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https://github.com/golang/go
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c28528d489
Test the statistics work as expected for a simple program, which can be extended as needed. This is all a bit meta. R=golang-dev, rsc CC=golang-dev https://golang.org/cl/10392050
88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
// Copyright 2013 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 main_test
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"testing"
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)
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const (
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// Data directory, also the package directory for the test.
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testdata = "testdata"
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// Binaries we compile.
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testcover = "testcover.exe"
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)
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var (
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// Files we use.
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testMain = filepath.Join(testdata, "main.go")
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testTest = filepath.Join(testdata, "test.go")
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coverInput = filepath.Join(testdata, "test_line.go")
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coverOutput = filepath.Join(testdata, "test_cover.go")
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)
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var debug = false // Keeps the rewritten files around if set.
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// Run this shell script, but do it in Go so it can be run by "go test".
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//
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// replace the word LINE with the line number < testdata/test.go > testdata/test_line.go
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// go build -o ./testcover
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// ./testcover -mode=count -var=CoverTest -o ./testdata/test_cover.go testdata/test_line.go
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// go run ./testdata/main.go ./testdata/test.go
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//
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func TestCover(t *testing.T) {
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// Read in the test file (testTest) and write it, with LINEs specified, to coverInput.
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file, err := ioutil.ReadFile(testTest)
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if err != nil {
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t.Fatal(err)
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}
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lines := bytes.Split(file, []byte("\n"))
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for i, line := range lines {
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lines[i] = bytes.Replace(line, []byte("LINE"), []byte(fmt.Sprint(i+1)), -1)
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}
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err = ioutil.WriteFile(coverInput, bytes.Join(lines, []byte("\n")), 0666)
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// defer removal of test_line_go
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if !debug {
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defer os.Remove(coverInput)
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}
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// go build -o testcover
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cmd := exec.Command("go", "build", "-o", testcover)
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run(cmd, t)
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// defer removal of testcover
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defer os.Remove(testcover)
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// ./testcover -mode=count -var=coverTest -o ./testdata/test_cover.go testdata/test_line.go
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cmd = exec.Command(testcover, "-mode=count", "-var=coverTest", "-o", coverOutput, coverInput)
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run(cmd, t)
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// defer removal of ./testdata/test_cover.go
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if !debug {
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defer os.Remove(coverOutput)
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}
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// go run ./testdata/main.go ./testdata/test.go
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cmd = exec.Command("go", "run", testMain, coverOutput)
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run(cmd, t)
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}
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func run(c *exec.Cmd, t *testing.T) {
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c.Stdout = os.Stdout
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c.Stderr = os.Stderr
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err := c.Run()
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if err != nil {
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t.Fatal(err)
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}
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}
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