Update web-platform-tests to revision e03a9b1341ae9bdb1e4fa03765257b84d26fe2f1

tests/wpt/web-platform-tests/web-animations/resources/effect-tests.js

@@ -0,0 +1,68 @@
+// Common utility methods for testing animation effects
+
+// Tests the |property| member of |animation's| target effect's computed timing
+// at the various points indicated by |values|.
+//
+// |values| has the format:
+//
+//   {
+//     before, // value to test during before phase
+//     activeBoundary, // value to test at the very beginning of the active
+//                     // phase when playing forwards, or the very end of
+//                     // the active phase when playing backwards.
+//                     // This should be undefined if the active duration of
+//                     // the effect is zero.
+//     after,  // value to test during the after phase or undefined if the
+//             // active duration is infinite
+//   }
+//
+function assert_computed_timing_for_each_phase(animation, property, values) {
+  const effect = animation.effect;
+  const timing = effect.getComputedTiming();
+
+  // The following calculations are based on the definitions here:
+  // https://w3c.github.io/web-animations/#animation-effect-phases-and-states
+  const beforeActive = Math.max(Math.min(timing.delay, timing.endTime), 0);
+  const activeAfter =
+    Math.max(Math.min(timing.delay + timing.activeDuration, timing.endTime), 0);
+  const direction = animation.playbackRate < 0 ? 'backwards' : 'forwards';
+
+  // Before phase
+  if (direction === 'forwards') {
+    animation.currentTime = beforeActive - 1;
+  } else {
+    animation.currentTime = beforeActive;
+  }
+  assert_equals(effect.getComputedTiming()[property], values.before,
+                `Value of ${property} in the before phase`);
+
+  // Active phase
+  if (effect.getComputedTiming().activeDuration > 0) {
+    if (direction === 'forwards') {
+      animation.currentTime = beforeActive;
+    } else {
+      animation.currentTime = activeAfter;
+    }
+    assert_equals(effect.getComputedTiming()[property], values.activeBoundary,
+                  `Value of ${property} at the boundary of the active phase`);
+  } else {
+    assert_equals(values.activeBoundary, undefined,
+                  'Test specifies a value to check during the active phase but'
+                  + ' the animation has a zero duration');
+  }
+
+  // After phase
+  if (effect.getComputedTiming().activeDuration !== Infinity) {
+    if (direction === 'forwards') {
+      animation.currentTime = activeAfter;
+    } else {
+      animation.currentTime = activeAfter + 1;
+    }
+    assert_equals(effect.getComputedTiming()[property], values.after,
+                  `Value of ${property} in the after phase`);
+  } else {
+    assert_equals(values.after, undefined,
+                  'Test specifies a value to check during the after phase but'
+                  + ' the animation has an infinite duration');
+  }
+}