Revert of Scroll interruption tests for CSSOM View smooth scroll

LayoutTests/fast/scroll-behavior/resources/scroll-interruption-test.js

-// A SmoothScrollInterruptionTest verifies that in-progress smooth scrolls
-// stop when interrupted by an instant scroll, another smooth scroll, a
-// touch scroll, or a mouse wheel scroll.
-//
-// The only SmoothScrollInerruptionTest method that should be called by
-// outside code is run().
-//
-// Creates a SmoothScrollInterruptionTest with arguments:
-// scrollElement - Element being scrolled.
-// innerPoint - Absolute position (expressed as a dictionary with x and y fields)
-//              of a point inside |scrollElement|, that can be used as the location
-//              of input events that trigger scrolls on |scrollElement|.
-// targets - A dictionary whose members y_min, y_mid, and y_max should be
-//           y co-ordinates that are far enough apart from each other that a
-//           smooth scroll between any pair of them will be non-trivial (that
-//           is, take multiple frames to finish), and should be such that
-//           y_min < y_mid < y_max.
-// jsScroll - Callback that takes a y co-ordinate and executes a js-driven
-//            smooth scroll to that y co-ordinate.
-function SmoothScrollInterruptionTest(scrollElement, innerPoint, targets, jsScroll) {
-    this.scrollElement = scrollElement;
-    this.innerPoint = innerPoint;
-    this.scrollStartPoint = targets.y_mid;
-    this.scrollEndPoint = targets.y_max;
-    this.scrollNewEndpoint = targets.y_min;
-    this.jsScroll = jsScroll;
-
-    this.testCases = [];
-    this.testCases.push(new SmoothScrollInterruptionTestCase(interruptWithInstantScroll, verifyScrollInterruptedByInstantScroll, "instant scroll"));
-    this.testCases.push(new SmoothScrollInterruptionTestCase(interruptWithSmoothScroll, verifyScrollInterruptedBySmoothScroll, "smooth scroll"));
-    this.testCases.push(new SmoothScrollInterruptionTestCase(interruptWithTouchScroll, verifyScrollInterruptedByInputDrivenScroll, "touch scroll"));
-    this.testCases.push(new SmoothScrollInterruptionTestCase(interruptWithWheelScroll, verifyScrollInterruptedByInputDrivenScroll, "wheel scroll"));
-
-    this.currentTestCase = 0;
-}
-
-SmoothScrollInterruptionTest.prototype.startNextTestCase = function() {
-    if (this.currentTestCase >= this.testCases.length) {
-        this.allTestCasesComplete();
-        return;
-    }
-
-    var testCase = this.testCases[this.currentTestCase];
-    this.asyncTest = async_test(testCase.description);
-
-    var scrollElement = this.scrollElement;
-    var scrollStartPoint = this.scrollStartPoint;
-
-    scrollElement.scrollTop = scrollStartPoint;
-    this.jsScroll(this.scrollEndPoint);
-    this.asyncTest.step(function() {
-        assert_equals(scrollElement.scrollTop, scrollStartPoint);
-    });
-
-    if (scrollElement.scrollTop == this.scrollEndPoint) {
-        // We've instant-scrolled, and failed the assert above.
-        this.testCaseComplete();
-        return;
-    }
-
-    window.requestAnimationFrame(this.waitForSmoothScrollStart.bind(this));
-}
-
-SmoothScrollInterruptionTest.prototype.waitForSmoothScrollStart = function() {
-    if (this.scrollElement.scrollTop == this.scrollStartPoint) {
-        window.requestAnimationFrame(this.waitForSmoothScrollStart.bind(this));
-        return;
-    }
-
-    var scrollElement = this.scrollElement;
-    var scrollEndPoint = this.scrollEndPoint;
-    this.asyncTest.step(function() {
-        assert_not_equals(scrollElement.scrollTop, scrollEndPoint);
-    });
-
-    var testCase = this.testCases[this.currentTestCase];
-    testCase.interruptSmoothScroll(this);
-    window.requestAnimationFrame(testCase.verifyScrollInterrupted.bind(testCase, this, this.testCaseComplete.bind(this)));
-}
-
-SmoothScrollInterruptionTest.prototype.testCaseComplete = function() {
-    this.asyncTest.done();
-
-    this.currentTestCase++;
-    this.startNextTestCase();
-}
-
-SmoothScrollInterruptionTest.prototype.run = function() {
-    setup({explicit_done: true});
-    this.startNextTestCase();
-}
-
-SmoothScrollInterruptionTest.prototype.allTestCasesComplete = function() {
-    done();
-}
-
-// A SmoothScrollInterruptionTestCase represents a single way of interrupting
-// a smooth scroll and verifying that the smooth scroll gets canceled.
