scanner: Add a function for clearing the TaskQueue

And call this function when closing the player

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

emmental.py

@@ -4,6 +4,7 @@ import lib
 lib.settings.load()
 
 import db
+import scanner
 import ui
 from gi.repository import Gtk
 
@@ -22,6 +23,7 @@ class Application(Gtk.Application):
 
     def do_shutdown(self):
         Gtk.Application.do_shutdown(self)
+        scanner.Queue.clear()
         db.sql.optimize()
 
 if __name__ == "__main__":

scanner/queue.py

@@ -17,6 +17,9 @@ class TaskQueue(GObject.GObject):
     def push(self, task):
         self.emit("task-pushed", task)
 
+    def clear(self):
+        self.emit("tasks-finished")
+
     def run(self):
         self.emit("run-task", self.tasks.pop(0))
         if len(self.tasks) > 0:

scanner/test_queue.py

@@ -42,6 +42,16 @@ class TestTaskQueue(unittest.TestCase):
         self.assertIsNotNone(q.idleid)
         self.assertEqual(self.pushed_task, fake)
 
+    def test_clear(self):
+        q = queue.TaskQueue()
+        q.connect("tasks-finished", self.on_tasks_finished)
+
+        q.push(FakeTask())
+        q.clear()
+        self.assertEqual(q.tasks, [ ])
+        self.assertTrue(self.tasks_finished)
+        self.assertIsNone(q.idleid)
+
     def test_run(self):
         q = queue.TaskQueue()
         fake3 = FakeTask()