package logrus import ( "bytes" "encoding/json" "strconv" "strings" "testing" "github.com/stretchr/testify/assert" ) func LogAndAssertJSON(t *testing.T, log func(*Logger), assertions func(fields Fields)) { var buffer bytes.Buffer var fields Fields logger := New() logger.Out = &buffer logger.Formatter = new(JSONFormatter) log(logger) err := json.Unmarshal(buffer.Bytes(), &fields) assert.Nil(t, err) assertions(fields) } func LogAndAssertText(t *testing.T, log func(*Logger), assertions func(fields map[string]string)) { var buffer bytes.Buffer logger := New() logger.Out = &buffer logger.Formatter = &TextFormatter{ DisableColors: true, } log(logger) fields := make(map[string]string) for _, kv := range strings.Split(buffer.String(), " ") { if !strings.Contains(kv, "=") { continue } kvArr := strings.Split(kv, "=") key := strings.TrimSpace(kvArr[0]) val := kvArr[1] if kvArr[1][0] == '"' { var err error val, err = strconv.Unquote(val) assert.NoError(t, err) } fields[key] = val } assertions(fields) } func TestPrint(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Print("test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test") assert.Equal(t, fields["level"], "info") }) } func TestInfo(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Info("test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test") assert.Equal(t, fields["level"], "info") }) } func TestWarn(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Warn("test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test") assert.Equal(t, fields["level"], "warning") }) } func TestInfolnShouldAddSpacesBetweenStrings(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Infoln("test", "test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test test") }) } func TestInfolnShouldAddSpacesBetweenStringAndNonstring(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Infoln("test", 10) }, func(fields Fields) { assert.Equal(t, fields["msg"], "test 10") }) } func TestInfolnShouldAddSpacesBetweenTwoNonStrings(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Infoln(10, 10) }, func(fields Fields) { assert.Equal(t, fields["msg"], "10 10") }) } func TestInfoShouldAddSpacesBetweenTwoNonStrings(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Infoln(10, 10) }, func(fields Fields) { assert.Equal(t, fields["msg"], "10 10") }) } func TestInfoShouldNotAddSpacesBetweenStringAndNonstring(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Info("test", 10) }, func(fields Fields) { assert.Equal(t, fields["msg"], "test10") }) } func TestInfoShouldNotAddSpacesBetweenStrings(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.Info("test", "test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "testtest") }) } func TestWithFieldsShouldAllowAssignments(t *testing.T) { var buffer bytes.Buffer var fields Fields logger := New() logger.Out = &buffer logger.Formatter = new(JSONFormatter) localLog := logger.WithFields(Fields{ "key1": "value1", }) localLog.WithField("key2", "value2").Info("test") err := json.Unmarshal(buffer.Bytes(), &fields) assert.Nil(t, err) assert.Equal(t, "value2", fields["key2"]) assert.Equal(t, "value1", fields["key1"]) buffer = bytes.Buffer{} fields = Fields{} localLog.Info("test") err = json.Unmarshal(buffer.Bytes(), &fields) assert.Nil(t, err) _, ok := fields["key2"] assert.Equal(t, false, ok) assert.Equal(t, "value1", fields["key1"]) } func TestUserSuppliedFieldDoesNotOverwriteDefaults(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.WithField("msg", "hello").Info("test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test") }) } func TestUserSuppliedMsgFieldHasPrefix(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.WithField("msg", "hello").Info("test") }, func(fields Fields) { assert.Equal(t, fields["msg"], "test") assert.Equal(t, fields["fields.msg"], "hello") }) } func TestUserSuppliedTimeFieldHasPrefix(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.WithField("time", "hello").Info("test") }, func(fields Fields) { assert.Equal(t, fields["fields.time"], "hello") }) } func TestUserSuppliedLevelFieldHasPrefix(t *testing.T) { LogAndAssertJSON(t, func(log *Logger) { log.WithField("level", 1).Info("test") }, func(fields Fields) { assert.Equal(t, fields["level"], "info") assert.Equal(t, fields["fields.level"], 1) }) } func TestDefaultFieldsAreNotPrefixed(t *testing.T) { LogAndAssertText(t, func(log *Logger) { ll := log.WithField("herp", "derp") ll.Info("hello") ll.Info("bye") }, func(fields map[string]string) { for _, fieldName := range []string{"fields.level", "fields.time", "fields.msg"} { if _, ok := fields[fieldName]; ok { t.Fatalf("should not have prefixed %q: %v", fieldName, fields) } } }) } func TestDoubleLoggingDoesntPrefixPreviousFields(t *testing.T) { var buffer bytes.Buffer var fields Fields logger := New() logger.Out = &buffer logger.Formatter = new(JSONFormatter) llog := logger.WithField("context", "eating raw fish") llog.Info("looks delicious") err := json.Unmarshal(buffer.Bytes(), &fields) assert.NoError(t, err, "should have decoded first message") assert.Len(t, fields, 4, "should only have msg/time/level/context fields") assert.Equal(t, fields["msg"], "looks delicious") assert.Equal(t, fields["context"], "eating raw fish") buffer.Reset() llog.Warn("omg it is!") err = json.Unmarshal(buffer.Bytes(), &fields) assert.NoError(t, err, "should have decoded second message") assert.Len(t, fields, 4, "should only have msg/time/level/context fields") assert.Equal(t, fields["msg"], "omg it is!") assert.Equal(t, fields["context"], "eating raw fish") assert.Nil(t, fields["fields.msg"], "should not have prefixed previous `msg` entry") } func TestConvertLevelToString(t *testing.T) { assert.Equal(t, "debug", DebugLevel.String()) assert.Equal(t, "info", InfoLevel.String()) assert.Equal(t, "warning", WarnLevel.String()) assert.Equal(t, "error", ErrorLevel.String()) assert.Equal(t, "fatal", FatalLevel.String()) assert.Equal(t, "panic", PanicLevel.String()) } func TestParseLevel(t *testing.T) { l, err := ParseLevel("panic") assert.Nil(t, err) assert.Equal(t, PanicLevel, l) l, err = ParseLevel("fatal") assert.Nil(t, err) assert.Equal(t, FatalLevel, l) l, err = ParseLevel("error") assert.Nil(t, err) assert.Equal(t, ErrorLevel, l) l, err = ParseLevel("warn") assert.Nil(t, err) assert.Equal(t, WarnLevel, l) l, err = ParseLevel("warning") assert.Nil(t, err) assert.Equal(t, WarnLevel, l) l, err = ParseLevel("info") assert.Nil(t, err) assert.Equal(t, InfoLevel, l) l, err = ParseLevel("debug") assert.Nil(t, err) assert.Equal(t, DebugLevel, l) l, err = ParseLevel("invalid") assert.Equal(t, "not a valid logrus Level: \"invalid\"", err.Error()) }