auto-t: add test for deauth after authentication

This code path is not exercised in the autotest but commonly does
happen in the real world. There is no associated bug with this, but
its helpful to have this event triggered in case something got
introduced in the future.

autotests/testWPA2/failure_test.py

@@ -8,11 +8,12 @@ import iwd
 from iwd import IWD
 from iwd import PSKAgent
 from iwd import NetworkType
+from hostapd import HostapdCLI
 import testutil
 
 class Test(unittest.TestCase):
 
-    def test_connection_success(self):
+    def test_incorrect_password(self):
         wd = IWD(True)
 
         psk_agent = PSKAgent("InvalidPassword")
@@ -34,6 +35,35 @@ class Test(unittest.TestCase):
 
         wd.unregister_psk_agent(psk_agent)
 
+    def test_deauth_after_connection(self):
+        wd = IWD(True)
+        hostapd = HostapdCLI(config="ssidWPA2.conf")
+
+        psk_agent = PSKAgent("secret123")
+        wd.register_psk_agent(psk_agent)
+
+        devices = wd.list_devices(1)
+        self.assertIsNotNone(devices)
+        device = devices[0]
+
+        ordered_network = device.get_ordered_network('ssidWPA2')
+
+        self.assertEqual(ordered_network.type, NetworkType.psk)
+
+        condition = 'not obj.connected'
+        wd.wait_for_object_condition(ordered_network.network_object, condition)
+
+        ordered_network.network_object.connect(wait=False)
+
+        device.wait_for_event("authenticating")
+
+        # Trigger a deauth just after authenticating
+        hostapd.deauthenticate(device.address)
+
+        device.wait_for_event("disconnected")
+
+        wd.unregister_psk_agent(psk_agent)
+
     @classmethod
     def setUpClass(cls):
         pass