can pass duration to period

cmd/cli/flag_test.go

@@ -0,0 +1,41 @@
+package cli
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPeriodSetT(t *testing.T) {
+	now := time.Date(2010, 1, 1, 0, 0, 0, 0, time.UTC)
+	cases := map[string]time.Time{
+		"2001-02-03":  time.Date(2001, 2, 3, 0, 0, 0, 0, time.UTC),
+		"2001-02":     time.Date(2001, 2, 1, 0, 0, 0, 0, time.UTC),
+		"2001":        time.Date(2001, 1, 1, 0, 0, 0, 0, time.UTC),
+		"":            time.Unix(0, 0),
+		"1m":          now.Add(1 * time.Minute),
+		"+1m":         now.Add(1 * time.Minute),
+		"-1m":         now.Add(-1 * time.Minute),
+		"1h1m":        now.Add(1*time.Hour + 1*time.Minute),
+		"1d":          now.Add(24 * time.Hour),
+		"+1d":         now.Add(24 * time.Hour),
+		"-1d":         now.Add(-24 * time.Hour),
+		"1d1m":        now.Add(24*time.Hour + 1*time.Minute),
+		"+1d1m":       now.Add(24*time.Hour + 1*time.Minute),
+		"-1d1m":       now.Add(-1*24*time.Hour + -1*1*time.Minute),
+		"1y1mo1w1d1h": now.AddDate(1, 1, 7+1).Add(1 * time.Hour),
+	}
+
+	for input, expect := range cases {
+		input, expect := input, expect
+		t.Run(input, func(t *testing.T) {
+			p := &Period{}
+			var got time.Time
+			if _, err := p.setT(now, input, &got); err != nil {
+				t.Fatal(err)
+			}
+			if got.Unix() != expect.Unix() {
+				t.Errorf("expected %s but got %s", expect.String(), got.String())
+			}
+		})
+	}
+}