test: add StreamController#start/stop test

tests/unit/controller/stream-controller.js

@@ -4,8 +4,10 @@ import Hls from "../../../src/hls";
 import Event from "../../../src/events";
 import { FragmentTracker } from "../../../src/helper/fragment-tracker";
 import StreamController, { State } from "../../../src/controller/stream-controller";
+import M3U8Parser from "../../../src/loader/m3u8-parser";
 
 /**
+ * Create StreamController instance with initial setting
  * @returns {{hls: Hls, streamController: StreamController}}
  */
 const createStreamController = () => {
@@ -17,16 +19,57 @@ const createStreamController = () => {
   };
 };
 
+/**
+ * Assert: streamController should be started
+ * @param {StreamController} streamController
+ */
+const assertStreamControllerStarted = (streamController) => {
+  assert.equal(streamController.hasInterval(), true, "StreamController should start interval");
+  assert.notDeepEqual(streamController.state, State.STOPPED, "StreamController's state should not be STOPPED");
+};
+
+/**
+ * Assert: streamController should be stopped
+ * @param {StreamController} streamController
+ */
+const assertStreamControllerStopped = (streamController) => {
+  assert.equal(streamController.hasInterval(), false, "StreamController should stop interval");
+  assert.equal(streamController.state, State.STOPPED, "StreamController's state should be STOPPED");
+};
+
 describe("StreamController", function() {
-  it("initial state should be STOPPED", function() {
+  it("should be STOPPED when it is initialized", function() {
     const { streamController } = createStreamController();
-    assert.equal(streamController.state, State.STOPPED);
+    assertStreamControllerStopped(streamController);
   });
+
   it("should trigger STREAM_STATE_TRANSITION when state is updated", function() {
     const { hls, streamController } = createStreamController();
     const spy = sinon.spy();
     hls.on(Event.STREAM_STATE_TRANSITION, spy);
     streamController.state = State.ENDED;
     assert.deepEqual(spy.args[0][1], { previousState: State.STOPPED, nextState: State.ENDED });
   });
+
+  it("should not start when controller have not levels data", function() {
+    const { streamController } = createStreamController();
+    streamController.startLoad(1);
+    assertStreamControllerStopped(streamController);
+  });
+
+  it("should start when controller have levels data", function() {
+    const { streamController } = createStreamController();
+    const manifest = `#EXTM3U
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=836280,RESOLUTION=848x360,NAME="480"
+http://proxy-62.dailymotion.com/sec(3ae40f708f79ca9471f52b86da76a3a8)/video/107/282/158282701_mp4_h264_aac_hq.m3u8#cell=core`;
+    const levels = M3U8Parser.parseMasterPlaylist(manifest, 'http://www.dailymotion.com');
+    // load levels data
+    streamController.onManifestParsed({
+      levels
+    });
+    streamController.startLoad(1);
+    assertStreamControllerStarted(streamController);
+    streamController.stopLoad();
+    assertStreamControllerStopped(streamController)
+  });
 });