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// +build api_tool
// Copyright 2011 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
import (
"bytes"
"flag"
"fmt"
"go/build"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"testing"
)
var (
updateGolden = flag.Bool("updategolden", false, "update golden files")
)
func TestGolden(t *testing.T) {
td, err := os.Open("testdata/src/pkg")
if err != nil {
t.Fatal(err)
}
fis, err := td.Readdir(0)
if err != nil {
t.Fatal(err)
}
for _, fi := range fis {
if !fi.IsDir() {
continue
}
goldenFile := filepath.Join("testdata", "src", "pkg", fi.Name(), "golden.txt")
w := NewWalker(nil, "testdata/src/pkg")
w.export(w.Import(fi.Name()))
if *updateGolden {
os.Remove(goldenFile)
f, err := os.Create(goldenFile)
if err != nil {
t.Fatal(err)
}
for _, feat := range w.Features() {
fmt.Fprintf(f, "%s\n", feat)
}
f.Close()
}
bs, err := ioutil.ReadFile(goldenFile)
if err != nil {
t.Fatalf("opening golden.txt for package %q: %v", fi.Name(), err)
}
wanted := strings.Split(string(bs), "\n")
sort.Strings(wanted)
for _, feature := range wanted {
if feature == "" {
continue
}
_, ok := w.features[feature]
if !ok {
t.Errorf("package %s: missing feature %q", fi.Name(), feature)
}
delete(w.features, feature)
}
for _, feature := range w.Features() {
t.Errorf("package %s: extra feature not in golden file: %q", fi.Name(), feature)
}
}
}
func TestCompareAPI(t *testing.T) {
tests := []struct {
name string
features, required, optional, exception []string
ok bool // want
out string // want
}{
{
name: "feature added",
features: []string{"A", "B", "C", "D", "E", "F"},
required: []string{"B", "D"},
ok: true,
out: "+A\n+C\n+E\n+F\n",
},
{
name: "feature removed",
features: []string{"C", "A"},
required: []string{"A", "B", "C"},
ok: false,
out: "-B\n",
},
{
name: "feature added then removed",
features: []string{"A", "C"},
optional: []string{"B"},
required: []string{"A", "C"},
ok: true,
out: "±B\n",
},
{
name: "exception removal",
required: []string{"A", "B", "C"},
features: []string{"A", "C"},
exception: []string{"B"},
ok: true,
out: "",
},
{
// http://golang.org/issue/4303
name: "contexts reconverging",
required: []string{
"A",
"pkg syscall (darwin-386), type RawSockaddrInet6 struct",
"pkg syscall (darwin-amd64), type RawSockaddrInet6 struct",
},
features: []string{
"A",
"pkg syscall, type RawSockaddrInet6 struct",
},
ok: true,
out: "+pkg syscall, type RawSockaddrInet6 struct\n",
},
}
for _, tt := range tests {
buf := new(bytes.Buffer)
gotok := compareAPI(buf, tt.features, tt.required, tt.optional, tt.exception)
if gotok != tt.ok {
t.Errorf("%s: ok = %v; want %v", tt.name, gotok, tt.ok)
}
if got := buf.String(); got != tt.out {
t.Errorf("%s: output differs\nGOT:\n%s\nWANT:\n%s", tt.name, got, tt.out)
}
}
}
func BenchmarkAll(b *testing.B) {
stds, err := exec.Command("go", "list", "std").Output()
if err != nil {
b.Fatal(err)
}
b.ResetTimer()
pkgNames := strings.Fields(string(stds))
for _, c := range contexts {
c.Compiler = build.Default.Compiler
}
for i := 0; i < b.N; i++ {
for _, context := range contexts {
w := NewWalker(context, filepath.Join(build.Default.GOROOT, "src/pkg"))
for _, name := range pkgNames {
if name != "unsafe" && !strings.HasPrefix(name, "cmd/") {
w.export(w.Import(name))
}
}
w.Features()
}
}
}
|
