def test_register_master(self):
'''
Test the two-way link between the PreviewPresenter as its MainViewPresenter master.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.register_master(self.mock_master_presenter)
self.mock_master_presenter.subscribe_preview_presenter.assert_called_once_with(
prev_presenter)
def test_create_preview_calls_add_to_list(self):
'''
Test that the PreviewPresenter calls the PreviewView's `_add_entry_to_list` method once with the expected text
once the data attribute has been set in the PreviewPresenter.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.set_dict(self.fake_data)
self.mock_preview_view.add_entry_to_list.assert_called_once_with(
self.fake_preview_text)
def test_create_preview_text(self):
'''
Test that the Preview text that is generated after setting the data contains the expected key and data
dimensions
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.set_dict(self.fake_data)
self.assertEqual(prev_presenter._create_preview_text(self.var_name),
self.fake_preview_text)
def test_create_preview_calls_select_first(self):
'''
Test that the function for selecting the first element on a list is called once a preview list has been
generated.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.set_dict(self.fake_data)
self.mock_preview_view.select_first_item.assert_called_once()
def test_create_preview_calls_clear_list(self):
'''
Test that any items that were previously on the list are removed once a file is loaded, and test that the
selection attribute on the PreviewView is reset.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.set_dict(self.fake_data)
self.mock_preview_view.clear_preview.assert_called_once()
self.mock_preview_view.reset_selection.assert_called_once()
def __init__(self, parent=None):
QListWidget.__init__(self, parent)
self._selected_item = None
self._presenter = PreviewPresenter(self)
self.itemSelectionChanged.connect(self.record_selection)
self.setMinimumWidth(200)
def test_call_to_create_preview_text(self):
'''
Test that the PreviewPresenter calls the `_create_preview_text` method once the `_add_preview_entry` method
has been called.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter._create_preview_text = mock.MagicMock()
prev_presenter._add_preview_entry(self.var_name)
prev_presenter._create_preview_text.assert_called_once_with(
self.var_name)
def test_get_selection(self):
'''
Test that the element-selection command causes the presenter to obtain information about the selection from the
view
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.register_master(self.mock_master_presenter)
prev_presenter.notify(Command.ELEMENTSELECTION)
self.mock_preview_view.get_selected_item.assert_called_once()
def test_bad_command_throws(self):
'''
Test that an unrecognised command passed to notify causes an exception to be thrown
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.register_master(self.mock_master_presenter)
# Create a fake Enum command
fake_enum = Enum(value='invalid', names=[('bad_command', -200000)])
with self.assertRaises(ValueError):
prev_presenter.notify(fake_enum.bad_command)
def test_selection_calls_default_plot(self):
'''
Test that making a selection on the PreviewView causes the MainViewPresenter to be alerted that a default plot
should be constructed.
'''
prev_presenter = PreviewPresenter(self.mock_preview_view)
prev_presenter.register_master(self.mock_master_presenter)
# Create a fake List Item containing a key and dimension information
fake_list_item = QListWidgetItem()
fake_list_item.setText("expected_key\n(2,3,2)")
# Instruct the mock PreviewView to return the fake List Item
self.mock_preview_view.get_selected_item = mock.MagicMock(
side_effect=lambda: fake_list_item)
prev_presenter.notify(Command.ELEMENTSELECTION)
'''
Check that the MainViewPresenter now attempts to create a plot for the key that is obtained from the
PreviewView
'''
self.mock_master_presenter.create_default_plot.assert_called_once_with(
"expected_key")
def test_presenter_throws_if_view_none(self):
'''
Ensure that the PreviewPresenter throws an exception when given a None PreviewView.
'''
with self.assertRaises(ValueError):
PreviewPresenter(None)