blob: 64b8136b052e105bb5a9cf2173e92b05bd8cafef [file] [log] [blame]
// 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
}