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Source file src/io/ioutil/tempfile_test.go

Documentation: io/ioutil

     1  // Copyright 2010 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  
     5  package ioutil
     6  
     7  import (
     8  	"os"
     9  	"path/filepath"
    10  	"regexp"
    11  	"strings"
    12  	"testing"
    13  )
    14  
    15  func TestTempFile(t *testing.T) {
    16  	dir, err := TempDir("", "TestTempFile_BadDir")
    17  	if err != nil {
    18  		t.Fatal(err)
    19  	}
    20  	defer os.RemoveAll(dir)
    21  
    22  	nonexistentDir := filepath.Join(dir, "_not_exists_")
    23  	f, err := TempFile(nonexistentDir, "foo")
    24  	if f != nil || err == nil {
    25  		t.Errorf("TempFile(%q, `foo`) = %v, %v", nonexistentDir, f, err)
    26  	}
    27  }
    28  
    29  func TestTempFile_pattern(t *testing.T) {
    30  	tests := []struct{ pattern, prefix, suffix string }{
    31  		{"ioutil_test", "ioutil_test", ""},
    32  		{"ioutil_test*", "ioutil_test", ""},
    33  		{"ioutil_test*xyz", "ioutil_test", "xyz"},
    34  	}
    35  	for _, test := range tests {
    36  		f, err := TempFile("", test.pattern)
    37  		if err != nil {
    38  			t.Errorf("TempFile(..., %q) error: %v", test.pattern, err)
    39  			continue
    40  		}
    41  		defer os.Remove(f.Name())
    42  		base := filepath.Base(f.Name())
    43  		f.Close()
    44  		if !(strings.HasPrefix(base, test.prefix) && strings.HasSuffix(base, test.suffix)) {
    45  			t.Errorf("TempFile pattern %q created bad name %q; want prefix %q & suffix %q",
    46  				test.pattern, base, test.prefix, test.suffix)
    47  		}
    48  	}
    49  }
    50  
    51  func TestTempDir(t *testing.T) {
    52  	name, err := TempDir("/_not_exists_", "foo")
    53  	if name != "" || err == nil {
    54  		t.Errorf("TempDir(`/_not_exists_`, `foo`) = %v, %v", name, err)
    55  	}
    56  
    57  	dir := os.TempDir()
    58  	name, err = TempDir(dir, "ioutil_test")
    59  	if name == "" || err != nil {
    60  		t.Errorf("TempDir(dir, `ioutil_test`) = %v, %v", name, err)
    61  	}
    62  	if name != "" {
    63  		os.Remove(name)
    64  		re := regexp.MustCompile("^" + regexp.QuoteMeta(filepath.Join(dir, "ioutil_test")) + "[0-9]+$")
    65  		if !re.MatchString(name) {
    66  			t.Errorf("TempDir(`"+dir+"`, `ioutil_test`) created bad name %s", name)
    67  		}
    68  	}
    69  }
    70  
    71  // test that we return a nice error message if the dir argument to TempDir doesn't
    72  // exist (or that it's empty and os.TempDir doesn't exist)
    73  func TestTempDir_BadDir(t *testing.T) {
    74  	dir, err := TempDir("", "TestTempDir_BadDir")
    75  	if err != nil {
    76  		t.Fatal(err)
    77  	}
    78  	defer os.RemoveAll(dir)
    79  
    80  	badDir := filepath.Join(dir, "not-exist")
    81  	_, err = TempDir(badDir, "foo")
    82  	if pe, ok := err.(*os.PathError); !ok || !os.IsNotExist(err) || pe.Path != badDir {
    83  		t.Errorf("TempDir error = %#v; want PathError for path %q satisifying os.IsNotExist", err, badDir)
    84  	}
    85  }
    86  

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