OWVolcanoPlot: general improvements, use of GeneScoring component

orangecontrib/bioinformatics/tests/widgets/ow_components/test_gene_scoring.py

@@ -0,0 +1,158 @@
+import unittest
+
+import numpy as np
+
+from AnyQt.QtCore import QItemSelection, QItemSelectionModel
+from AnyQt.QtTest import QSignalSpy
+
+from Orange.data import Table
+from Orange.preprocess import Remove
+from Orange.widgets.widget import OWWidget
+from Orange.widgets.settings import SettingProvider
+from Orange.widgets.tests.base import WidgetTest
+from Orange.widgets.tests.utils import simulate
+
+from orangecontrib.bioinformatics.utils.statistics import score_hypergeometric_test
+from orangecontrib.bioinformatics.widgets.ow_components import GeneScoringComponent
+
+
+class MockWidget(OWWidget):
+    name = "Mock"
+    scoring_component = SettingProvider(GeneScoringComponent)
+
+    def __init__(self):
+        self.scoring_component = GeneScoringComponent(self, self.mainArea)
+
+
+def iris_test_case(data: Table):
+    class TestGeneScoringComponent(WidgetTest):
+        def setUp(self):
+            self.widget = MockWidget()
+            self.component = self.widget.scoring_component
+
+        def test_expression_threshold_spinbox(self):
+            # find index of item in combobox for hypergeometric test
+            method_index, *_ = [
+                index
+                for index, (name, method) in enumerate(self.component.score_methods)
+                if method == score_hypergeometric_test
+            ]
+
+            # check if spinbox appears after hypergeometric test is selected
+            self.assertTrue(self.component.expression_threshold_box.isHidden())
+            simulate.combobox_activate_index(self.component.score_method_combo, method_index)
+            self.assertFalse(self.component.expression_threshold_box.isHidden())
+
+        def test_scoring_methods_combobox(self):
+            combo_box_values = [
+                self.component.score_method_combo.itemText(i) for i in range(self.component.score_method_combo.count())
+            ]
+            self.assertTrue(len(combo_box_values) > 0)
+            self.assertEqual([name for name, _ in self.component.score_methods], combo_box_values)
+
+            signals_cb_emits = QSignalSpy(self.component.score_method_changed)
+            simulate.combobox_run_through_all(self.component.score_method_combo)
+
+            self.assertEqual(self.component.score_method_combo.currentIndex(), self.component.current_method_index)
+            self.assertEqual(self.component.current_method_index, len(combo_box_values) - 1)
+
+            # number of signals combobox emits should be equal to the length of available scoring methods
+            self.assertEqual(len(combo_box_values), len(signals_cb_emits))
+
+        def test_selected_group_values(self):
+            self.assertIsNone(self.component.data)
+            self.component.initialize(data)
+            self.assertIsNotNone(self.component.data)
+
+            # we expect only one value 'iris'
+            combo_box_value, *_ = [
+                self.component.group_combo.itemText(i) for i in range(self.component.group_combo.count())
+            ]
+            self.assertEqual(combo_box_value, 'iris')
+
+            group_values = [
+                self.component.list_widget.item(i).text() for i in range(self.component.list_widget.count())
+            ]
+            self.assertEqual(group_values, ['Iris-setosa', 'Iris-versicolor', 'Iris-virginica'])
+
+        def test_selection(self):
+            self.component.initialize(data)
+            list_widget = self.component.list_widget
+            signals_cb_emits = QSignalSpy(self.component.selection_changed)
+
+            # get modelIndex from list widget
+            iris_setosa_index = list_widget.indexFromItem(list_widget.item(0))
+            iris_versicolor_index = list_widget.indexFromItem(list_widget.item(1))
+
+            # set selection
+            selection = QItemSelection()
+            selection.select(iris_setosa_index, iris_setosa_index)
+            selection.select(iris_versicolor_index, iris_versicolor_index)
+            list_widget.selectionModel().select(selection, QItemSelectionModel.ClearAndSelect)
+
+            # test if correct number of signals is emited
+            self.assertEqual(1, len(signals_cb_emits))
+            # test if selection is OK
+            self.assertEqual(2, len(list_widget.selectedItems()))
+
+            selection_mask = self.component.get_selection_mask()
+            _selection_mask = ~selection_mask
+
+            self.assertIsInstance(selection_mask, np.ndarray)
+            self.assertTrue(selection_mask.dtype == np.bool)
+
+            if 'iris' in data.domain:
+                # test selection mask
+                self.assertEqual(data.X[selection_mask, :].shape, (100, 4))
+
+                remover = Remove(class_flags=Remove.RemoveUnusedValues)
+                x1, x2 = remover(data[selection_mask, :]), remover(data[_selection_mask, :])
+
+                selected_row_values = x1.domain['iris'].values
+                unselected_row_values = x2.domain['iris'].values
+
+                self.assertTrue(len(selected_row_values) == 2)
+                self.assertIn('Iris-setosa', selected_row_values)
+                self.assertIn('Iris-versicolor', selected_row_values)
+                self.assertNotIn('Iris-virginica', selected_row_values)
+
+                self.assertTrue(len(unselected_row_values) == 1)
+                self.assertIn('Iris-virginica', unselected_row_values)
+            else:
+                # test selection mask
+                x = data.X
+                self.assertEqual(x[:, selection_mask].shape, (4, 100))
+                self.assertEqual(x[:, _selection_mask].shape, (4, 50))
+
+                selected_col_values = {
+                    col.attributes.get('iris')
+                    for col, selected in zip(data.domain.variables, selection_mask)
+                    if selected
+                }
+                unselected_col_values = {
+                    col.attributes.get('iris')
+                    for col, selected in zip(data.domain.variables, _selection_mask)
+                    if selected
+                }
+
+                self.assertTrue(len(selected_col_values) == 2)
+                self.assertIn('Iris-setosa', selected_col_values)
+                self.assertIn('Iris-versicolor', selected_col_values)
+                self.assertNotIn('Iris-virginica', selected_col_values)
+
+                self.assertTrue(len(unselected_col_values) == 1)
+                self.assertIn('Iris-virginica', unselected_col_values)
+
+    return TestGeneScoringComponent
+
+
+class TestRowGroup(iris_test_case(Table('iris'))):
+    pass
+
+
+class TestColumnGroup(iris_test_case(Table.transpose(Table('iris')))):
+    pass
+
+
+if __name__ == "__main__":
+    unittest.main()

