package autofile import ( "errors" "fmt" "io" "io/ioutil" "os" "strconv" "strings" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" cmn "github.com/tendermint/tmlibs/common" ) // NOTE: Returned group has ticker stopped func createTestGroup(t *testing.T, headSizeLimit int64) *Group { testID := cmn.RandStr(12) testDir := "_test_" + testID err := cmn.EnsureDir(testDir, 0700) require.NoError(t, err, "Error creating dir") headPath := testDir + "/myfile" g, err := OpenGroup(headPath) require.NoError(t, err, "Error opening Group") g.SetHeadSizeLimit(headSizeLimit) g.stopTicker() require.NotEqual(t, nil, g, "Failed to create Group") return g } func destroyTestGroup(t *testing.T, g *Group) { g.Close() err := os.RemoveAll(g.Dir) require.NoError(t, err, "Error removing test Group directory") } func assertGroupInfo(t *testing.T, gInfo GroupInfo, minIndex, maxIndex int, totalSize, headSize int64) { assert.Equal(t, minIndex, gInfo.MinIndex) assert.Equal(t, maxIndex, gInfo.MaxIndex) assert.Equal(t, totalSize, gInfo.TotalSize) assert.Equal(t, headSize, gInfo.HeadSize) } func TestCheckHeadSizeLimit(t *testing.T) { g := createTestGroup(t, 1000*1000) // At first, there are no files. assertGroupInfo(t, g.ReadGroupInfo(), 0, 0, 0, 0) // Write 1000 bytes 999 times. for i := 0; i < 999; i++ { err := g.WriteLine(cmn.RandStr(999)) require.NoError(t, err, "Error appending to head") } g.Flush() assertGroupInfo(t, g.ReadGroupInfo(), 0, 0, 999000, 999000) // Even calling checkHeadSizeLimit manually won't rotate it. g.checkHeadSizeLimit() assertGroupInfo(t, g.ReadGroupInfo(), 0, 0, 999000, 999000) // Write 1000 more bytes. err := g.WriteLine(cmn.RandStr(999)) require.NoError(t, err, "Error appending to head") g.Flush() // Calling checkHeadSizeLimit this time rolls it. g.checkHeadSizeLimit() assertGroupInfo(t, g.ReadGroupInfo(), 0, 1, 1000000, 0) // Write 1000 more bytes. err = g.WriteLine(cmn.RandStr(999)) require.NoError(t, err, "Error appending to head") g.Flush() // Calling checkHeadSizeLimit does nothing. g.checkHeadSizeLimit() assertGroupInfo(t, g.ReadGroupInfo(), 0, 1, 1001000, 1000) // Write 1000 bytes 999 times. for i := 0; i < 999; i++ { err = g.WriteLine(cmn.RandStr(999)) require.NoError(t, err, "Error appending to head") } g.Flush() assertGroupInfo(t, g.ReadGroupInfo(), 0, 1, 2000000, 1000000) // Calling checkHeadSizeLimit rolls it again. g.checkHeadSizeLimit() assertGroupInfo(t, g.ReadGroupInfo(), 0, 2, 2000000, 0) // Write 1000 more bytes. _, err = g.Head.Write([]byte(cmn.RandStr(999) + "\n")) require.NoError(t, err, "Error appending to head") g.Flush() assertGroupInfo(t, g.ReadGroupInfo(), 0, 2, 2001000, 1000) // Calling checkHeadSizeLimit does nothing. g.checkHeadSizeLimit() assertGroupInfo(t, g.ReadGroupInfo(), 0, 2, 2001000, 1000) // Cleanup destroyTestGroup(t, g) } func TestSearch(t *testing.T) { g := createTestGroup(t, 10*1000) // Create some files in the group that have several INFO lines in them. // Try to put the INFO lines in various spots. for i := 0; i < 100; i++ { // The random junk at the end ensures that this INFO linen // is equally likely to show up at the end. _, err := g.Head.Write([]byte(fmt.Sprintf("INFO %v %v\n", i, cmn.RandStr(123)))) require.NoError(t, err, "Failed to write to head") g.checkHeadSizeLimit() for j := 0; j < 10; j++ { _, err1 := g.Head.Write([]byte(cmn.RandStr(123) + "\n")) require.NoError(t, err1, "Failed to write to head") g.checkHeadSizeLimit() } } // Create a search func that searches for line makeSearchFunc := func(target