github.com/avahowell/sia@v0.5.1-beta.0.20160524050156-83dcc3d37c94/persist/persist_test.go (about)

     1  package persist
     2  
     3  import (
     4  	"bytes"
     5  	"crypto/rand"
     6  	"io/ioutil"
     7  	"os"
     8  	"path/filepath"
     9  	"testing"
    10  
    11  	"github.com/NebulousLabs/Sia/build"
    12  )
    13  
    14  // TestIntegrationRandomSuffix checks that the random suffix creator creates
    15  // valid files.
    16  func TestIntegrationRandomSuffix(t *testing.T) {
    17  	tmpDir := build.TempDir(persistDir, "TestIntegrationRandomSuffix")
    18  	err := os.MkdirAll(tmpDir, 0700)
    19  	if err != nil {
    20  		t.Fatal(err)
    21  	}
    22  	for i := 0; i < 100; i++ {
    23  		suffix := RandomSuffix()
    24  		filename := filepath.Join(tmpDir, "test file - "+suffix+".nil")
    25  		file, err := os.Create(filename)
    26  		if err != nil {
    27  			t.Fatal(err)
    28  		}
    29  		file.Close()
    30  	}
    31  }
    32  
    33  // TestAbsolutePathSafeFile tests creating and committing safe files with
    34  // absolute paths.
    35  func TestAbsolutePathSafeFile(t *testing.T) {
    36  	tmpDir := build.TempDir(persistDir, "TestAbsolutePathSafeFile")
    37  	err := os.MkdirAll(tmpDir, 0700)
    38  	if err != nil {
    39  		t.Fatal(err)
    40  	}
    41  	absPath := filepath.Join(tmpDir, "test")
    42  
    43  	// Create safe file.
    44  	sf, err := NewSafeFile(absPath)
    45  	defer sf.Close()
    46  	if err != nil {
    47  		t.Fatal(err)
    48  	}
    49  
    50  	// Check that the name of the file is not equal to the final name of the
    51  	// file.
    52  	if sf.Name() == absPath {
    53  		t.Errorf("safeFile created with filename: %s has temporary filename that is equivalent to finalName: %s\n", absPath, sf.Name())
    54  	}
    55  
    56  	// Write random data to the file and commit.
    57  	data := make([]byte, 10)
    58  	rand.Read(data)
    59  	_, err = sf.Write(data)
    60  	if err != nil {
    61  		t.Fatal(err)
    62  	}
    63  	err = sf.Commit()
    64  	if err != nil {
    65  		t.Fatal(err)
    66  	}
    67  
    68  	// Check that the file exists and has same data that was written to it.
    69  	dataRead, err := ioutil.ReadFile(absPath)
    70  	if err != nil {
    71  		t.Fatal(err)
    72  	}
    73  	if !bytes.Equal(data, dataRead) {
    74  		t.Fatalf("Committed file has different data than was written to it: expected %v, got %v\n", data, dataRead)
    75  	}
    76  }
    77  
    78  // TestRelativePathSafeFile tests creating and committing safe files with
    79  // relative paths. Specifically, we test that calling os.Chdir between creating
    80  // and committing a safe file doesn't affect the safe file's final path. The
    81  // relative path tested is relative to the working directory.
    82  func TestRelativePathSafeFile(t *testing.T) {
    83  	tmpDir := build.TempDir(persistDir, "TestRelativePathSafeFile")
    84  	err := os.MkdirAll(tmpDir, 0700)
    85  	if err != nil {
    86  		t.Fatal(err)
    87  	}
    88  	absPath := filepath.Join(tmpDir, "test")
    89  	wd, err := os.Getwd()
    90  	if err != nil {
    91  		t.Fatal(err)
    92  	}
    93  	relPath, err := filepath.Rel(wd, absPath)
    94  
    95  	// Create safe file.
    96  	sf, err := NewSafeFile(relPath)
    97  	defer sf.Close()
    98  	if err != nil {
    99  		t.Fatal(err)
   100  	}
   101  
   102  	// Check that the path of the file is not equal to the final path of the
   103  	// file.
   104  	if sf.Name() == absPath {
   105  		t.Errorf("safeFile created with filename: %s has temporary filename that is equivalent to finalName: %s\n", absPath, sf.Name())
   106  	}
   107  
   108  	// Write random data to the file.
   109  	data := make([]byte, 10)
   110  	rand.Read(data)
   111  	_, err = sf.Write(data)
   112  	if err != nil {
   113  		t.Fatal(err)
   114  	}
   115  
   116  	// Change directories and commit.
   117  	tmpChdir := build.TempDir(persistDir, "TestRelativePathSafeFileTmpChdir")
   118  	err = os.MkdirAll(tmpChdir, 0700)
   119  	if err != nil {
   120  		t.Fatal(err)
   121  	}
   122  	os.Chdir(tmpChdir)
   123  	defer os.Chdir(wd)
   124  	err = sf.CommitSync()
   125  	if err != nil {
   126  		t.Fatal(err)
   127  	}
   128  
   129  	// Check that the file exists and has same data that was written to it.
   130  	dataRead, err := ioutil.ReadFile(absPath)
   131  	if err != nil {
   132  		t.Fatal(err)
   133  	}
   134  	if !bytes.Equal(data, dataRead) {
   135  		t.Fatalf("Committed file has different data than was written to it: expected %v, got %v\n", data, dataRead)
   136  	}
   137  }