1// Copyright 2012 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package os_test
6
7import (
8	"fmt"
9	"io/ioutil"
10	"os"
11	"path/filepath"
12	"testing"
13)
14
15func TestErrIsExist(t *testing.T) {
16	f, err := ioutil.TempFile("", "_Go_ErrIsExist")
17	if err != nil {
18		t.Fatalf("open ErrIsExist tempfile: %s", err)
19		return
20	}
21	defer os.Remove(f.Name())
22	defer f.Close()
23	f2, err := os.OpenFile(f.Name(), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
24	if err == nil {
25		f2.Close()
26		t.Fatal("Open should have failed")
27		return
28	}
29	if s := checkErrorPredicate("os.IsExist", os.IsExist, err); s != "" {
30		t.Fatal(s)
31		return
32	}
33}
34
35func testErrNotExist(name string) string {
36	f, err := os.Open(name)
37	if err == nil {
38		f.Close()
39		return "Open should have failed"
40	}
41	if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err); s != "" {
42		return s
43	}
44
45	err = os.Chdir(name)
46	if err == nil {
47		return "Chdir should have failed"
48	}
49	if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err); s != "" {
50		return s
51	}
52	return ""
53}
54
55func TestErrIsNotExist(t *testing.T) {
56	tmpDir, err := ioutil.TempDir("", "_Go_ErrIsNotExist")
57	if err != nil {
58		t.Fatalf("create ErrIsNotExist tempdir: %s", err)
59		return
60	}
61	defer os.RemoveAll(tmpDir)
62
63	name := filepath.Join(tmpDir, "NotExists")
64	if s := testErrNotExist(name); s != "" {
65		t.Fatal(s)
66		return
67	}
68
69	name = filepath.Join(name, "NotExists2")
70	if s := testErrNotExist(name); s != "" {
71		t.Fatal(s)
72		return
73	}
74}
75
76func checkErrorPredicate(predName string, pred func(error) bool, err error) string {
77	if !pred(err) {
78		return fmt.Sprintf("%s does not work as expected for %#v", predName, err)
79	}
80	return ""
81}
82
83var isExistTests = []struct {
84	err   error
85	is    bool
86	isnot bool
87}{
88	{&os.PathError{Err: os.ErrInvalid}, false, false},
89	{&os.PathError{Err: os.ErrPermission}, false, false},
90	{&os.PathError{Err: os.ErrExist}, true, false},
91	{&os.PathError{Err: os.ErrNotExist}, false, true},
92	{&os.LinkError{Err: os.ErrInvalid}, false, false},
93	{&os.LinkError{Err: os.ErrPermission}, false, false},
94	{&os.LinkError{Err: os.ErrExist}, true, false},
95	{&os.LinkError{Err: os.ErrNotExist}, false, true},
96	{&os.SyscallError{Err: os.ErrNotExist}, false, true},
97	{&os.SyscallError{Err: os.ErrExist}, true, false},
98	{nil, false, false},
99}
100
101func TestIsExist(t *testing.T) {
102	for _, tt := range isExistTests {
103		if is := os.IsExist(tt.err); is != tt.is {
104			t.Errorf("os.IsExist(%T %v) = %v, want %v", tt.err, tt.err, is, tt.is)
105		}
106		if isnot := os.IsNotExist(tt.err); isnot != tt.isnot {
107			t.Errorf("os.IsNotExist(%T %v) = %v, want %v", tt.err, tt.err, isnot, tt.isnot)
108		}
109	}
110}
111
112var isPermissionTests = []struct {
113	err  error
114	want bool
115}{
116	{nil, false},
117	{&os.PathError{Err: os.ErrPermission}, true},
118	{&os.SyscallError{Err: os.ErrPermission}, true},
119}
120
121func TestIsPermission(t *testing.T) {
122	for _, tt := range isPermissionTests {
123		if got := os.IsPermission(tt.err); got != tt.want {
124			t.Errorf("os.IsPermission(%#v) = %v; want %v", tt.err, got, tt.want)
125		}
126	}
127}
128
129func TestErrPathNUL(t *testing.T) {
130	f, err := ioutil.TempFile("", "_Go_ErrPathNUL\x00")
131	if err == nil {
132		f.Close()
133		t.Fatal("TempFile should have failed")
134	}
135	f, err = ioutil.TempFile("", "_Go_ErrPathNUL")
136	if err != nil {
137		t.Fatalf("open ErrPathNUL tempfile: %s", err)
138	}
139	defer os.Remove(f.Name())
140	defer f.Close()
141	f2, err := os.OpenFile(f.Name(), os.O_RDWR, 0600)
142	if err != nil {
143		t.Fatalf("open ErrPathNUL: %s", err)
144	}
145	f2.Close()
146	f2, err = os.OpenFile(f.Name()+"\x00", os.O_RDWR, 0600)
147	if err == nil {
148		f2.Close()
149		t.Fatal("Open should have failed")
150	}
151}
152