| 1 | // Copyright 2013 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // No testdata on Android. |
| 6 | |
| 7 | //go:build !android |
| 8 | // +build !android |
| 9 | |
| 10 | package main_test |
| 11 | |
| 12 | import ( |
| 13 | "bytes" |
| 14 | "fmt" |
| 15 | "io/ioutil" |
| 16 | "os" |
| 17 | "os/exec" |
| 18 | "path/filepath" |
| 19 | "testing" |
| 20 | |
| 21 | "golang.org/x/tools/internal/testenv" |
| 22 | ) |
| 23 | |
| 24 | const ( |
| 25 | // Data directory, also the package directory for the test. |
| 26 | testdata = "testdata" |
| 27 | ) |
| 28 | |
| 29 | var debug = false // Keeps the rewritten files around if set. |
| 30 | |
| 31 | // Run this shell script, but do it in Go so it can be run by "go test". |
| 32 | // |
| 33 | // replace the word LINE with the line number < testdata/test.go > testdata/test_line.go |
| 34 | // go build -o ./testcover |
| 35 | // ./testcover -mode=count -var=CoverTest -o ./testdata/test_cover.go testdata/test_line.go |
| 36 | // go run ./testdata/main.go ./testdata/test.go |
| 37 | func TestCover(t *testing.T) { |
| 38 | testenv.NeedsTool(t, "go") |
| 39 | |
| 40 | tmpdir, err := ioutil.TempDir("", "TestCover") |
| 41 | if err != nil { |
| 42 | t.Fatal(err) |
| 43 | } |
| 44 | defer func() { |
| 45 | if debug { |
| 46 | fmt.Printf("test files left in %s\n", tmpdir) |
| 47 | } else { |
| 48 | os.RemoveAll(tmpdir) |
| 49 | } |
| 50 | }() |
| 51 | |
| 52 | testcover := filepath.Join(tmpdir, "testcover.exe") |
| 53 | testMain := filepath.Join(tmpdir, "main.go") |
| 54 | testTest := filepath.Join(tmpdir, "test.go") |
| 55 | coverInput := filepath.Join(tmpdir, "test_line.go") |
| 56 | coverOutput := filepath.Join(tmpdir, "test_cover.go") |
| 57 | |
| 58 | for _, f := range []string{testMain, testTest} { |
| 59 | data, err := ioutil.ReadFile(filepath.Join(testdata, filepath.Base(f))) |
| 60 | if err != nil { |
| 61 | t.Fatal(err) |
| 62 | } |
| 63 | if err := ioutil.WriteFile(f, data, 0644); err != nil { |
| 64 | t.Fatal(err) |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | // Read in the test file (testTest) and write it, with LINEs specified, to coverInput. |
| 69 | file, err := ioutil.ReadFile(testTest) |
| 70 | if err != nil { |
| 71 | t.Fatal(err) |
| 72 | } |
| 73 | lines := bytes.Split(file, []byte("\n")) |
| 74 | for i, line := range lines { |
| 75 | lines[i] = bytes.Replace(line, []byte("LINE"), []byte(fmt.Sprint(i+1)), -1) |
| 76 | } |
| 77 | err = ioutil.WriteFile(coverInput, bytes.Join(lines, []byte("\n")), 0666) |
| 78 | if err != nil { |
| 79 | t.Fatal(err) |
| 80 | } |
| 81 | |
| 82 | // go build -o testcover |
| 83 | cmd := exec.Command("go", "build", "-o", testcover) |
| 84 | run(cmd, t) |
| 85 | |
| 86 | // ./testcover -mode=count -var=coverTest -o ./testdata/test_cover.go testdata/test_line.go |
| 87 | cmd = exec.Command(testcover, "-mode=count", "-var=coverTest", "-o", coverOutput, coverInput) |
| 88 | run(cmd, t) |
| 89 | |
| 90 | // defer removal of ./testdata/test_cover.go |
| 91 | if !debug { |
| 92 | defer os.Remove(coverOutput) |
| 93 | } |
| 94 | |
| 95 | // go run ./testdata/main.go ./testdata/test.go |
| 96 | cmd = exec.Command("go", "run", testMain, coverOutput) |
| 97 | run(cmd, t) |
| 98 | } |
| 99 | |
| 100 | func run(c *exec.Cmd, t *testing.T) { |
| 101 | c.Stdout = os.Stdout |
| 102 | c.Stderr = os.Stderr |
| 103 | err := c.Run() |
| 104 | if err != nil { |
| 105 | t.Fatal(err) |
| 106 | } |
| 107 | } |
| 108 |
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