beforeAll(() => {
	jasmine.addMatchers({
		toBeNear: () => ({
			compare: (actual, expected, range) => {
				if(
					typeof expected !== 'number' ||
					typeof range !== 'number' ||
					range < 0
				) {
					throw new Error(
						'Invalid toBeNear(' + expected + ',' + range + ')'
					);
				}
				if(typeof actual !== 'number') {
					throw new Error('Expected a number, got ' + actual);
				}
				return {
					pass: Math.abs(actual - expected) <= range,
				};
			},
		}),
	});
});