test: Add test cases without timezone

Author: kuafuRace

traveler_unit_test.go

@@ -20,13 +20,16 @@ func (s *TravelerSuite) TearDownTest() {
 }
 
 func (s *TravelerSuite) TestNow() {
+	s.Run("without timezone", func() {
+		s.Equal(time.Now().Format(DateLayout), Now().Layout(DateLayout, Local))
+	})
+
 	s.Run("error timezone", func() {
 		s.Error(Now("xxx").Error)
 		s.Empty(Now("xxx").ToString())
 	})
 
 	s.Run("valid timezone", func() {
-		s.Equal(time.Now().Format(DateLayout), Now().Layout(DateLayout, Local))
 		s.Equal(time.Now().In(time.UTC).Format(DateLayout), Now(UTC).Layout(DateLayout))
 	})
 
@@ -38,13 +41,16 @@ func (s *TravelerSuite) TestNow() {
 }
 
 func (s *TravelerSuite) TestTomorrow() {
+	s.Run("without timezone", func() {
+		s.Equal(time.Now().Add(time.Hour*24).Format(DateLayout), Tomorrow().Layout(DateLayout, Local))
+	})
+
 	s.Run("error timezone", func() {
 		s.Error(Tomorrow("xxx").Error)
 		s.Empty(Tomorrow("xxx").ToString())
 	})
 
 	s.Run("valid timezone", func() {
-		s.Equal(time.Now().Add(time.Hour*24).Format(DateLayout), Tomorrow().Layout(DateLayout, Local))
 		s.Equal(time.Now().Add(time.Hour*24).In(time.UTC).Format(DateLayout), Tomorrow(UTC).Layout(DateLayout))
 	})
 
@@ -56,13 +62,16 @@ func (s *TravelerSuite) TestTomorrow() {
 }
 
 func (s *TravelerSuite) TestYesterday() {
+	s.Run("without timezone", func() {
+		s.Equal(time.Now().Add(time.Hour*-24).Format(DateLayout), Yesterday().Layout(DateLayout, Local))
+	})
+
 	s.Run("error timezone", func() {
 		s.Error(Yesterday("xxx").Error)
 		s.Empty(Yesterday("xxx").ToString())
 	})
 
 	s.Run("valid timezone", func() {
-		s.Equal(time.Now().Add(time.Hour*-24).Format(DateLayout), Yesterday().Layout(DateLayout, Local))
 		s.Equal(time.Now().Add(time.Hour*-24).In(time.UTC).Format(DateLayout), Yesterday(UTC).Layout(DateLayout))
 	})