import 'reflect-metadata';

import {
    ThrottledMouseMoveDirective,
} from './throttled-mouse-move.directive';

const initThrottledMouseMoveDirective = (
) => {
    return new ThrottledMouseMoveDirective(
    );
};

describe('mousemove', () => {
    // tslint:disable-next-line
    test('It calls throttleMovement', () => {
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.throttleMovement =
            jest.fn();
        const event = {} as Event;

        throttledMousemoveDirective.mousemove(event);

        expect(
            throttledMousemoveDirective.throttleMovement,
        ).toHaveBeenCalledWith(event);
    });
});

describe('touchmove', () => {
    // tslint:disable-next-line
    test('It calls throttleMovement', () => {
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.throttleMovement =
            jest.fn();
        const event = {} as Event;

        throttledMousemoveDirective.touchmove(event);

        expect(
            throttledMousemoveDirective.throttleMovement,
        ).toHaveBeenCalledWith(event);
    });
});

describe('throttleMovement', () => {
    // tslint:disable-next-line
    test('If isEnabled is false it does not call onThrottledMouseMove.emit', () => {
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.isEnabled = false;
        throttledMousemoveDirective.onThrottledMouseMove.emit =
            jest.fn();

        throttledMousemoveDirective.throttleMovement({
        } as MouseEvent);

        expect(
            throttledMousemoveDirective
                .onThrottledMouseMove.emit,
        ).not.toBeCalled();
    });

    // tslint:disable-next-line
    test('It calls onThrottledMouseMove.emit with the mouseEvent if isEnabled is true', () => {
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.isEnabled = true;
        throttledMousemoveDirective.onThrottledMouseMove.emit =
            jest.fn();
        const mouseEvent = {} as MouseEvent;

        throttledMousemoveDirective.throttleMovement(mouseEvent);

        expect(
            throttledMousemoveDirective
                .onThrottledMouseMove.emit,
        ).toBeCalledWith(mouseEvent);
    });

    // tslint:disable-next-line
    test('It calls setTimeout with the supplied maxTriggersPerMilliseconds', () => {
        jest.useFakeTimers();
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.isEnabled = true;
        throttledMousemoveDirective.maxTriggersPerMilliseconds = 50;
        const mouseEvent = {} as MouseEvent;

        throttledMousemoveDirective.throttleMovement(mouseEvent);

        expect(setTimeout.mock.calls[0][1])
        .toBe(
            throttledMousemoveDirective
                .maxTriggersPerMilliseconds,
        );
    });

    // tslint:disable-next-line
    test('It sets isEnabled to false', () => {
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.isEnabled = true;
        throttledMousemoveDirective.maxTriggersPerMilliseconds = 50;
        const mouseEvent = {} as MouseEvent;

        throttledMousemoveDirective.throttleMovement(mouseEvent);

        expect(
            throttledMousemoveDirective.isEnabled,
        ).toBe(false);
    });

    // tslint:disable-next-line
    test('It sets isEnabled to true after the timeout has finished', () => {
        jest.useFakeTimers();
        const throttledMousemoveDirective =
            initThrottledMouseMoveDirective();
        throttledMousemoveDirective.isEnabled = true;
        throttledMousemoveDirective.maxTriggersPerMilliseconds = 50;
        const mouseEvent = {} as MouseEvent;

        throttledMousemoveDirective.throttleMovement(mouseEvent);

        jest.runAllTimers();

        expect(
            throttledMousemoveDirective.isEnabled,
        ).toBe(true);
    });
});