removed fixture, simplified test

Co-authored-by: Ben Kantor <benkantor@gmail.com>

tests/unit_tests/gui/test_atlas_section.py

@@ -10,23 +10,11 @@
 from slicereg.gui.view_models.atlas_section import AtlasSectionViewModel
 
 
-@pytest.fixture
-def view_model() -> AtlasSectionViewModel:
-    MockCommandProvider = Mock(CommandProvider)
-    MockSignal = Mock(Signal)
-    model = AppModel(MockCommandProvider())
-    updated = MockSignal()
-    view_model = AtlasSectionViewModel(axis=0, _model=model, updated=updated)
-    return view_model
-
-
 cases = [
     (0, 'coronal_section_image'),
     (1, 'axial_section_image'),
     (2, 'sagittal_section_image'),
 ]
-
-
 @pytest.mark.parametrize("axis, section_attr", cases)
 def test_app_model_coronal_section_is_the_first_axis_of_the_atlas_volume_and_at_the_first_atlas_section_coordinate(axis, section_attr):
     atlas_volume = np.random.randint(0, 100, (10, 10, 10), np.uint16)
@@ -44,13 +32,12 @@ def test_coronal_section_view_model_displays_the_coronal_section_image():
     npt.assert_equal(app_model.coronal_section_image, view_model.section_image)
 
 
-
-def test_update_coords(view_model: AtlasSectionViewModel):
-    app_model = view_model._model
-    app_model.atlas_volume = np.random.randint(0, 100, (10, 10, 10), np.uint16)
-    app_model.atlas_section_coords = (1, 2, 3)
-    expected = (2, 3)
-
-    args, kwargs = view_model.updated.emit.call_args
-    result = kwargs['dto'].coords
-    npt.assert_equal(result, expected)
+def test_update_coords():
+    model = AppModel(
+        _commands=Mock(CommandProvider),
+        atlas_volume=np.random.randint(0, 100, (10, 10, 10), np.uint16),
+    )
+    view_model = AtlasSectionViewModel(axis=0, _model=model, updated=Mock(Signal))
+    model.atlas_section_coords = (1, 2, 3)
+    result = view_model.updated.emit.call_args[1]['dto']
+    npt.assert_equal(result.coords, (2, 3))