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// Copyright 2013 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 main_test
import (
"bytes"
"flag"
"fmt"
"internal/testenv"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
)
const (
dataDir = "testdata"
binary = "testvet.exe"
)
// We implement TestMain so remove the test binary when all is done.
func TestMain(m *testing.M) {
flag.Parse()
result := m.Run()
os.Remove(binary)
os.Exit(result)
}
func MustHavePerl(t *testing.T) {
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("skipping test: perl not available on %s", runtime.GOOS)
}
}
var (
built = false // We have built the binary.
failed = false // We have failed to build the binary, don't try again.
)
func Build(t *testing.T) {
if built {
return
}
testenv.MustHaveGoBuild(t)
MustHavePerl(t)
if failed {
t.Skip("cannot run on this environment")
}
cmd := exec.Command("go", "build", "-o", binary)
output, err := cmd.CombinedOutput()
if err != nil {
failed = true
fmt.Fprintf(os.Stderr, "%s\n", output)
t.Fatal(err)
}
built = true
}
func Vet(t *testing.T, files []string) {
errchk := filepath.Join(runtime.GOROOT(), "test", "errchk")
flags := []string{
"./" + binary,
"-printfuncs=Warn:1,Warnf:1",
"-test", // TODO: Delete once -shadow is part of -all.
}
cmd := exec.Command(errchk, append(flags, files...)...)
if !run(cmd, t) {
t.Fatal("vet command failed")
}
}
// Run this shell script, but do it in Go so it can be run by "go test".
// go build -o testvet
// $(GOROOT)/test/errchk ./testvet -shadow -printfuncs='Warn:1,Warnf:1' testdata/*.go testdata/*.s
// rm testvet
//
func TestVet(t *testing.T) {
Build(t)
// errchk ./testvet
gos, err := filepath.Glob(filepath.Join(dataDir, "*.go"))
if err != nil {
t.Fatal(err)
}
asms, err := filepath.Glob(filepath.Join(dataDir, "*.s"))
if err != nil {
t.Fatal(err)
}
files := append(gos, asms...)
Vet(t, files)
}
func TestDivergentPackagesExamples(t *testing.T) {
Build(t)
// errchk ./testvet
Vet(t, []string{"testdata/divergent/buf.go", "testdata/divergent/buf_test.go"})
}
func TestIncompleteExamples(t *testing.T) {
Build(t)
// errchk ./testvet
Vet(t, []string{"testdata/incomplete/examples_test.go"})
}
func run(c *exec.Cmd, t *testing.T) bool {
output, err := c.CombinedOutput()
os.Stderr.Write(output)
if err != nil {
t.Fatal(err)
}
// Errchk delights by not returning non-zero status if it finds errors, so we look at the output.
// It prints "BUG" if there is a failure.
if !c.ProcessState.Success() {
return false
}
return !bytes.Contains(output, []byte("BUG"))
}
// TestTags verifies that the -tags argument controls which files to check.
func TestTags(t *testing.T) {
Build(t)
args := []string{
"-tags=testtag",
"-v", // We're going to look at the files it examines.
"testdata/tagtest",
}
cmd := exec.Command("./"+binary, args...)
output, err := cmd.CombinedOutput()
if err != nil {
t.Fatal(err)
}
// file1 has testtag and file2 has !testtag.
if !bytes.Contains(output, []byte(filepath.Join("tagtest", "file1.go"))) {
t.Error("file1 was excluded, should be included")
}
if bytes.Contains(output, []byte(filepath.Join("tagtest", "file2.go"))) {
t.Error("file2 was included, should be excluded")
}
}
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