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90 lines
2.5 KiB
TypeScript
90 lines
2.5 KiB
TypeScript
import { expect } from "chai";
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import { Rectangle } from "@/lib/rects/rectangle";
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import { Vector2D } from "@/lib/rects/vector2d";
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describe("Rectangle Tests", () => {
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const v1 = new Vector2D(1, 2);
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const v2 = new Vector2D(4, 6);
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const r1 = new Rectangle(v1, v2);
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const r2 = new Rectangle(v2, v1);
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function check_rectangle(
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r: Rectangle,
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left: number,
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top: number,
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width: number,
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height: number,
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) {
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expect(r.left).to.equal(left);
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expect(r.top).to.equal(top);
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expect(r.width).to.equal(width);
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expect(r.height).to.equal(height);
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expect(r.area).to.equal(width * height);
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expect(r.middle.x).to.equal(left + 0.5 * width);
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expect(r.middle.y).to.equal(top + 0.5 * height);
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}
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it("should create a default rectangle", () => {
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check_rectangle(new Rectangle(), 0, 0, 0, 0);
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});
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it("should create a rectangle", () => {
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check_rectangle(r1, 1, 2, 3, 4);
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});
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it("should create the same rectangle backwards", () => {
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check_rectangle(r2, 1, 2, 3, 4);
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});
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it("should compare rectangles", () => {
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expect(r1.equals(r2)).to.be.true;
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expect(r1.equals(new Rectangle())).to.be.false;
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});
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it("should create the same rectangle transposed", () => {
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const v1t = new Vector2D(v1.x, v2.y);
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const v2t = new Vector2D(v2.x, v1.y);
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expect(r1.equals(new Rectangle(v1t, v2t))).to.be.true;
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});
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it("should contain itself", () => {
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expect(r1.contains(v1)).to.be.true;
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expect(r1.contains(v2)).to.be.true;
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expect(r1.contains(r1.origin)).to.be.true;
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expect(r1.contains(r1.corner)).to.be.true;
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expect(r1.contains(r1.middle)).to.be.true;
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});
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it("should not contain certain points", () => {
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expect(r1.contains(new Vector2D(0, 0))).to.be.false;
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expect(r1.contains(new Vector2D(100, 100))).to.be.false;
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});
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it("should update a rectangle", () => {
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const v = new Vector2D(1, 1);
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check_rectangle(r1.update(v1.plus(v), undefined), 2, 3, 2, 3);
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check_rectangle(r1.update(v1.minus(v), undefined), 0, 1, 4, 5);
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check_rectangle(r1.update(undefined, v2.plus(v)), 1, 2, 4, 5);
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check_rectangle(r1.update(undefined, v2.minus(v)), 1, 2, 2, 3);
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check_rectangle(r1.update(v1.plus(v), v2.plus(v)), 2, 3, 3, 4);
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check_rectangle(r1.update(v1.minus(v), v2.minus(v)), 0, 1, 3, 4);
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check_rectangle(r1.update(v1.minus(v), v2.plus(v)), 0, 1, 5, 6);
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check_rectangle(r1.update(v1.plus(v), v2.minus(v)), 2, 3, 1, 2);
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});
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it("should move a rectangle", () => {
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const v = new Vector2D(1, 1);
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check_rectangle(r1.move(v), 2, 3, 3, 4);
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});
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});
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