Initial Watermaps import

2026-07-24 11:29:24 +02:00
commit 57f7b4dedb
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+import { act, cleanup, renderHook } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { useGeolocation } from "../src/hooks/useGeolocation";
+
+const originalGeolocation = Object.getOwnPropertyDescriptor(navigator, "geolocation");
+
+afterEach(() => {
+  cleanup();
+  if (originalGeolocation) Object.defineProperty(navigator, "geolocation", originalGeolocation);
+  else Reflect.deleteProperty(navigator, "geolocation");
+});
+
+describe("useGeolocation", () => {
+  it("derives COG only after movement exceeds GPS noise and clears the watch on stop", () => {
+    let success: PositionCallback | undefined;
+    const watchPosition = vi.fn((callback: PositionCallback) => {
+      success = callback;
+      return 23;
+    });
+    const clearWatch = vi.fn();
+    Object.defineProperty(navigator, "geolocation", {
+      configurable: true,
+      value: { watchPosition, clearWatch, getCurrentPosition: vi.fn() }
+    });
+    const { result } = renderHook(() => useGeolocation());
+
+    act(() => result.current.start());
+    act(() => success?.(positionAt(53, 7, 5, 1_000)));
+    expect(result.current.courseDeg).toBeNull();
+
+    act(() => success?.(positionAt(53, 7.00001, 5, 2_000)));
+    expect(result.current.courseDeg).toBeNull();
+
+    const receivedAtMs = Date.now();
+    act(() => success?.(positionAt(53, 7.0001, 5, 3_000)));
+    expect(result.current.courseDeg).toBeCloseTo(90, 0);
+    expect(result.current.timestampMs).toBeGreaterThanOrEqual(receivedAtMs);
+
+    act(() => result.current.stop());
+    expect(clearWatch).toHaveBeenCalledWith(23);
+    expect(result.current.status).toBe("idle");
+    expect(result.current.position).toBeNull();
+  });
+});
+
+function positionAt(lat: number, lon: number, accuracy: number, timestamp: number): GeolocationPosition {
+  return {
+    coords: {
+      latitude: lat,
+      longitude: lon,
+      accuracy,
+      altitude: null,
+      altitudeAccuracy: null,
+      heading: null,
+      speed: 3,
+      toJSON: () => ({})
+    },
+    timestamp,
+    toJSON: () => ({})
+  };
+}