Bug 1653602 - Add a geolocation monitor r=baku

Differential Revision: https://phabricator.services.mozilla.com/D85938

dom/geolocation/Geolocation.cpp

@@ -413,6 +413,10 @@ void nsGeolocationRequest::SendLocation(nsIDOMGeoPosition* aPosition) {
     Shutdown();
   }
 
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  obs->NotifyObservers(wrapped, "geolocation-position-events",
+                       u"location-updated");
+
   nsAutoMicroTask mt;
   if (mCallback.HasWebIDLCallback()) {
     RefPtr<PositionCallback> callback = mCallback.GetWebIDLCallback();

dom/tests/unit/test_geolocation_monitor.js

@@ -0,0 +1,100 @@
+const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+let geolocation = null;
+let numRequests = 0;
+let locations = [
+  [1, 2],
+  [3, 4],
+  [5, 6],
+];
+
+function geoHandler(metadata, response) {
+  numRequests++;
+  let [lat, lng] = locations.shift();
+  response.setStatusLine("1.0", 200, "OK");
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader("Content-Type", "application/x-javascript", false);
+  response.write(
+    JSON.stringify({
+      status: "OK",
+      location: { lat, lng },
+      accuracy: 42,
+    })
+  );
+}
+
+function toJSON(pos) {
+  return { lat: pos.coords.latitude, lng: pos.coords.longitude };
+}
+
+function getPosition() {
+  return new Promise(function(resolve, reject) {
+    geolocation.getCurrentPosition(resolve, reject);
+  });
+}
+
+function watchPosition() {
+  let seen = 0;
+  return new Promise(function(resolve, reject) {
+    let id = geolocation.watchPosition(position => {
+      seen++;
+      if (seen === 1) {
+        Assert.deepEqual(toJSON(position), { lat: 3, lng: 4 });
+        Assert.deepEqual(observer._lastData, { lat: 3, lng: 4 });
+        Assert.equal(observer._countEvents, 2);
+      } else if (seen === 2) {
+        Assert.deepEqual(toJSON(position), { lat: 5, lng: 6 });
+        Assert.deepEqual(observer._lastData, { lat: 5, lng: 6 });
+        Assert.equal(observer._countEvents, 3);
+        geolocation.clearWatch(id);
+        resolve();
+      }
+    }, reject);
+  });
+}
+
+let observer = {
+  QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+
+  observe(subject, topic, data) {
+    Assert.equal(topic, "geolocation-position-events");
+    observer._countEvents++;
+    observer._lastData = toJSON(subject);
+  },
+
+  _lastData: null,
+  _countEvents: 0,
+};
+
+add_task(async function test_resetClient() {
+  do_get_profile();
+  geolocation = Cc["@mozilla.org/geolocation;1"].getService(Ci.nsISupports);
+
+  let server = new HttpServer();
+  server.registerPathHandler("/geo", geoHandler);
+  server.start(-1);
+
+  Services.prefs.setCharPref(
+    "geo.provider.network.url",
+    "http://localhost:" + server.identity.primaryPort + "/geo"
+  );
+  Services.prefs.setBoolPref(
+    "geo.provider.network.debug.requestCache.enabled",
+    false
+  );
+  Services.prefs.setBoolPref("geo.provider.network.scan", false);
+
+  var obs = Cc["@mozilla.org/observer-service;1"].getService();
+  obs = obs.QueryInterface(Ci.nsIObserverService);
+  obs.addObserver(observer, "geolocation-position-events");
+
+  let position = await getPosition();
+  Assert.deepEqual(toJSON(position), { lat: 1, lng: 2 });
+  Assert.equal(observer._countEvents, 1);
+  Assert.deepEqual(observer._lastData, { lat: 1, lng: 2 });
+
+  await watchPosition();
+
+  await new Promise(resolve => server.stop(resolve));
+});

dom/tests/unit/xpcshell.ini

@@ -5,6 +5,7 @@ head =
 [test_bug465752.js]
 [test_Fetch.js]
 [test_geolocation_provider.js]
+[test_geolocation_monitor.js]
 [test_geolocation_timeout.js]
 [test_geolocation_timeout_wrap.js]
 skip-if = os == "mac" || os == "android"