19: couting sundays

19_counting_sundays/counting_sundays_test.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+	"testing"
+)
+
+func Test_calWeek(t *testing.T) {
+	type args struct {
+		year  int
+		month int
+		day   int
+	}
+	tt := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"1900-01-01",
+			args{
+				1900,
+				01,
+				01,
+			},
+			1,
+		},
+		{
+			"2020-10-19",
+			args{
+				2020,
+				10,
+				19,
+			},
+			1,
+		},
+		{
+			"2020-10-21",
+			args{
+				2020,
+				10,
+				21,
+			},
+			3,
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			got := calWeek(tc.args.year, tc.args.month, tc.args.day)
+			if got != tc.want {
+				t.Errorf("calWeek = %d, want %d", got, tc.want)
+			}
+		})
+	}
+}
+
+func Test_isLeapYear(t *testing.T) {
+	tt := []struct {
+		name  string
+		input int
+		want  bool
+	}{
+		{
+			"1900",
+			1900,
+			false,
+		},
+		{
+			"2000",
+			2000,
+			true,
+		},
+		{
+			"2020",
+			2020,
+			true,
+		},
+		{
+			"2021",
+			2021,
+			false,
+		},
+		{
+			"1800",
+			1800,
+			false,
+		},
+		{
+			"1600",
+			1600,
+			true,
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			got := isLeapYear(tc.input)
+			if got != tc.want {
+				t.Errorf("isLeapYear(%d) = %v, want %v", tc.input, got, tc.want)
+			}
+		})
+	}
+}