| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package content |
| |
| import ( |
| "bytes" |
| "errors" |
| "fmt" |
| "io/ioutil" |
| "os" |
| "os/exec" |
| "path/filepath" |
| "strings" |
| "testing" |
| |
| // Keep golang.org/x/tour in our go.mod require list for use during test. |
| _ "golang.org/x/tour/wc" |
| ) |
| |
| // Test that all the .go files inside the content file build |
| // and execute (without checking for output correctness). |
| // Files that contain the string "// +build no-build" are not built. |
| // Files that contain the string "// +build no-run" are not executed. |
| func TestContent(t *testing.T) { |
| if _, err := exec.LookPath("go"); err != nil { |
| t.Skipf("skipping because 'go' executable not available: %v", err) |
| } |
| |
| scratch, err := ioutil.TempDir("", "tour-content-test") |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer os.RemoveAll(scratch) |
| |
| err = filepath.Walk(".", func(path string, fi os.FileInfo, err error) error { |
| if filepath.Ext(path) != ".go" { |
| return nil |
| } |
| if filepath.Base(path) == "content_test.go" { |
| return nil |
| } |
| t.Run(path, func(t *testing.T) { |
| t.Parallel() |
| if err := testSnippet(t, path, scratch); err != nil { |
| t.Errorf("%v: %v", path, err) |
| } |
| }) |
| return nil |
| }) |
| if err != nil { |
| t.Error(err) |
| } |
| } |
| |
| func testSnippet(t *testing.T, path, scratch string) error { |
| b, err := ioutil.ReadFile(path) |
| if err != nil { |
| return err |
| } |
| |
| build := string(bytes.SplitN(b, []byte{'\n'}, 2)[0]) |
| if !strings.HasPrefix(build, "// +build ") { |
| return errors.New("first line is not a +build comment") |
| } |
| if !strings.Contains(build, "OMIT") { |
| return errors.New(`+build comment does not contain "OMIT"`) |
| } |
| |
| if strings.Contains(build, "no-build") { |
| return nil |
| } |
| bin := filepath.Join(scratch, filepath.Base(path)+".exe") |
| out, err := exec.Command("go", "build", "-o", bin, path).CombinedOutput() |
| if err != nil { |
| return fmt.Errorf("build error: %v\noutput:\n%s", err, out) |
| } |
| defer os.Remove(bin) |
| |
| if strings.Contains(build, "no-run") { |
| return nil |
| } |
| out, err = exec.Command(bin).CombinedOutput() |
| if err != nil { |
| return fmt.Errorf("%v\nOutput:\n%s", err, out) |
| } |
| return nil |
| } |