molstar/lib/mol-data/util/_spec/combination.spec.js

A comprehensive macromolecular library.

/**
 * Copyright (c) 2018 mol* contributors, licensed under MIT, See LICENSE file for more info.
 *
 * @author Alexander Rose <alexander.rose@weirdbyte.de>
 */
import { combinations } from '../combination';
describe('Combination', function () {
    it('test123-2', function () {
        var c = combinations([1, 2, 3], 2);
        expect(c).toEqual([[1, 2], [1, 3], [2, 3]]);
    });
    it('test1234-2', function () {
        var c = combinations([1, 2, 3, 4], 2);
        expect(c).toEqual([[1, 2], [1, 3], [2, 3], [1, 4], [2, 4], [3, 4]]);
    });
    it('test1234-1', function () {
        var c = combinations([1, 2, 3, 4], 1);
        expect(c).toEqual([[1], [2], [3], [4]]);
    });
    it('test1234-4', function () {
        var c = combinations([1, 2, 3, 4], 4);
        expect(c).toEqual([[1, 2, 3, 4]]);
    });
});
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