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