77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
// Copyright 2019 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.
|
|
|
|
//go:build js
|
|
|
|
package testing
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// TODO(@musiol, @odeke-em): unify this code back into
|
|
// example.go when js/wasm gets an os.Pipe implementation.
|
|
func runExample(eg InternalExample) (ok bool) {
|
|
if *chatty {
|
|
fmt.Printf("=== RUN %s\n", eg.Name)
|
|
}
|
|
|
|
// Capture stdout to temporary file. We're not using
|
|
// os.Pipe because it is not supported on js/wasm.
|
|
stdout := os.Stdout
|
|
f := createTempFile(eg.Name)
|
|
os.Stdout = f
|
|
finished := false
|
|
start := time.Now()
|
|
|
|
// Clean up in a deferred call so we can recover if the example panics.
|
|
defer func() {
|
|
timeSpent := time.Since(start)
|
|
|
|
// Restore stdout, get output and remove temporary file.
|
|
os.Stdout = stdout
|
|
var buf strings.Builder
|
|
_, seekErr := f.Seek(0, os.SEEK_SET)
|
|
_, readErr := io.Copy(&buf, f)
|
|
out := buf.String()
|
|
f.Close()
|
|
os.Remove(f.Name())
|
|
if seekErr != nil {
|
|
fmt.Fprintf(os.Stderr, "testing: seek temp file: %v\n", seekErr)
|
|
os.Exit(1)
|
|
}
|
|
if readErr != nil {
|
|
fmt.Fprintf(os.Stderr, "testing: read temp file: %v\n", readErr)
|
|
os.Exit(1)
|
|
}
|
|
|
|
err := recover()
|
|
ok = eg.processRunResult(out, timeSpent, finished, err)
|
|
}()
|
|
|
|
// Run example.
|
|
eg.F()
|
|
finished = true
|
|
return
|
|
}
|
|
|
|
func createTempFile(exampleName string) *os.File {
|
|
for i := 0; ; i++ {
|
|
name := fmt.Sprintf("%s/go-example-stdout-%s-%d.txt", os.TempDir(), exampleName, i)
|
|
f, err := os.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
|
|
if err != nil {
|
|
if os.IsExist(err) {
|
|
continue
|
|
}
|
|
fmt.Fprintf(os.Stderr, "testing: open temp file: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
return f
|
|
}
|
|
}
|