80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
package log
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import (
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"io/ioutil"
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"os"
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"strings"
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"testing"
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"time"
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)
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func TestLogRotation(t *testing.T) {
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tempDir, err := ioutil.TempDir("", "traefik_")
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if err != nil {
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t.Fatalf("Error setting up temporary directory: %s", err)
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}
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fileName := tempDir + "traefik.log"
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if err := OpenFile(fileName); err != nil {
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t.Fatalf("Error opening temporary file %s: %s", fileName, err)
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}
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defer CloseFile()
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rotatedFileName := fileName + ".rotated"
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iterations := 20
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halfDone := make(chan bool)
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writeDone := make(chan bool)
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go func() {
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for i := 0; i < iterations; i++ {
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Println("Test log line")
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if i == iterations/2 {
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halfDone <- true
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}
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}
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writeDone <- true
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}()
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<-halfDone
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err = os.Rename(fileName, rotatedFileName)
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if err != nil {
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t.Fatalf("Error renaming file: %s", err)
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}
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err = RotateFile()
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if err != nil {
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t.Fatalf("Error rotating file: %s", err)
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}
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select {
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case <-writeDone:
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gotLineCount := lineCount(t, fileName) + lineCount(t, rotatedFileName)
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if iterations != gotLineCount {
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t.Errorf("Wanted %d written log lines, got %d", iterations, gotLineCount)
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}
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case <-time.After(500 * time.Millisecond):
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t.Fatalf("test timed out")
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}
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close(halfDone)
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close(writeDone)
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}
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func lineCount(t *testing.T, fileName string) int {
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t.Helper()
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fileContents, err := ioutil.ReadFile(fileName)
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if err != nil {
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t.Fatalf("Error reading from file %s: %s", fileName, err)
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}
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count := 0
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for _, line := range strings.Split(string(fileContents), "\n") {
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if strings.TrimSpace(line) == "" {
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continue
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}
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count++
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}
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return count
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}
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