import 'reflect-metadata';

import {
    MultiFilterComponent,
} from './multi-filter.component';

const initMultiFilterComponent = () => {
    return new MultiFilterComponent();
};

describe('emitFiltersChanged', () => {
    // tslint:disable-next-line
    test('It calls onFiltersChanges.emit with the filters passed', () => {
        const multiFilterComponent = initMultiFilterComponent();
        const newFilters = ['abc', '123'];
        multiFilterComponent.onFiltersChanges.emit = jest.fn();

        multiFilterComponent.emitFiltersChanged(newFilters);

        expect(multiFilterComponent.onFiltersChanges.emit)
            .toHaveBeenCalledWith(newFilters);
    });
});

describe('showFilters', () => {
    // tslint:disable-next-line
    test('Outputs an event', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.onShowFilters.emit = jest.fn();

        multiFilterComponent.showFilters();

        expect(multiFilterComponent.onShowFilters.emit)
            .toHaveBeenCalled();
    });
});

describe('selectFilter', () => {
    // tslint:disable-next-line
    test('If the filter is not in the selectedFilters it calls emitFiltersChanged', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.emitFiltersChanged = jest.fn();
        multiFilterComponent.selectedFilters = [];
        multiFilterComponent.isSelected = jest.fn().mockReturnValueOnce(false);

        multiFilterComponent.selectFilter('test');

        expect(multiFilterComponent.emitFiltersChanged)
            .toHaveBeenCalledWith(['test']);
    });

    // tslint:disable-next-line
    test('If the filter is in the selectedFilters it does not call emitFiltersChanged', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.emitFiltersChanged = jest.fn();
        multiFilterComponent.selectedFilters = ['test'];
        multiFilterComponent.isSelected = jest.fn().mockReturnValueOnce(true);

        multiFilterComponent.selectFilter('test');

        expect(multiFilterComponent.emitFiltersChanged)
            .not.toHaveBeenCalled();
    });
});

describe('deselectFilter', () => {
    // tslint:disable-next-line
    test('It calls emitFiltersChanged', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.possibleFilters = ['test'];
        multiFilterComponent.emitFiltersChanged = jest.fn();

        multiFilterComponent.deselectFilter('test');

        expect(multiFilterComponent.emitFiltersChanged)
            .toHaveBeenCalledWith([]);
    });
});

describe('isSelected', () => {
    test('Is true if filters in the selected filters', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.selectedFilters = ['1', '2', '3'];

        const result = multiFilterComponent.isSelected('2');

        expect(result).toBe(true);
    });

    test('Is false if filters is not in the selected filters', () => {
        const multiFilterComponent = initMultiFilterComponent();
        multiFilterComponent.selectedFilters = ['1', '2', '3'];

        const result = multiFilterComponent.isSelected('4');

        expect(result).toBe(false);
    });
});