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// Copyright 2010 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 ioutil_test
import (
"io/fs"
. "io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"testing"
)
func TestTempFile(t *testing.T) {
dir, err := TempDir("", "TestTempFile_BadDir")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
nonexistentDir := filepath.Join(dir, "_not_exists_")
f, err := TempFile(nonexistentDir, "foo")
if f != nil || err == nil {
t.Errorf("TempFile(%q, `foo`) = %v, %v", nonexistentDir, f, err)
}
}
func TestTempFile_pattern(t *testing.T) {
tests := []struct{ pattern, prefix, suffix string }{
{"ioutil_test", "ioutil_test", ""},
{"ioutil_test*", "ioutil_test", ""},
{"ioutil_test*xyz", "ioutil_test", "xyz"},
}
for _, test := range tests {
f, err := TempFile("", test.pattern)
if err != nil {
t.Errorf("TempFile(..., %q) error: %v", test.pattern, err)
continue
}
defer os.Remove(f.Name())
base := filepath.Base(f.Name())
f.Close()
if !(strings.HasPrefix(base, test.prefix) && strings.HasSuffix(base, test.suffix)) {
t.Errorf("TempFile pattern %q created bad name %q; want prefix %q & suffix %q",
test.pattern, base, test.prefix, test.suffix)
}
}
}
// This string is from os.errPatternHasSeparator.
const patternHasSeparator = "pattern contains path separator"
func TestTempFile_BadPattern(t *testing.T) {
tmpDir, err := TempDir("", t.Name())
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpDir)
const sep = string(os.PathSeparator)
tests := []struct {
pattern string
wantErr bool
}{
{"ioutil*test", false},
{"ioutil_test*foo", false},
{"ioutil_test" + sep + "foo", true},
{"ioutil_test*" + sep + "foo", true},
{"ioutil_test" + sep + "*foo", true},
{sep + "ioutil_test" + sep + "*foo", true},
{"ioutil_test*foo" + sep, true},
}
for _, tt := range tests {
t.Run(tt.pattern, func(t *testing.T) {
tmpfile, err := TempFile(tmpDir, tt.pattern)
defer func() {
if tmpfile != nil {
tmpfile.Close()
}
}()
if tt.wantErr {
if err == nil {
t.Errorf("Expected an error for pattern %q", tt.pattern)
} else if !strings.Contains(err.Error(), patternHasSeparator) {
t.Errorf("Error mismatch: got %#v, want %q for pattern %q", err, patternHasSeparator, tt.pattern)
}
} else if err != nil {
t.Errorf("Unexpected error %v for pattern %q", err, tt.pattern)
}
})
}
}
func TestTempDir(t *testing.T) {
name, err := TempDir("/_not_exists_", "foo")
if name != "" || err == nil {
t.Errorf("TempDir(`/_not_exists_`, `foo`) = %v, %v", name, err)
}
tests := []struct {
pattern string
wantPrefix, wantSuffix string
}{
{"ioutil_test", "ioutil_test", ""},
{"ioutil_test*", "ioutil_test", ""},
{"ioutil_test*xyz", "ioutil_test", "xyz"},
}
dir := os.TempDir()
runTestTempDir := func(t *testing.T, pattern, wantRePat string) {
name, err := TempDir(dir, pattern)
if name == "" || err != nil {
t.Fatalf("TempDir(dir, `ioutil_test`) = %v, %v", name, err)
}
defer os.Remove(name)
re := regexp.MustCompile(wantRePat)
if !re.MatchString(name) {
t.Errorf("TempDir(%q, %q) created bad name\n\t%q\ndid not match pattern\n\t%q", dir, pattern, name, wantRePat)
}
}
for _, tt := range tests {
t.Run(tt.pattern, func(t *testing.T) {
wantRePat := "^" + regexp.QuoteMeta(filepath.Join(dir, tt.wantPrefix)) + "[0-9]+" + regexp.QuoteMeta(tt.wantSuffix) + "$"
runTestTempDir(t, tt.pattern, wantRePat)
})
}
// Separately testing "*xyz" (which has no prefix). That is when constructing the
// pattern to assert on, as in the previous loop, using filepath.Join for an empty
// prefix filepath.Join(dir, ""), produces the pattern:
// ^<DIR>[0-9]+xyz$
// yet we just want to match
// "^<DIR>/[0-9]+xyz"
t.Run("*xyz", func(t *testing.T) {
wantRePat := "^" + regexp.QuoteMeta(filepath.Join(dir)) + regexp.QuoteMeta(string(filepath.Separator)) + "[0-9]+xyz$"
runTestTempDir(t, "*xyz", wantRePat)
})
}
// test that we return a nice error message if the dir argument to TempDir doesn't
// exist (or that it's empty and os.TempDir doesn't exist)
func TestTempDir_BadDir(t *testing.T) {
dir, err := TempDir("", "TestTempDir_BadDir")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
badDir := filepath.Join(dir, "not-exist")
_, err = TempDir(badDir, "foo")
if pe, ok := err.(*fs.PathError); !ok || !os.IsNotExist(err) || pe.Path != badDir {
t.Errorf("TempDir error = %#v; want PathError for path %q satisfying os.IsNotExist", err, badDir)
}
}
func TestTempDir_BadPattern(t *testing.T) {
tmpDir, err := TempDir("", t.Name())
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpDir)
const sep = string(os.PathSeparator)
tests := []struct {
pattern string
wantErr bool
}{
{"ioutil*test", false},
{"ioutil_test*foo", false},
{"ioutil_test" + sep + "foo", true},
{"ioutil_test*" + sep + "foo", true},
{"ioutil_test" + sep + "*foo", true},
{sep + "ioutil_test" + sep + "*foo", true},
{"ioutil_test*foo" + sep, true},
}
for _, tt := range tests {
t.Run(tt.pattern, func(t *testing.T) {
_, err := TempDir(tmpDir, tt.pattern)
if tt.wantErr {
if err == nil {
t.Errorf("Expected an error for pattern %q", tt.pattern)
} else if !strings.Contains(err.Error(), patternHasSeparator) {
t.Errorf("Error mismatch: got %#v, want %q for pattern %q", err, patternHasSeparator, tt.pattern)
}
} else if err != nil {
t.Errorf("Unexpected error %v for pattern %q", err, tt.pattern)
}
})
}
}