github.com/bhojpur/cache@v0.0.4/pkg/ioutils/fswriters_test.go (about)

     1  package ioutils
     2  
     3  // Copyright (c) 2018 Bhojpur Consulting Private Limited, India. All rights reserved.
     4  
     5  // Permission is hereby granted, free of charge, to any person obtaining a copy
     6  // of this software and associated documentation files (the "Software"), to deal
     7  // in the Software without restriction, including without limitation the rights
     8  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     9  // copies of the Software, and to permit persons to whom the Software is
    10  // furnished to do so, subject to the following conditions:
    11  
    12  // The above copyright notice and this permission notice shall be included in
    13  // all copies or substantial portions of the Software.
    14  
    15  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    16  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    17  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    18  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    19  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    20  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    21  // THE SOFTWARE.
    22  
    23  import (
    24  	"bytes"
    25  	"os"
    26  	"path/filepath"
    27  	"runtime"
    28  	"testing"
    29  )
    30  
    31  var (
    32  	testMode os.FileMode = 0640
    33  )
    34  
    35  func init() {
    36  	// Windows does not support full Linux file mode
    37  	if runtime.GOOS == "windows" {
    38  		testMode = 0666
    39  	}
    40  }
    41  
    42  func TestAtomicWriteToFile(t *testing.T) {
    43  	tmpDir, err := os.MkdirTemp("", "atomic-writers-test")
    44  	if err != nil {
    45  		t.Fatalf("Error when creating temporary directory: %s", err)
    46  	}
    47  	defer os.RemoveAll(tmpDir)
    48  
    49  	expected := []byte("barbaz")
    50  	if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, testMode); err != nil {
    51  		t.Fatalf("Error writing to file: %v", err)
    52  	}
    53  
    54  	actual, err := os.ReadFile(filepath.Join(tmpDir, "foo"))
    55  	if err != nil {
    56  		t.Fatalf("Error reading from file: %v", err)
    57  	}
    58  
    59  	if !bytes.Equal(actual, expected) {
    60  		t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
    61  	}
    62  
    63  	st, err := os.Stat(filepath.Join(tmpDir, "foo"))
    64  	if err != nil {
    65  		t.Fatalf("Error statting file: %v", err)
    66  	}
    67  	if expected := testMode; st.Mode() != expected {
    68  		t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
    69  	}
    70  }
    71  
    72  func TestAtomicWriteSetCommit(t *testing.T) {
    73  	tmpDir, err := os.MkdirTemp("", "atomic-writerset-test")
    74  	if err != nil {
    75  		t.Fatalf("Error when creating temporary directory: %s", err)
    76  	}
    77  	defer os.RemoveAll(tmpDir)
    78  
    79  	if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0700); err != nil {
    80  		t.Fatalf("Error creating tmp directory: %s", err)
    81  	}
    82  
    83  	targetDir := filepath.Join(tmpDir, "target")
    84  	ws, err := NewAtomicWriteSet(filepath.Join(tmpDir, "tmp"))
    85  	if err != nil {
    86  		t.Fatalf("Error creating atomic write set: %s", err)
    87  	}
    88  
    89  	expected := []byte("barbaz")
    90  	if err := ws.WriteFile("foo", expected, testMode); err != nil {
    91  		t.Fatalf("Error writing to file: %v", err)
    92  	}
    93  
    94  	if _, err := os.ReadFile(filepath.Join(targetDir, "foo")); err == nil {
    95  		t.Fatalf("Expected error reading file where should not exist")
    96  	}
    97  
    98  	if err := ws.Commit(targetDir); err != nil {
    99  		t.Fatalf("Error committing file: %s", err)
   100  	}
   101  
   102  	actual, err := os.ReadFile(filepath.Join(targetDir, "foo"))
   103  	if err != nil {
   104  		t.Fatalf("Error reading from file: %v", err)
   105  	}
   106  
   107  	if !bytes.Equal(actual, expected) {
   108  		t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
   109  	}
   110  
   111  	st, err := os.Stat(filepath.Join(targetDir, "foo"))
   112  	if err != nil {
   113  		t.Fatalf("Error statting file: %v", err)
   114  	}
   115  	if expected := testMode; st.Mode() != expected {
   116  		t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
   117  	}
   118  
   119  }
   120  
   121  func TestAtomicWriteSetCancel(t *testing.T) {
   122  	tmpDir, err := os.MkdirTemp("", "atomic-writerset-test")
   123  	if err != nil {
   124  		t.Fatalf("Error when creating temporary directory: %s", err)
   125  	}
   126  	defer os.RemoveAll(tmpDir)
   127  
   128  	if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0700); err != nil {
   129  		t.Fatalf("Error creating tmp directory: %s", err)
   130  	}
   131  
   132  	ws, err := NewAtomicWriteSet(filepath.Join(tmpDir, "tmp"))
   133  	if err != nil {
   134  		t.Fatalf("Error creating atomic write set: %s", err)
   135  	}
   136  
   137  	expected := []byte("barbaz")
   138  	if err := ws.WriteFile("foo", expected, testMode); err != nil {
   139  		t.Fatalf("Error writing to file: %v", err)
   140  	}
   141  
   142  	if err := ws.Cancel(); err != nil {
   143  		t.Fatalf("Error committing file: %s", err)
   144  	}
   145  
   146  	if _, err := os.ReadFile(filepath.Join(tmpDir, "target", "foo")); err == nil {
   147  		t.Fatalf("Expected error reading file where should not exist")
   148  	} else if !os.IsNotExist(err) {
   149  		t.Fatalf("Unexpected error reading file: %s", err)
   150  	}
   151  }