Also update preferred event when manually launching RAVEN alert; fixes #550

This MR fixes #550 (closed) by ensuring the events we indicate we want to send out is the one included in the alert by changing the preferred external event to the given external event.

gwcelery/tests/test_views.py

@@ -293,12 +293,34 @@ def test_download_upload_external_skymap(client, monkeypatch):
             skymap_link='https://url.fits.gz')
 
 
-def test_apply_raven_labels(client, monkeypatch):
+@pytest.mark.parametrize('search,time_far,space_far', [
+    ('GRB', 1e-6, 1e-8),
+    ('SNEWS', None, None)
+])
+def test_apply_raven_labels(search, time_far, space_far,
+                            client, monkeypatch):
     """Test assigning a RAVEN alert."""
     mock_create_label = Mock()
+    mock_gracedb_download = Mock(return_value={
+        'temporal_coinc_far': time_far,
+        'spatiotemporal_coinc_far': space_far
+    })
+    mock_update_superevent = Mock()
+    mock_get_event = Mock(return_value={
+        'search': search
+    })
     monkeypatch.setattr(
         'gwcelery.tasks.gracedb.create_label.run',
         mock_create_label)
+    monkeypatch.setattr(
+        'gwcelery.tasks.gracedb.download',
+        mock_gracedb_download)
+    monkeypatch.setattr(
+        'gwcelery.tasks.gracedb.update_superevent',
+        mock_update_superevent)
+    monkeypatch.setattr(
+        'gwcelery.tasks.gracedb.get_event.run',
+        mock_get_event)
     response = client.post(url_for('apply_raven_labels'), data={
         'superevent_id': 'MS190208a',
         'ext_id': 'E12345',
@@ -309,6 +331,10 @@ def test_apply_raven_labels(client, monkeypatch):
          call('RAVEN_ALERT', 'E12345'),
          call('RAVEN_ALERT', 'G54321')]
     )
+    mock_update_superevent.assert_called_once_with(
+        'MS190208a', em_type='E12345',
+        time_coinc_far=time_far,  space_coinc_far=space_far
+    )
 
 
 def test_apply_raven_labels_no_data(client, monkeypatch):