16 lines
483 B
TypeScript
16 lines
483 B
TypeScript
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import { rotate } from "./math";
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describe("rotate", () => {
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it("should rotate over (x2, y2) and return the rotated coordinates for (x1, y1)", () => {
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const x1 = 10;
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const y1 = 20;
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const x2 = 20;
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const y2 = 30;
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const angle = Math.PI / 2;
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const [rotatedX, rotatedY] = rotate(x1, y1, x2, y2, angle);
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expect([rotatedX, rotatedY]).toEqual([30, 20]);
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const res2 = rotate(rotatedX, rotatedY, x2, y2, -angle);
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expect(res2).toEqual([x1, x2]);
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});
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});
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