// 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) + "$" runTestTempDir(t, tt.pattern, wantRePat) }) } // Separately testing "*xyz" (which has no prefix). That is when constructing the // pattern to assert on, as in the previous loop, using filepath.Join for an empty // prefix filepath.Join(dir, ""), produces the pattern: // ^[0-9]+xyz$ // yet we just want to match // "^/[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 satisifying 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) } }) } }