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// Copyright 2016 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 fastwalk
import (
"bytes"
"flag"
"fmt"
"os"
"path/filepath"
"reflect"
"runtime"
"sort"
"strings"
"sync"
"testing"
)
func formatFileModes(m map[string]os.FileMode) string {
var keys []string
for k := range m {
keys = append(keys, k)
}
sort.Strings(keys)
var buf bytes.Buffer
for _, k := range keys {
fmt.Fprintf(&buf, "%-20s: %v\n", k, m[k])
}
return buf.String()
}
func testFastWalk(t *testing.T, files map[string]string, callback func(path string, typ os.FileMode) error, want map[string]os.FileMode) {
testConfig{
gopathFiles: files,
}.test(t, func(t *goimportTest) {
got := map[string]os.FileMode{}
var mu sync.Mutex
if err := fastWalk(t.gopath, func(path string, typ os.FileMode) error {
mu.Lock()
defer mu.Unlock()
if !strings.HasPrefix(path, t.gopath) {
t.Fatal("bogus prefix on %q, expect %q", path, t.gopath)
}
key := filepath.ToSlash(strings.TrimPrefix(path, t.gopath))
if old, dup := got[key]; dup {
t.Fatalf("callback called twice for key %q: %v -> %v", key, old, typ)
}
got[key] = typ
return callback(path, typ)
}); err != nil {
t.Fatalf("callback returned: %v", err)
}
if !reflect.DeepEqual(got, want) {
t.Errorf("walk mismatch.\n got:\n%v\nwant:\n%v", formatFileModes(got), formatFileModes(want))
}
})
}
func TestFastWalk_Basic(t *testing.T) {
testFastWalk(t, map[string]string{
"foo/foo.go": "one",
"bar/bar.go": "two",
"skip/skip.go": "skip",
},
func(path string, typ os.FileMode) error {
return nil
},
map[string]os.FileMode{
"": os.ModeDir,
"/src": os.ModeDir,
"/src/bar": os.ModeDir,
"/src/bar/bar.go": 0,
"/src/foo": os.ModeDir,
"/src/foo/foo.go": 0,
"/src/skip": os.ModeDir,
"/src/skip/skip.go": 0,
})
}
func TestFastWalk_Symlink(t *testing.T) {
switch runtime.GOOS {
case "windows", "plan9":
t.Skipf("skipping on %s", runtime.GOOS)
}
testFastWalk(t, map[string]string{
"foo/foo.go": "one",
"bar/bar.go": "LINK:../foo.go",
"symdir": "LINK:foo",
},
func(path string, typ os.FileMode) error {
return nil
},
map[string]os.FileMode{
"": os.ModeDir,
"/src": os.ModeDir,
"/src/bar": os.ModeDir,
"/src/bar/bar.go": os.ModeSymlink,
"/src/foo": os.ModeDir,
"/src/foo/foo.go": 0,
"/src/symdir": os.ModeSymlink,
})
}
func TestFastWalk_SkipDir(t *testing.T) {
testFastWalk(t, map[string]string{
"foo/foo.go": "one",
"bar/bar.go": "two",
"skip/skip.go": "skip",
},
func(path string, typ os.FileMode) error {
if typ == os.ModeDir && strings.HasSuffix(path, "skip") {
return filepath.SkipDir
}
return nil
},
map[string]os.FileMode{
"": os.ModeDir,
"/src": os.ModeDir,
"/src/bar": os.ModeDir,
"/src/bar/bar.go": 0,
"/src/foo": os.ModeDir,
"/src/foo/foo.go": 0,
"/src/skip": os.ModeDir,
})
}
func TestFastWalk_TraverseSymlink(t *testing.T) {
switch runtime.GOOS {
case "windows", "plan9":
t.Skipf("skipping on %s", runtime.GOOS)
}
testFastWalk(t, map[string]string{
"foo/foo.go": "one",
"bar/bar.go": "two",
"skip/skip.go": "skip",
"symdir": "LINK:foo",
},
func(path string, typ os.FileMode) error {
if typ == os.ModeSymlink {
return traverseLink
}
return nil
},
map[string]os.FileMode{
"": os.ModeDir,
"/src": os.ModeDir,
"/src/bar": os.ModeDir,
"/src/bar/bar.go": 0,
"/src/foo": os.ModeDir,
"/src/foo/foo.go": 0,
"/src/skip": os.ModeDir,
"/src/skip/skip.go": 0,
"/src/symdir": os.ModeSymlink,
"/src/symdir/foo.go": 0,
})
}
var benchDir = flag.String("benchdir", runtime.GOROOT(), "The directory to scan for BenchmarkFastWalk")
func BenchmarkFastWalk(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
err := fastWalk(*benchDir, func(path string, typ os.FileMode) error { return nil })
if err != nil {
b.Fatal(err)
}
}
}
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