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package events
import (
"io/ioutil"
"os"
"testing"
"github.com/stretchr/testify/require"
)
func TestRotateLog(t *testing.T) {
tests := []struct {
// If sizeInitial + sizeContent >= sizeLimit, then rotate
sizeInitial uint64
sizeContent uint64
sizeLimit uint64
mustRotate bool
}{
// No rotation
{0, 0, 1, false},
{1, 1, 0, false},
{10, 10, 30, false},
{1000, 500, 1600, false},
// Rotation
{10, 10, 20, true},
{30, 0, 29, true},
{200, 50, 150, true},
{1000, 600, 1500, true},
}
for _, test := range tests {
tmp, err := ioutil.TempFile("", "log-rotation-")
require.NoError(t, err)
defer os.Remove(tmp.Name())
defer tmp.Close()
// Create dummy file and content.
initialContent := make([]byte, test.sizeInitial)
logContent := make([]byte, test.sizeContent)
// Write content to the file.
_, err = tmp.Write(initialContent)
require.NoError(t, err)
// Now rotate
fInfoBeforeRotate, err := tmp.Stat()
require.NoError(t, err)
isRotated, err := rotateLog(tmp.Name(), string(logContent), test.sizeLimit)
require.NoError(t, err)
fInfoAfterRotate, err := os.Stat(tmp.Name())
// Test if rotation was successful
if test.mustRotate {
// File has been renamed
require.True(t, isRotated)
require.NoError(t, err, "log file has been renamed")
require.NotEqual(t, fInfoBeforeRotate.Size(), fInfoAfterRotate.Size())
} else {
// File has not been renamed
require.False(t, isRotated)
require.NoError(t, err, "log file has not been renamed")
require.Equal(t, fInfoBeforeRotate.Size(), fInfoAfterRotate.Size())
}
}
}
func TestTruncationOutput(t *testing.T) {
contentBefore := `0
1
2
3
4
5
6
7
8
9
10
`
contentAfter := `6
7
8
9
10
`
// Create dummy file
tmp, err := ioutil.TempFile("", "log-rotation")
require.NoError(t, err)
defer os.Remove(tmp.Name())
defer tmp.Close()
// Write content before truncation to dummy file
_, err = tmp.WriteString(contentBefore)
require.NoError(t, err)
// Truncate the file
beforeTruncation, err := ioutil.ReadFile(tmp.Name())
require.NoError(t, err)
err = truncate(tmp.Name())
require.NoError(t, err)
afterTruncation, err := ioutil.ReadFile(tmp.Name())
require.NoError(t, err)
// Test if rotation was successful
require.NoError(t, err, "Log content has changed")
require.NotEqual(t, beforeTruncation, afterTruncation)
require.Equal(t, string(afterTruncation), contentAfter)
}
func TestRenameLog(t *testing.T) {
fileContent := `0
1
2
3
4
5
`
// Create two dummy files
source, err := ioutil.TempFile("", "removing")
require.NoError(t, err)
target, err := ioutil.TempFile("", "renaming")
require.NoError(t, err)
// Write to source dummy file
_, err = source.WriteString(fileContent)
require.NoError(t, err)
// Rename the files
beforeRename, err := ioutil.ReadFile(source.Name())
require.NoError(t, err)
err = renameLog(source.Name(), target.Name())
require.NoError(t, err)
afterRename, err := ioutil.ReadFile(target.Name())
require.NoError(t, err)
// Test if renaming was successful
require.Error(t, os.Remove(source.Name()))
require.NoError(t, os.Remove(target.Name()))
require.Equal(t, beforeRename, afterRename)
}
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