dir_test.go

Documentation: k8s.io/utils/temp

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package temp
    18  
    19  import (
    20  	"io/ioutil"
    21  	"os"
    22  	"path/filepath"
    23  	"strings"
    24  	"testing"
    25  )
    26  
    27  func TestTempDir(t *testing.T) {
    28  	dir, err := CreateTempDir("prefix")
    29  	if err != nil {
    30  		t.Fatal(err)
    31  	}
    32  
    33  	// Delete the directory no matter what.
    34  	defer dir.Delete()
    35  
    36  	// Make sure we have created the dir, with the proper name
    37  	_, err = os.Stat(dir.Name)
    38  	if err != nil {
    39  		t.Fatal(err)
    40  	}
    41  	if !strings.HasPrefix(filepath.Base(dir.Name), "prefix") {
    42  		t.Fatalf(`Directory doesn't start with "prefix": %q`,
    43  			dir.Name)
    44  	}
    45  
    46  	// Verify that the directory is empty
    47  	entries, err := ioutil.ReadDir(dir.Name)
    48  	if err != nil {
    49  		t.Fatal(err)
    50  	}
    51  	if len(entries) != 0 {
    52  		t.Fatalf("Directory should be empty, has %d elements",
    53  			len(entries))
    54  	}
    55  
    56  	// Create a couple of files
    57  	_, err = dir.NewFile("ONE")
    58  	if err != nil {
    59  		t.Fatal(err)
    60  	}
    61  	_, err = dir.NewFile("TWO")
    62  	if err != nil {
    63  		t.Fatal(err)
    64  	}
    65  	// We can't create the same file twice
    66  	_, err = dir.NewFile("TWO")
    67  	if err == nil {
    68  		t.Fatal("NewFile should fail to create the same file twice")
    69  	}
    70  
    71  	// We have created only two files
    72  	entries, err = ioutil.ReadDir(dir.Name)
    73  	if err != nil {
    74  		t.Fatal(err)
    75  	}
    76  	if len(entries) != 2 {
    77  		t.Fatalf("ReadDir should have two elements, has %d elements",
    78  			len(entries))
    79  	}
    80  
    81  	// Verify that deletion works
    82  	err = dir.Delete()
    83  	if err != nil {
    84  		t.Fatal(err)
    85  	}
    86  	_, err = os.Stat(dir.Name)
    87  	if err == nil {
    88  		t.Fatal("Directory should be gone, still present.")
    89  	}
    90  }
    91
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