Merge "[DO NOT MERGE ANYWHERE] Add swipes left method in Background.java" into rvc-dev

        mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, TASK_START_EVENT);

    }

    /** Swipes left to switch to the previous app. */

    public Background quickSwitchToPreviousAppSwipeLeft() {

        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();

            LauncherInstrumentation.Closable c =

                mLauncher.addContextLayer("want to quick switch to the previous app")) {

            verifyActiveContainer();

            quickSwitchToPreviousAppSwipeLeft(getExpectedStateForQuickSwitch());

            return new Background(mLauncher);

        }

    }

    protected void quickSwitchToPreviousAppSwipeLeft(int expectedState) {

        final boolean launcherWasVisible = mLauncher.isLauncherVisible();

        boolean transposeInLandscape = false;

        switch (mLauncher.getNavigationModel()) {

            case TWO_BUTTON:

                transposeInLandscape = true;

                // Fall through, zero button and two button modes behave the same.

            case ZERO_BUTTON: {

                final int startX;

                final int startY;

                final int endX;

                final int endY;

                if (mLauncher.getDevice().isNaturalOrientation() || !transposeInLandscape) {

                    // Swipe from the bottom right to the bottom left of the screen.

                    startX = mLauncher.getDevice().getDisplayWidth();

                    startY = getSwipeStartY();

                    endX = 0;

                    endY = startY;

                } else {

                    // Swipe from the bottom right to the top right of the screen.

                    startX = getSwipeStartX();

                    startY = mLauncher.getRealDisplaySize().y - 1;

                    endX = startX;

                    endY = 0;

                }

                final boolean isZeroButton =

                        mLauncher.getNavigationModel()

                        == LauncherInstrumentation.NavigationModel.ZERO_BUTTON;

                mLauncher.swipeToState(startX, startY, endX, endY, 20, expectedState,

                        launcherWasVisible && isZeroButton

                                ? LauncherInstrumentation.GestureScope.INSIDE_TO_OUTSIDE

                                : LauncherInstrumentation.GestureScope.OUTSIDE);

                break;

            }

            case THREE_BUTTON:

                // Double press the recents button.

                UiObject2 recentsButton = mLauncher.waitForSystemUiObject("recent_apps");

                mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, SQUARE_BUTTON_EVENT);

                mLauncher.runToState(() -> recentsButton.click(), OVERVIEW_STATE_ORDINAL);

                mLauncher.getOverview();

                mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, SQUARE_BUTTON_EVENT);

                recentsButton.click();

                break;

        }

        mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, TASK_START_EVENT);

    }

    protected String getSwipeHeightRequestName() {

        return TestProtocol.REQUEST_BACKGROUND_TO_OVERVIEW_SWIPE_HEIGHT;

    }