parallel-es/test/common/parallel/slave/times-iterator.specs.ts

Simple parallelization for EcmaScript

import {toArray} from "../../../../src/common/util/arrays";
import {timesIterator} from "../../../../src/common/parallel/slave/times-iterator";
import {IParallelTaskEnvironment} from "../../../../src/common/parallel";

describe("timesIterator", function () {
    let environment: IParallelTaskEnvironment;

    beforeEach(function () {
        environment = { taskIndex: 2, valuesPerTask: 2 };
    });

    it("returns an iterator that generates the elements using the generator function", function () {
        // arrange
        const generatorSpy = jasmine.createSpy("generator");
        const iterator = timesIterator(5, 10, generatorSpy, environment);

        // act
        toArray(iterator);

        // assert
        expect(generatorSpy).toHaveBeenCalledTimes(5);
    });

    it("returns an iterator containing the elements created by the generator", function () {
        // arrange
        const iterator = timesIterator(5, 10, n => n * 2, environment);

        // act, assert
        expect(toArray(iterator)).toEqual([10, 12, 14, 16, 18]);
    });
});