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package log
import (
"io"
"io/ioutil"
"os"
"regexp"
"testing"
)
func mustNewFile(t *testing.T) (string, *Logger) {
f, err := ioutil.TempFile("", "log_test-")
if err != nil {
t.Fatalf("failed to create temp file: %v", err)
}
l, err := NewFile(f.Name())
if err != nil {
t.Fatalf("failed to open new log file: %v", err)
}
return f.Name(), l
}
func checkContentsMatch(t *testing.T, name, path, expected string) {
content, err := ioutil.ReadFile(path)
if err != nil {
panic(err)
}
got := string(content)
if !regexp.MustCompile(expected).Match(content) {
t.Errorf("%s: regexp %q did not match %q",
name, expected, got)
}
}
func testLogger(t *testing.T, fname string, l *Logger) {
l.logTime = false
l.Infof("message %d", 1)
checkContentsMatch(t, "info-no-time", fname,
"^_ log_test.go:.... message 1\n")
os.Truncate(fname, 0)
l.Infof("message %d\n", 1)
checkContentsMatch(t, "info-with-newline", fname,
"^_ log_test.go:.... message 1\n")
os.Truncate(fname, 0)
l.logTime = true
l.Infof("message %d", 1)
checkContentsMatch(t, "info-with-time", fname,
`^\d{8} ..:..:..\.\d{6} _ log_test.go:.... message 1\n`)
os.Truncate(fname, 0)
l.logTime = false
l.Errorf("error %d", 1)
checkContentsMatch(t, "error", fname, `^E log_test.go:.... error 1\n`)
if l.V(Debug) {
t.Fatalf("Debug level enabled by default (level: %v)", l.Level)
}
os.Truncate(fname, 0)
l.logTime = false
l.Debugf("debug %d", 1)
checkContentsMatch(t, "debug-no-log", fname, `^$`)
os.Truncate(fname, 0)
l.Level = Debug
l.Debugf("debug %d", 1)
checkContentsMatch(t, "debug", fname, `^\. log_test.go:.... debug 1\n`)
if !l.V(Debug) {
t.Errorf("l.Level = Debug, but V(Debug) = false")
}
os.Truncate(fname, 0)
l.Level = Info
l.Log(Debug, 0, "log debug %d", 1)
l.Log(Info, 0, "log info %d", 1)
checkContentsMatch(t, "log", fname,
`^_ log_test.go:.... log info 1\n`)
os.Truncate(fname, 0)
l.Level = Info
l.Log(Fatal, 0, "log fatal %d", 1)
checkContentsMatch(t, "log", fname,
`^☠ log_test.go:.... log fatal 1\n`)
}
func TestBasic(t *testing.T) {
fname, l := mustNewFile(t)
defer l.Close()
defer os.Remove(fname)
testLogger(t, fname, l)
}
func TestDefaultFile(t *testing.T) {
fname, l := mustNewFile(t)
l.Close()
defer os.Remove(fname)
*logFile = fname
Init()
testLogger(t, fname, Default)
}
func TestReopen(t *testing.T) {
fname, l := mustNewFile(t)
defer l.Close()
defer os.Remove(fname)
l.logTime = false
l.Infof("pre rename")
checkContentsMatch(t, "r", fname, `^_ log_test.go:.... pre rename\n`)
os.Rename(fname, fname+"-m")
defer os.Remove(fname + "-m")
l.Infof("post rename")
checkContentsMatch(t, "r", fname+"-m", `pre rename\n.* post rename`)
if err := l.Reopen(); err != nil {
t.Errorf("reopen: %v", err)
}
l.Infof("post reopen")
checkContentsMatch(t, "r", fname, `^_ log_test.go:.... post reopen\n`)
}
type nopCloser struct {
io.Writer
}
func (nopCloser) Close() error { return nil }
func TestReopenNull(t *testing.T) {
l := New(nopCloser{ioutil.Discard})
if err := l.Reopen(); err != nil {
t.Errorf("reopen: %v", err)
}
}
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