-//
-// Creates a SmoothScrollInterruptionTestCase with arguments:
-// interruptSmoothScoll - Callback that takes a SmoothScrollInterruptionTest,
-//                        and interrupts the on-going smooth scroll.
-// verifyScrollInterrupted - Callback that takes a SmoothScrollInterruptionTest,
-//                           a |verificationComplete| callback, and a timestamp,
-//                           verifies (possibly asynchronously) that the smooth
-//                           scroll has been superseded by the interruption, and
-//                           then calls |verificationComplete|.
-// description - String describing this test case.
-function SmoothScrollInterruptionTestCase(interruptSmoothScroll, verifyScrollInterrupted, description) {
-    this.interruptSmoothScroll = interruptSmoothScroll;
-    this.verifyScrollInterrupted = verifyScrollInterrupted;
-    this.description = description;
-}
-
-
-function interruptWithInstantScroll(smoothScrollTest) {
-    smoothScrollTest.scrollElement.scrollTop = smoothScrollTest.scrollNewEndpoint;
-    smoothScrollTest.asyncTest.step(function() {
-        assert_equals(smoothScrollTest.scrollElement.scrollTop, smoothScrollTest.scrollNewEndpoint);
-    });
-}
-
-function verifyScrollInterruptedByInstantScroll(smoothScrollTest, verificationComplete) {
-    smoothScrollTest.asyncTest.step(function() {
-        assert_equals(smoothScrollTest.scrollElement.scrollTop, smoothScrollTest.scrollNewEndpoint);
-    });
-    verificationComplete();
-}
-
-function interruptWithSmoothScroll(smoothScrollTest) {
-    smoothScrollTest.jsScroll(smoothScrollTest.scrollNewEndpoint);
-    smoothScrollTest.asyncTest.step(function() {
-        assert_not_equals(smoothScrollTest.scrollElement.scrollTop, smoothScrollTest.scrollNewEndpoint);
-    });
-
-    this.scrollInterruptionPoint = smoothScrollTest.scrollElement.scrollTop;
-}
-
-function verifyScrollInterruptedBySmoothScroll(smoothScrollTest, verificationComplete) {
-    var currentPosition = smoothScrollTest.scrollElement.scrollTop;
-
-    if (currentPosition < this.scrollInterruptionPoint && currentPosition > smoothScrollTest.scrollNewEndpoint) {
-        verificationComplete();
-    } else {
-        window.requestAnimationFrame(this.verifyScrollInterrupted.bind(this, smoothScrollTest, verificationComplete));
-    }
-}
-
-function interruptWithTouchScroll(smoothScrollTest) {
-    if (window.eventSender) {
-        window.eventSender.gestureScrollBegin(smoothScrollTest.innerPoint.x, smoothScrollTest.innerPoint.y);
-        window.eventSender.gestureScrollUpdate(0, -10);
-        window.eventSender.gestureScrollEnd(0, 0);
-    } else {
-        document.write("This test does not work in manual mode.");
-    }
-}
-
-function verifyScrollInterruptedByInputDrivenScroll(smoothScrollTest, verificationComplete, timestamp) {
-    var currentPosition = smoothScrollTest.scrollElement.scrollTop;
-
-    if (this.previousPosition && this.previousPosition == currentPosition) {
-        // Ensure that the animation has really stopped, not that we just have
-        // two frames that are so close together that the animation only seems to
-        // have stopped.
-        if (timestamp - this.previousTimestamp > 16) {
-            verificationComplete();
-        } else {
-            window.requestAnimationFrame(this.verifyScrollInterrupted.bind(this, smoothScrollTest, verificationComplete));
-        }
-
-        return;
-    }
-
-    this.previousPosition = currentPosition;
-    this.previousTimestamp = timestamp;
-    smoothScrollTest.asyncTest.step(function() {
-        assert_not_equals(currentPosition, smoothScrollTest.scrollEndPoint);
-    });
-    window.requestAnimationFrame(this.verifyScrollInterrupted.bind(this, smoothScrollTest, verificationComplete));
-}
-
-function interruptWithWheelScroll(smoothScrollTest) {
-    if (window.eventSender) {
-        window.eventSender.mouseMoveTo(smoothScrollTest.innerPoint.x, smoothScrollTest.innerPoint.y);
-        window.eventSender.mouseScrollBy(0, -10);
-    } else {
-        document.write("This test does not work in manual mode.");
-    }
-}