82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testing
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"strings"
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"time"
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)
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type InternalExample struct {
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Name string
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F func()
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Output string
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}
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func RunExamples(examples []InternalExample) (ok bool) {
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ok = true
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var eg InternalExample
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stdout, stderr := os.Stdout, os.Stderr
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defer func() {
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os.Stdout, os.Stderr = stdout, stderr
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if e := recover(); e != nil {
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fmt.Printf("--- FAIL: %s\npanic: %v\n", eg.Name, e)
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os.Exit(1)
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}
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}()
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for _, eg = range examples {
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if *chatty {
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fmt.Printf("=== RUN: %s\n", eg.Name)
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}
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// capture stdout and stderr
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r, w, err := os.Pipe()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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os.Stdout, os.Stderr = w, w
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outC := make(chan string)
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go func() {
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buf := new(bytes.Buffer)
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_, err := io.Copy(buf, r)
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if err != nil {
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fmt.Fprintf(stderr, "testing: copying pipe: %v\n", err)
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os.Exit(1)
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}
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outC <- buf.String()
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}()
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// run example
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t0 := time.Now()
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eg.F()
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dt := time.Now().Sub(t0)
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// close pipe, restore stdout/stderr, get output
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w.Close()
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os.Stdout, os.Stderr = stdout, stderr
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out := <-outC
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// report any errors
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tstr := fmt.Sprintf("(%.2f seconds)", dt.Seconds())
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if g, e := strings.TrimSpace(out), strings.TrimSpace(eg.Output); g != e {
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fmt.Printf("--- FAIL: %s %s\ngot:\n%s\nwant:\n%s\n",
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eg.Name, tstr, g, e)
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ok = false
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} else if *chatty {
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fmt.Printf("--- PASS: %s %s\n", eg.Name, tstr)
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}
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}
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return
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}
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