test('or', function () {
		let filter: IFilter;
		let counters: number[];
		let newFilter = function (i: number, r: boolean): IFilter {
			return function (): IMatch[] { counters[i]++; return r as any; };
		};

		counters = [0, 0];
		filter = or(newFilter(0, false), newFilter(1, false));
		filterNotOk(filter, 'anything', 'anything');
		assert.deepEqual(counters, [1, 1]);

		counters = [0, 0];
		filter = or(newFilter(0, true), newFilter(1, false));
		filterOk(filter, 'anything', 'anything');
		assert.deepEqual(counters, [1, 0]);

		counters = [0, 0];
		filter = or(newFilter(0, true), newFilter(1, true));
		filterOk(filter, 'anything', 'anything');
		assert.deepEqual(counters, [1, 0]);

		counters = [0, 0];
		filter = or(newFilter(0, false), newFilter(1, true));
		filterOk(filter, 'anything', 'anything');
		assert.deepEqual(counters, [1, 1]);
	});

function filterOk(filter: IFilter, word: string, wordToMatchAgainst: string, highlights?: { start: number; end: number; }[]) {
	let r = filter(word, wordToMatchAgainst);
	assert(r);
	if (highlights) {
		assert.deepEqual(r, highlights);
	}
}

function filterNotOk(filter: IFilter, word: string, suggestion: string) {
	assert(!filter(word, suggestion));
}