FreeAllMedia/mrt

import Component from "../../lib/component/component.js";

describe(".properties.then(thenFunction)", () => {
    let numbers,
            actualContext,
            results,
            returnValue;

    class Numbers extends Component {
        initialize() {
            returnValue = this.properties("values")
                .multi.aggregate.flat
                .then(function (value) {
                    actualContext = this;
                    results.push(value);
                });
        }
    }

    beforeEach(() => {
        actualContext = null;
        results = [];
        numbers = new Numbers();
    });

    it("should return this when setting to enable chaining", () => {
        const propertyCollection = numbers.propertyCollections()[0];
        returnValue.should.eql(propertyCollection);
    });

    it("should call .then each time the property has a value set", () => {
        numbers
            .values("1")
            .values("2")
            .values("3");
        results.should.eql([ "1", "2", "3" ]);
    });

    it("should be called with the correct context", () => {
        numbers.values("1");
        actualContext.should.eql(numbers);
    });
});