gecko/mobile/android/base/tests/PixelTest.java.in

#filter substitution
package @ANDROID_PACKAGE_NAME@.tests;

import @ANDROID_PACKAGE_NAME@.*;

class PixelTest extends BaseTest {
    private static final long PAINT_CLEAR_DELAY = 500; // milliseconds

    protected final int[][] loadAndPaint(String url) {
        Actions.RepeatedEventExpecter paintExpecter = mActions.expectPaint();
        loadUrl(url);
        paintExpecter.blockUntilClear(PAINT_CLEAR_DELAY);
        return mDriver.getPaintedSurface();
    }

    protected final int[][] waitForPaint(Actions.RepeatedEventExpecter expecter) {
        expecter.blockUntilClear(PAINT_CLEAR_DELAY);
        return mDriver.getPaintedSurface();
    }

    protected final int[][] waitWithNoPaint(Actions.RepeatedEventExpecter expecter) {
        try {
            Thread.sleep(PAINT_CLEAR_DELAY);
        } catch (InterruptedException ie) {
            ie.printStackTrace();
        }
        mAsserter.is(expecter.eventReceived(), false, "Checking gecko didn't draw unnecessarily");
        return mDriver.getPaintedSurface();
    }

    // this matches the algorithm in robocop_boxes.html
    protected final int[] getBoxColorAt(int x, int y) {
        x -= (x % 100);
        y -= (y % 100);
        int r = (x + y) % 255;
        int g = 255 - (y / 10);
        int b = 255 - (x / 10);
        return new int[] { r, g, b };
    }

    /**
     * Checks the top-left corner of the visible area of the page is at (x,y) of robocop_boxes.html.
     */
    protected final void checkScrollWithBoxes(int[][] painted, int x, int y) {
        int[] color = getBoxColorAt(x, y);
        mAsserter.ispixel(painted[0][0], color[0], color[1], color[2], "Pixel at 0, 0");
        color = getBoxColorAt(x + 100, y);
        mAsserter.ispixel(painted[0][100], color[0], color[1], color[2], "Pixel at 100, 0");
        color = getBoxColorAt(x, y + 100);
        mAsserter.ispixel(painted[100][0], color[0], color[1], color[2], "Pixel at 0, 100");
        color = getBoxColorAt(x + 100, y + 100);
        mAsserter.ispixel(painted[100][100], color[0], color[1], color[2], "Pixel at 100, 100");
    }

    /**
     * Loads the robocop_boxes.html file and verifies that we are positioned at (0,0) on it.
     * @param url URL of the robocop_boxes.html file.
     * @return The painted surface after rendering the file.
     */
    protected final int[][] loadAndVerifyBoxes(String url) {
        int[][] painted = loadAndPaint(url);
        checkScrollWithBoxes(painted, 0, 0);
        return painted;
    }
}