新增判断是否是周末的方法 (#105)

* 新增判断是否是周末的方法

* 新增判断是否是周末的方法

---------

Co-authored-by: huangxingming <huangxingming@kezaihui.com>

datetime/datetime.go

@@ -247,3 +247,7 @@ func DayOfYear(t time.Time) int {
 
 	return int(nowDate.Sub(firstDay).Hours() / 24)
 }
+
+func IsWeekend(t1 time.Time) bool {
+	return time.Saturday == t1.Weekday() || time.Sunday == t1.Weekday()
+}

datetime/datetime_test.go

@@ -286,3 +286,19 @@ func TestDayOfYear(t *testing.T) {
 	result3 := DayOfYear(date3)
 	assert.Equal(0, result3)
 }
+
+func TestIsWeekend(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsWeekend")
+	date := time.Date(2023, 06, 03, 0, 0, 0, 0, time.Local)
+	result := IsWeekend(date)
+	assert.Equal(true, result)
+
+	date1 := time.Date(2023, 06, 04, 0, 0, 0, 0, time.Local)
+	result1 := IsWeekend(date1)
+	assert.Equal(true, result1)
+
+	date2 := time.Date(2023, 06, 02, 0, 0, 0, 0, time.Local)
+	result2 := IsWeekend(date2)
+	assert.Equal(false, result2)
+
+}