32 lines
867 B
TypeScript
32 lines
867 B
TypeScript
import { line, linesIntersectAt } from "../src/line";
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import { pointFrom } from "../src/point";
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describe("line-line intersections", () => {
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it("should correctly detect intersection at origin", () => {
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expect(
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linesIntersectAt(
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line(pointFrom(-5, -5), pointFrom(5, 5)),
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line(pointFrom(5, -5), pointFrom(-5, 5)),
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),
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).toEqual(pointFrom(0, 0));
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});
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it("should correctly detect intersection at non-origin", () => {
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expect(
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linesIntersectAt(
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line(pointFrom(0, 0), pointFrom(10, 10)),
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line(pointFrom(10, 0), pointFrom(0, 10)),
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),
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).toEqual(pointFrom(5, 5));
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});
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it("should correctly detect parallel lines", () => {
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expect(
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linesIntersectAt(
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line(pointFrom(0, 0), pointFrom(0, 10)),
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line(pointFrom(10, 0), pointFrom(10, 10)),
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),
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).toBe(null);
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});
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});
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