snapshot of https://github.com/excalidraw/excalidraw.git (master, 2026-09-16; blobs > 131072B omitted)

packages/math/tests/segment.test.ts

@@ -0,0 +1,45 @@
+import { pointFrom } from "../src/point";
+import {
+  lineSegment,
+  lineSegmentIntersectionPoints,
+  isLineSegment,
+} from "../src/segment";
+
+describe("line-segment intersections", () => {
+  it("should correctly detect intersection", () => {
+    expect(
+      lineSegmentIntersectionPoints(
+        lineSegment(pointFrom(0, 0), pointFrom(5, 0)),
+        lineSegment(pointFrom(2, -2), pointFrom(3, 2)),
+      ),
+    ).toEqual(pointFrom(2.5, 0));
+  });
+  it("should correctly detect non-intersection", () => {
+    expect(
+      lineSegmentIntersectionPoints(
+        lineSegment(pointFrom(0, 0), pointFrom(5, 0)),
+        lineSegment(pointFrom(3, 1), pointFrom(4, 4)),
+      ),
+    ).toEqual(null);
+  });
+});
+describe("isLineSegment validation", () => {
+  it("should return true for a valid segment", () => {
+    expect(
+      isLineSegment([
+        [0, 0],
+        [1, 1],
+      ]),
+    ).toBe(true);
+  });
+
+  it("should return false if second element is not a point", () => {
+    const invalidSegment = [[0, 0], "not-a-point"] as any;
+
+    expect(isLineSegment(invalidSegment)).toBe(false);
+  });
+
+  it("should return false for wrong length", () => {
+    expect(isLineSegment([[0, 0]])).toBe(false);
+  });
+});