int) SearchFunc { return func(line string) (int, error) { parts := strings.Split(line, " ") if len(parts) != 3 { return -1, errors.New("Line did not have 3 parts") } i, err := strconv.Atoi(parts[1]) if err != nil { return -1, errors.New("Failed to parse INFO: " + err.Error()) } if target < i { return 1, nil } else if target == i { return 0, nil } else { return -1, nil } } } // Now search for each number for i := 0; i < 100; i++ { t.Log("Testing for i", i) gr, match, err := g.Search("INFO", makeSearchFunc(i)) require.NoError(t, err, "Failed to search for line") assert.True(t, match, "Expected Search to return exact match") line, err := gr.ReadLine() require.NoError(t, err, "Failed to read line after search") if !strings.HasPrefix(line, fmt.Sprintf("INFO %v ", i)) { t.Fatal("Failed to get correct line") } // Make sure we can continue to read from there. cur := i + 1 for { line, err := gr.ReadLine() if err == io.EOF { if cur == 99+1 { // OK! break } else { t.Fatal("Got EOF after the wrong INFO #") } } else if err != nil { t.Fatal("Error reading line", err) } if !strings.HasPrefix(line, "INFO ") { continue } if !strings.HasPrefix(line, fmt.Sprintf("INFO %v ", cur)) { t.Fatalf("Unexpected INFO #. Expected %v got:\n%v", cur, line) } cur++ } gr.Close() } // Now search for something that is too small. // We should get the first available line. { gr, match, err := g.Search("INFO", makeSearchFunc(-999)) require.NoError(t, err, "Failed to search for line") assert.False(t, match, "Expected Search to not return exact match") line, err := gr.ReadLine() require.NoError(t, err, "Failed to read line after search") if !strings.HasPrefix(line, "INFO 0 ") { t.Error("Failed to fetch correct line, which is the earliest INFO") } err = gr.Close() require.NoError(t, err, "Failed to close GroupReader") } // Now search for something that is too large. // We should get an EOF error. { gr, _, err := g.Search("INFO", makeSearchFunc(999)) assert.Equal(t, io.EOF, err) assert.Nil(t, gr) } // Cleanup destroyTestGroup(t, g) } func TestRotateFile(t *testing.T) { g := createTestGroup(t, 0) g.WriteLine("Line 1") g.WriteLine("Line 2") g.WriteLine("Line 3") g.Flush() g.RotateFile() g.WriteLine("Line 4") g.WriteLine("Line 5") g.WriteLine("Line 6") g.Flush() // Read g.Head.Path+"000" body1, err := ioutil.ReadFile(g.Head.Path + ".000") assert.NoError(t, err, "Failed to read first rolled file") if string(body1) != "Line 1\nLine 2\nLine 3\n" { t.Errorf("Got unexpected contents: [%v]", string(body1)) } // Read g.Head.Path body2, err := ioutil.ReadFile(g.Head.Path) assert.NoError(t, err, "Failed to read first rolled file") if string(body2) != "Line 4\nLine 5\nLine 6\n" { t.Errorf("Got unexpected contents: [%v]", string(body2)) } // Cleanup destroyTestGroup(t, g) } func TestFindLast1(t *testing.T) { g := createTestGroup(t, 0) g.WriteLine("Line 1") g.WriteLine("Line 2") g.WriteLine("# a") g.WriteLine("Line 3") g.Flush() g.RotateFile() g.WriteLine("Line 4") g.WriteLine("Line 5") g.WriteLine("Line 6") g.WriteLine("# b") g.Flush() match, found, err := g.FindLast("#") assert.NoError(t, err) assert.True(t, found) assert.Equal(t, "# b", match) // Cleanup destroyTestGroup(t, g) } func TestFindLast2(t *testing.T) { g := createTestGroup(t, 0) g.WriteLine("Line 1") g.WriteLine("Line 2") g.WriteLine("Line 3") g.Flush() g.RotateFile() g.WriteLine("# a") g.WriteLine("Line 4") g.WriteLine("Line 5") g.WriteLine("# b") g.WriteLine("Line 6") g.Flush() match, found, err := g.FindLast("#") assert.NoError(t, err) assert.True(t, found) assert.Equal(t, "# b", match) // Cleanup destroyTestGroup(t, g) } func TestFindLast3(t *testing.T) { g := createTestGroup(t, 0) g.WriteLine("Line 1") g.WriteLine("# a") g.WriteLine("Line 2") g.WriteLine("# b") g.WriteLine("Line 3") g.Flush() g.RotateFile() g.WriteLine("Line 4") g.WriteLine("Line 5") g.WriteLine("Line 6") g.Flush() match, found, err := g.FindLast("#") assert.NoError(t, err) assert.True(t, found) assert.Equal(t, "# b", match) // Cleanup destroyTestGroup(t, g) } func TestFindLast4(t *testing.T) { g := createTestGroup(t, 0) g.WriteLine("Line 1") g.WriteLine("Line 2") g.WriteLine("Line 3") g.Flush() g.RotateFile() g.WriteLine("Line 4") g.WriteLine("Line 5") g.WriteLine("Line 6") g.Flush() match, found, err := g.FindLast("#") assert.NoError(t, err) assert.False(t, found) assert.Empty(t, match) // Cleanup destroyTestGroup(t, g) } func TestWrite(t *testing.T) { g := createTestGroup(t, 0) written := []byte("Medusa") g.Write(written) g.Flush() read := make([]byte, len(written)) gr, err := g.NewReader(0) require.NoError(t, err, "failed to create reader") _, err = gr.Read(read) assert.NoError(t, err, "failed to read data") assert.Equal(t, written, read) // Cleanup destroyTestGroup(t, g) } // test that Read reads the required amount of bytes from all the files in the // group and returns no error if n == size of the given slice. func TestGroupReaderRead(t *testing.T) { g := createTestGroup(t, 0) professor := []byte("Professor Monster") g.Write(professor) g.Flush() g.RotateFile() frankenstein := []byte("Frankenstein's Monster") g.Write(frankenstein) g.Flush() totalWrittenLength := len(professor) + len(frankenstein) read := make([]byte, totalWrittenLength) gr, err := g.NewReader(0) require.NoError(t, err, "failed to create reader") n, err := gr.Read(read) assert.NoError(t, err, "failed to read data") assert.Equal(t, totalWrittenLength, n, "not enough bytes read") professorPlusFrankenstein := professor professorPlusFrankenstein = append(professorPlusFrankenstein, frankenstein...) assert.Equal(t, professorPlusFrankenstein, read) // Cleanup destroyTestGroup(t, g) } // test that Read returns an error if number of bytes read < size of // the given slice. Subsequent call should return 0, io.EOF. func TestGroupReaderRead2(t *testing.T) { g := createTestGroup(t, 0) professor := []byte("Professor Monster") g.Write(professor) g.Flush() g.RotateFile() frankenstein := []byte("Frankenstein's Monster") frankensteinPart := []byte("Frankenstein") g.Write(frankensteinPart) // note writing only a part g.Flush() totalLength := len(professor) + len(frankenstein) read := make([]byte, totalLength) gr, err := g.NewReader(0) require.NoError(t, err, "failed to create reader") // 1) n < (size of the given slice), io.EOF n, err := gr.Read(read) assert.Equal(t, io.EOF, err) assert.Equal(t, len(professor)+len(frankensteinPart), n, "Read more/less bytes than it is in the group") // 2) 0, io.EOF n, err = gr.Read([]byte("0")) assert.Equal(t, io.EOF, err) assert.Equal(t, 0, n) // Cleanup destroyTestGroup(t, g) } func TestMinIndex(t *testing.T) { g := createTestGroup(t, 0) assert.Zero(t, g.MinIndex(), "MinIndex should be zero at the beginning") // Cleanup destroyTestGroup(t, g) } func TestMaxIndex(t *testing.T) { g := createTestGroup(t, 0) assert.Zero(t, g.MaxIndex(), "MaxIndex should be zero at the beginning") g.WriteLine("Line 1") g.Flush() g.RotateFile() assert.Equal(t, 1, g.MaxIndex(), "MaxIndex should point to the last file") // Cleanup destroyTestGroup(t, g) }