Fix an issue with observing NaN heading coords

src/geolocation-observer.ts

@@ -78,9 +78,15 @@ export function createGeolocationObserver(
 
     nextMatcher: for (const matcher of matchers) {
       for (const property in matcher) {
+        const a = matcher[property as keyof typeof matcher];
+        const b = coords[property as keyof typeof coords];
+
         if (
-          matcher[property as keyof typeof matcher] !==
-          coords[property as keyof typeof coords]
+          a !== b &&
+          /* v8 ignore start: can't test without another execution context */
+          !(typeof a === "undefined" && typeof b === "undefined") &&
+          /* v8 ignore stop */
+          !(Number.isNaN(a) && Number.isNaN(b))
         ) {
           continue nextMatcher;
         }

test/vitest/geolocation-observer.spec.ts

@@ -244,6 +244,23 @@ describe("GeolocationObserver", () => {
       });
     });
 
+    describe("when called with a matcher with a NaN heading", () => {
+      it("resolves when the coords match", async () => {
+        locationServices.setLowAccuracyCoordinates({
+          ...coordsA,
+          heading: NaN,
+        });
+        permissionStore.setStatus({ name: "geolocation" }, "GRANTED");
+        await runTaskQueue();
+        const observer = createGeolocationObserver(geolocation, permissions);
+        await runTaskQueue();
+
+        await expect(
+          observer.waitForCoordinates({ heading: NaN }),
+        ).resolves.toBeUndefined();
+      });
+    });
+
     describe("when called with an async task function", () => {
       it("runs the task while waiting", async () => {
         locationServices.setLowAccuracyCoordinates(coordsA);