Function check

libcontainer/logs/logs_linux_test.go:129–141

check checks that the file contains txt and does not contain notxt.

(t *testing.T, l *log, txt, notxt string)

// check checks that the file contains txt and does not contain notxt.
func check(t *testing.T, l *log, txt, notxt string) {
	t.Helper()
	contents, err := os.ReadFile(l.file.Name())
	if err != nil {
		t.Fatal(err)
	}
	if txt != "" && !bytes.Contains(contents, []byte(txt)) {
		t.Fatalf("%s does not contain %s", contents, txt)
	}
	if notxt != "" && bytes.Contains(contents, []byte(notxt)) {
		t.Fatalf("%s does contain %s", contents, notxt)
	}
}

// checkWait is like check, but if the file is empty,
// it waits until it's not.