67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
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// Copyright 2019 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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//go:build !js
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// TODO(@musiol, @odeke-em): re-unify this entire file back into
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// example.go when js/wasm gets an os.Pipe implementation
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// and no longer needs this separation.
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package testing
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import (
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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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func runExample(eg InternalExample) (ok bool) {
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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.
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stdout := os.Stdout
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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 = w
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outC := make(chan string)
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go func() {
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var buf strings.Builder
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_, err := io.Copy(&buf, r)
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r.Close()
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if err != nil {
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fmt.Fprintf(os.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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finished := false
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start := time.Now()
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// Clean up in a deferred call so we can recover if the example panics.
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defer func() {
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timeSpent := time.Since(start)
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// Close pipe, restore stdout, get output.
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w.Close()
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os.Stdout = stdout
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out := <-outC
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err := recover()
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ok = eg.processRunResult(out, timeSpent, finished, err)
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}()
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// Run example.
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eg.F()
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finished = true
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return
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}
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