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

Simple parallelization for EcmaScript

import {mapIterator} from "../../../../src/common/parallel/slave/map-iterator";
import {toIterator, toArray} from "../../../../src/common/util/arrays";
import {IParallelTaskEnvironment} from "../../../../src/common/parallel";

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

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

    it("returns an iterator that has mapped all values using the passed iteratee", function () {
        // arrange
        const iterator = toIterator([1, 2, 3, 4]);
        const iteratee = (n: any) => n * 2;

        // act
        const result = mapIterator(iterator, iteratee, environment);

        // assert
        expect(toArray(result)).toEqual([2, 4, 6, 8]);
    });
});