1 files changed, 81 insertions, 0 deletions
diff --git a/src/pkg/os/error_test.go b/src/pkg/os/error_test.go
new file mode 100644
index 000000000..42f846fa3
--- /dev/null
+++ b/src/pkg/os/error_test.go
@@ -0,0 +1,81 @@
+// Copyright 2012 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 os_test
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestErrIsExist(t *testing.T) {
+	f, err := ioutil.TempFile("", "_Go_ErrIsExist")
+	if err != nil {
+		t.Fatalf("open ErrIsExist tempfile: %s", err)
+		return
+	}
+	defer os.Remove(f.Name())
+	defer f.Close()
+	f2, err := os.OpenFile(f.Name(), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
+	if err == nil {
+		f2.Close()
+		t.Fatal("Open should have failed")
+		return
+	}
+	if s := checkErrorPredicate("os.IsExist", os.IsExist, err); s != "" {
+		t.Fatal(s)
+		return
+	}
+}
+
+func testErrNotExist(name string) string {
+	f, err := os.Open(name)
+	if err == nil {
+		f.Close()
+		return "Open should have failed"
+	}
+	if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err); s != "" {
+		return s
+	}
+
+	err = os.Chdir(name)
+	if err == nil {
+		return "Chdir should have failed"
+	}
+	if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err); s != "" {
+		return s
+	}
+	return ""
+}
+
+func TestErrIsNotExist(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "_Go_ErrIsNotExist")
+	if err != nil {
+		t.Fatalf("create ErrIsNotExist tempdir: %s", err)
+		return
+	}
+	defer os.RemoveAll(tmpDir)
+
+	name := filepath.Join(tmpDir, "NotExists")
+	if s := testErrNotExist(name); s != "" {
+		t.Fatal(s)
+		return
+	}
+
+	name = filepath.Join(name, "NotExists2")
+	if s := testErrNotExist(name); s != "" {
+		t.Fatal(s)
+		return
+	}
+}
+
+func checkErrorPredicate(predName string, pred func(error) bool, err error) string {
+	if !pred(err) {
+		return fmt.Sprintf("%s does not work as expected for %#v", predName, err)
+	}
+	return ""
+}