some tests passed in clock

rust/gigasecond/tests/gigasecond.rs

@@ -0,0 +1,59 @@
+#[test]
+fn date_only_specification_of_time() {
+    let start = datetime(2011, 4, 25, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2043, 1, 1, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn second_test_for_date_only_specification_of_time() {
+    let start = datetime(1977, 6, 13, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2009, 2, 19, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn third_test_for_date_only_specification_of_time() {
+    let start = datetime(1959, 7, 19, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(1991, 3, 27, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn full_time_specified() {
+    let start = datetime(2015, 1, 24, 22, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2046, 10, 2, 23, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn full_time_with_day_roll_over() {
+    let start = datetime(2015, 1, 24, 23, 59, 59);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2046, 10, 3, 1, 46, 39);
+    assert_eq!(actual, expected);
+}
+
+fn datetime(
+    year: i32,
+    month: u8,
+    day: u8,
+    hour: u8,
+    minute: u8,
+    second: u8,
+) -> time::PrimitiveDateTime {
+    use time::{Date, PrimitiveDateTime, Time};
+
+    PrimitiveDateTime::new(
+        Date::from_calendar_date(year, month.try_into().unwrap(), day).unwrap(),
+        Time::from_hms(hour, minute, second).unwrap(),
+    )
+}