SkipNow()
	}

	scriptName := "../../../testcase/" + name

	expected[""] = runMake(t, []string{"bash", scriptName}, outMake, isNinjaTest, "")
	expectedFailures[""] = isExpectedFailure(c, "")

	got[""] = runKatiInScript(t, scriptName, outKati, isNinjaTest)
	}

	check := func(t *testing.T, m, k string, mFiles, kFiles []string, expectFail bool) {
	if strings.Contains(m, "FAIL") {
	t.Fatalf("Make returned 'FAIL':\n%q", m)
	}

	if !expectFail && m != k {
	dmp := diffmatchpatch.New()
	diffs := dmp.DiffMain(k, m, true)
	diffs = dmp.DiffCleanupSemantic(diffs)
	t.Errorf("Different output from kati (red) to the expected value from make (green):\n%s",
	dmp.DiffPrettyText(diffs))
	} else if expectFail && m == k {
	t.Errorf("Expected failure, but output is the same")
	}

	if !expectFail {
	onlyMake, onlyKati := diffLists(mFiles, kFiles)
	if len(onlyMake) > 0 {
	t.Errorf("Files only created by Make:\n%q", onlyMake)
	}
	if len(onlyKati) > 0 {
	t.Errorf("Files only created by Kati:\n%q", onlyKati)
	}
	}
	}

	for _, tc := range testcases {
	if tc == "" \|\| len(testcases) == 1 {
	check(t, expected[tc], got[tc], expectedFiles[tc], gotFiles[tc], expectedFailures[tc])
	} else {
	t.Run(tc, func(t *testing.T) {
	check(t, expected[tc], got[tc], expectedFiles[tc], gotFiles[tc], expectedFailures[tc])
	})
	}
	}
	})
	}
	}