- package autofile
-
- import (
- "io"
- "io/ioutil"
- "os"
- "testing"
-
- "github.com/stretchr/testify/assert"
- "github.com/stretchr/testify/require"
-
- tmos "github.com/tendermint/tendermint/libs/os"
- "github.com/tendermint/tendermint/libs/rand"
- )
-
- func createTestGroupWithHeadSizeLimit(t *testing.T, headSizeLimit int64) *Group {
- testID := rand.RandStr(12)
- testDir := "_test_" + testID
- err := tmos.EnsureDir(testDir, 0700)
- require.NoError(t, err, "Error creating dir")
-
- headPath := testDir + "/myfile"
- g, err := OpenGroup(headPath, GroupHeadSizeLimit(headSizeLimit))
- require.NoError(t, err, "Error opening Group")
- 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 := createTestGroupWithHeadSizeLimit(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(rand.RandStr(999))
- require.NoError(t, err, "Error appending to head")
- }
- g.FlushAndSync()
- 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(rand.RandStr(999))
- require.NoError(t, err, "Error appending to head")
- g.FlushAndSync()
-
- // Calling checkHeadSizeLimit this time rolls it.
- g.checkHeadSizeLimit()
- assertGroupInfo(t, g.ReadGroupInfo(), 0, 1, 1000000, 0)
-
- // Write 1000 more bytes.
- err = g.WriteLine(rand.RandStr(999))
- require.NoError(t, err, "Error appending to head")
- g.FlushAndSync()
-
- // 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(rand.RandStr(999))
- require.NoError(t, err, "Error appending to head")
- }
- g.FlushAndSync()
- 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(rand.RandStr(999) + "\n"))
- require.NoError(t, err, "Error appending to head")
- g.FlushAndSync()
- 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 TestRotateFile(t *testing.T) {
- g := createTestGroupWithHeadSizeLimit(t, 0)
- g.WriteLine("Line 1")
- g.WriteLine("Line 2")
- g.WriteLine("Line 3")
- g.FlushAndSync()
- g.RotateFile()
- g.WriteLine("Line 4")
- g.WriteLine("Line 5")
- g.WriteLine("Line 6")
- g.FlushAndSync()
-
- // 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 TestWrite(t *testing.T) {
- g := createTestGroupWithHeadSizeLimit(t, 0)
-
- written := []byte("Medusa")
- g.Write(written)
- g.FlushAndSync()
-
- 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 := createTestGroupWithHeadSizeLimit(t, 0)
-
- professor := []byte("Professor Monster")
- g.Write(professor)
- g.FlushAndSync()
- g.RotateFile()
- frankenstein := []byte("Frankenstein's Monster")
- g.Write(frankenstein)
- g.FlushAndSync()
-
- 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 := createTestGroupWithHeadSizeLimit(t, 0)
-
- professor := []byte("Professor Monster")
- g.Write(professor)
- g.FlushAndSync()
- g.RotateFile()
- frankenstein := []byte("Frankenstein's Monster")
- frankensteinPart := []byte("Frankenstein")
- g.Write(frankensteinPart) // note writing only a part
- g.FlushAndSync()
-
- 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 := createTestGroupWithHeadSizeLimit(t, 0)
-
- assert.Zero(t, g.MinIndex(), "MinIndex should be zero at the beginning")
-
- // Cleanup
- destroyTestGroup(t, g)
- }
-
- func TestMaxIndex(t *testing.T) {
- g := createTestGroupWithHeadSizeLimit(t, 0)
-
- assert.Zero(t, g.MaxIndex(), "MaxIndex should be zero at the beginning")
-
- g.WriteLine("Line 1")
- g.FlushAndSync()
- g.RotateFile()
-
- assert.Equal(t, 1, g.MaxIndex(), "MaxIndex should point to the last file")
-
- // Cleanup
- destroyTestGroup(t, g)
- }
|