github.com/cockroachdb/pebble@v0.0.0-20231214172447-ab4952c5f87b/internal/base/filenames_test.go (about)

     1  // Copyright 2012 The LevelDB-Go and Pebble Authors. All rights reserved. Use
     2  // of this source code is governed by a BSD-style license that can be found in
     3  // the LICENSE file.
     4  
     5  package base
     6  
     7  import (
     8  	"bytes"
     9  	"fmt"
    10  	"os"
    11  	"testing"
    12  
    13  	"github.com/cockroachdb/pebble/vfs"
    14  	"github.com/cockroachdb/redact"
    15  	"github.com/stretchr/testify/require"
    16  )
    17  
    18  func TestParseFilename(t *testing.T) {
    19  	testCases := map[string]bool{
    20  		"000000.log":             true,
    21  		"000000.log.zip":         false,
    22  		"000000..log":            false,
    23  		"a000000.log":            false,
    24  		"abcdef.log":             false,
    25  		"000001ldb":              false,
    26  		"000001.sst":             true,
    27  		"CURRENT":                true,
    28  		"CURRaNT":                false,
    29  		"LOCK":                   true,
    30  		"xLOCK":                  false,
    31  		"x.LOCK":                 false,
    32  		"MANIFEST":               false,
    33  		"MANIFEST123456":         false,
    34  		"MANIFEST-":              false,
    35  		"MANIFEST-123456":        true,
    36  		"MANIFEST-123456.doc":    false,
    37  		"OPTIONS":                false,
    38  		"OPTIONS123456":          false,
    39  		"OPTIONS-":               false,
    40  		"OPTIONS-123456":         true,
    41  		"OPTIONS-123456.doc":     false,
    42  		"CURRENT.123456":         false,
    43  		"CURRENT.dbtmp":          false,
    44  		"CURRENT.123456.dbtmp":   true,
    45  		"temporary.123456.dbtmp": true,
    46  	}
    47  	fs := vfs.NewMem()
    48  	for tc, want := range testCases {
    49  		_, _, got := ParseFilename(fs, fs.PathJoin("foo", tc))
    50  		if got != want {
    51  			t.Errorf("%q: got %v, want %v", tc, got, want)
    52  		}
    53  	}
    54  }
    55  
    56  func TestFilenameRoundTrip(t *testing.T) {
    57  	testCases := map[FileType]bool{
    58  		// CURRENT and LOCK files aren't numbered.
    59  		FileTypeCurrent: false,
    60  		FileTypeLock:    false,
    61  		// The remaining file types are numbered.
    62  		FileTypeLog:      true,
    63  		FileTypeManifest: true,
    64  		FileTypeTable:    true,
    65  		FileTypeOptions:  true,
    66  		FileTypeOldTemp:  true,
    67  		FileTypeTemp:     true,
    68  	}
    69  	fs := vfs.NewMem()
    70  	for fileType, numbered := range testCases {
    71  		fileNums := []FileNum{0}
    72  		if numbered {
    73  			fileNums = []FileNum{0, 1, 2, 3, 10, 42, 99, 1001}
    74  		}
    75  		for _, fileNum := range fileNums {
    76  			filename := MakeFilepath(fs, "foo", fileType, fileNum.DiskFileNum())
    77  			gotFT, gotFN, gotOK := ParseFilename(fs, filename)
    78  			if !gotOK {
    79  				t.Errorf("could not parse %q", filename)
    80  				continue
    81  			}
    82  			if gotFT != fileType || gotFN.FileNum() != fileNum {
    83  				t.Errorf("filename=%q: got %v, %v, want %v, %v", filename, gotFT, gotFN, fileType, fileNum)
    84  				continue
    85  			}
    86  		}
    87  	}
    88  }
    89  
    90  type bufferFataler struct {
    91  	buf bytes.Buffer
    92  }
    93  
    94  func (b *bufferFataler) Fatalf(msg string, args ...interface{}) {
    95  	fmt.Fprintf(&b.buf, msg, args...)
    96  }
    97  
    98  func TestMustExist(t *testing.T) {
    99  	err := os.ErrNotExist
   100  	fs := vfs.Default
   101  	var buf bufferFataler
   102  	filename := fs.PathJoin("..", "..", "testdata", "db-stage-4", "000000.sst")
   103  
   104  	MustExist(fs, filename, &buf, err)
   105  	require.Equal(t, `000000.sst:
   106  file does not exist
   107  directory contains 9 files, 2 unknown, 1 tables, 1 logs, 2 manifests`, buf.buf.String())
   108  }
   109  
   110  func TestRedactFileNum(t *testing.T) {
   111  	// Ensure that redaction never redacts file numbers.
   112  	require.Equal(t, redact.RedactableString("000005"), redact.Sprint(FileNum(5)))
   113  	require.Equal(t, redact.RedactableString("000005"), redact.Sprint(DiskFileNum(5)))
   114  }