github.com/m3db/m3@v1.5.0/src/m3em/os/fs/util_test.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package fs
    22  
    23  import (
    24  	"io/ioutil"
    25  	"os"
    26  	"testing"
    27  
    28  	"github.com/stretchr/testify/require"
    29  )
    30  
    31  var (
    32  	testingPrefixDir = "fs-testing-"
    33  )
    34  
    35  func newTempDir(t *testing.T) string {
    36  	dir, err := ioutil.TempDir("", testingPrefixDir)
    37  	require.NoError(t, err)
    38  	return dir
    39  }
    40  
    41  func newTempFile(t *testing.T, dir string, content []byte) *os.File {
    42  	tmpfile, err := ioutil.TempFile(dir, "example")
    43  	require.NoError(t, err)
    44  	n, err := tmpfile.Write(content)
    45  	require.NoError(t, err)
    46  	require.Equal(t, len(content), n)
    47  	require.NoError(t, tmpfile.Close())
    48  	return tmpfile
    49  }
    50  
    51  func TestRemoveContents(t *testing.T) {
    52  	var (
    53  		content        = []byte("temporary file content")
    54  		tmpdir         = newTempDir(t)
    55  		numFilesToTest = 3
    56  	)
    57  
    58  	// create a random files
    59  	for i := 0; i < numFilesToTest; i++ {
    60  		tmpfile := newTempFile(t, tmpdir, content)
    61  		tmpfile.Close()
    62  	}
    63  	files, err := ioutil.ReadDir(tmpdir)
    64  	require.NoError(t, err)
    65  	require.Equal(t, numFilesToTest, len(files))
    66  
    67  	// remove contents of dir, list to make sure nothing is in there
    68  	require.NoError(t, RemoveContents(tmpdir))
    69  	fi, err := os.Stat(tmpdir)
    70  	require.NoError(t, err)
    71  	require.True(t, fi.IsDir())
    72  	files, err = ioutil.ReadDir(tmpdir)
    73  	require.NoError(t, err)
    74  	require.Equal(t, 0, len(files))
    75  }