Implement TimeRanges interface

tests/unit/script/lib.rs

@@ -13,6 +13,8 @@
 #[cfg(test)] mod headers;
 #[cfg(test)] mod htmlareaelement;
 #[cfg(test)] mod htmlimageelement;
+#[cfg(test)] mod timeranges;
+
 
 /**
 ```compile_fail,E0277

tests/unit/script/timeranges.rs

@@ -0,0 +1,87 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use script::test::timeranges::TimeRangesContainer;
+
+fn check(time_ranges: &TimeRangesContainer, expected: &'static str) {
+    assert_eq!(
+        format!("{:?}", time_ranges),
+        format!("TimeRangesContainer {{ ranges: [{}] }}", expected)
+    );
+}
+
+#[test]
+fn initial_state() {
+    let time_ranges = TimeRangesContainer::new();
+    assert_eq!(time_ranges.len(), 0);
+    assert!(time_ranges.start(0).is_err());
+    assert!(time_ranges.end(0).is_err());
+}
+
+#[test]
+fn error_if_start_is_older_than_end() {
+    let mut time_ranges = TimeRangesContainer::new();
+    assert!(time_ranges.add(2., 1.).is_err());
+}
+
+#[test]
+fn single_range() {
+    let mut time_ranges = TimeRangesContainer::new();
+    time_ranges.add(1., 2.).unwrap();
+    check(&time_ranges, "[1,2)");
+    assert_eq!(time_ranges.start(0).unwrap(), 1.);
+    assert_eq!(time_ranges.end(0).unwrap(), 2.);
+}
+
+#[test]
+fn add_order() {
+    let mut time_ranges_a = TimeRangesContainer::new();
+    for range in vec![(0., 2.), (3., 4.), (5., 100.)].iter() {
+        time_ranges_a.add(range.0, range.1).unwrap();
+    }
+    let expected = "[0,2), [3,4), [5,100)";
+    check(&time_ranges_a, expected);
+
+    let mut time_ranges_b = TimeRangesContainer::new();
+    // Add the values in time_ranges_a to time_ranges_b in reverse order.
+    for i in (0..time_ranges_a.len()).rev() {
+        time_ranges_b
+            .add(
+                time_ranges_a.start(i).unwrap(),
+                time_ranges_a.end(i).unwrap(),
+            )
+            .unwrap();
+    }
+    check(&time_ranges_b, expected);
+}
+
+#[test]
+fn add_overlapping() {
+    let mut time_ranges = TimeRangesContainer::new();
+
+    time_ranges.add(0., 2.).unwrap();
+    time_ranges.add(10., 11.).unwrap();
+    check(&time_ranges, "[0,2), [10,11)");
+
+    time_ranges.add(0., 2.).unwrap();
+    check(&time_ranges, "[0,2), [10,11)");
+
+    time_ranges.add(2., 3.).unwrap();
+    check(&time_ranges, "[0,3), [10,11)");
+
+    time_ranges.add(2., 6.).unwrap();
+    check(&time_ranges, "[0,6), [10,11)");
+
+    time_ranges.add(9., 10.).unwrap();
+    check(&time_ranges, "[0,6), [9,11)");
+
+    time_ranges.add(8., 10.).unwrap();
+    check(&time_ranges, "[0,6), [8,11)");
+
+    time_ranges.add(-1., 7.).unwrap();
+    check(&time_ranges, "[-1,7), [8,11)");
+
+    time_ranges.add(6., 9.).unwrap();
+    check(&time_ranges, "[-1,11)");
+}