CS2613/labs/L09/spec/loop-arith.spec.js

let arith=require ("../loop-arith.js");

describe("plus",
	 function() {
		it("1 + 1 = 2",
			function() {
				expect(arith.plus(1, 1)).toBe(2);
			});
		 it("0 + x = x",
			function() {
				expect(arith.plus(0, 1)).toBe(1);
			});
	});

describe("mult",
	 function() {
		 it("0 * 2 = 0",
		 	function() {
				expect(arith.mult(0, 2)).toBe(0);
			});

		 it("1 * 2 = 2",
			function() {
				expect(arith.mult(1,2)).toBe(2);
			});
		 it("2 * 2 = 4",
			function() {
				expect(arith.mult(2, 2)).toBe(4);
			});
	 });

describe("minus",
	 function() {
		it("1 - 1 = 0",
			function() {
				expect(arith.minus(1, 1)).toBe(0);
			});

		it("0 - x = -x",
			function() {
				expect(arith.minus(0, 1)).toBe(-1);
	 		});
	});