import { Set } from './Set';

describe('Set', function() {
	it('Should init a new set', function() {
		const set = new Set();
		expect(set).not.toBeNull();
		expect(set.size).toBe(0);
	});

	it('Should add itens to a new set', function() {
		var set = new Set();
		set.add('a');
		set.add('b');
		expect(set.size).toBe(2);
		expect(set.has('a')).toBe(true);
		expect(set.has('b')).toBe(true);
		expect(set.values).toEqual(['a', 'b']);
	});

	it('Should remove a specific item from a set', function() {
		var set = new Set();
		set.add('a');
		set.remove('a');
		expect(set.size).toBe(0);
		expect(set.has('a')).toBe(false);
	});

	it('Should return a new set with the intersection of two others set', function() {
		var setA = new Set();
		var setB = new Set();
		setA.add('a');
		setA.add('b');
		setA.add('c');
		setB.add('a');
		setB.add('c');
		setB.add('z');

		var intersectSet = setA.intersection(setB);

		expect(intersectSet.size).toBe(2);
		expect(intersectSet.values).toEqual(['a', 'c']);
	});

	it('Should return a new set with the diference of two others set', function() {
		var setA = new Set();
		var setB = new Set();
		setA.add('a');
		setA.add('b');
		setA.add('c');
		setB.add('a');
		setB.add('c');
		setB.add('z');

		var diffSet = setA.difference(setB);

		expect(diffSet.size).toBe(1);
		expect(diffSet.values).toEqual(['b']);
	});

	it('Should determine if a set is a subset of another set', function() {
		var setA = new Set();
		var setB = new Set();

		setA.add('a');
		setA.add('b');
		setA.add('c');
		setA.add('d');

		setB.add('a');
		setB.add('b');

		expect(setB.subset(setA)).toBe(true);
	});
});