orangecontrib/bioinformatics/utils/statistics.py

@@ -12,8 +12,9 @@
 ALTERNATIVES = [ALT_GREATER, ALT_TWO, ALT_LESS]
 
 
-def score_t_test(a, b, axis=0, alternative=ALT_TWO):
-    # type: (np.array, np.array, int, str) -> Tuple[Union[float, np.array], Union[float, np.array]]
+def score_t_test(
+    a: np.array, b: np.array, axis: int = 0, **kwargs
+) -> Tuple[Union[float, np.array], Union[float, np.array]]:
     """ Run t-test. Enable setting different alternative hypothesis.
     Probabilities are exact due to symmetry of the test.
 
@@ -24,7 +25,7 @@ def score_t_test(a, b, axis=0, alternative=ALT_TWO):
     scipy.stats.ttest_ind
 
     """
-    # alt = kwargs.get("alternative", ALT_TWO)
+    alternative = kwargs.get("alternative", ALT_TWO)
     assert alternative in ALTERNATIVES
     scores, pvalues = scipy.stats.ttest_ind(a, b, axis=axis)
 
@@ -41,7 +42,7 @@ def score_t_test(a, b, axis=0, alternative=ALT_TWO):
         return scores, 1.0 - pvalues
 
 
-def score_mann_whitney(a, b, **kwargs):
+def score_mann_whitney(a: np.array, b: np.array, **kwargs) -> Tuple[np.array, np.array]:
     axis = kwargs.get('axis', 0)
     a, b = np.asarray(a, dtype=float), np.asarray(b, dtype=float)
 
@@ -71,12 +72,15 @@ def score_mann_whitney(a, b, **kwargs):
     return np.array(statistics), np.array(p_values)
 
 
-def score_hypergeometric_test(a, b, threshold=1, **kwargs):
+def score_hypergeometric_test(a: np.array, b: np.array, threshold: float = 1.0, **kwargs) -> Tuple[np.array, np.array]:
     """
     Run a hypergeometric test. The probability in a two-sided test is approximated
     with the symmetric distribution with more extreme of the tails.
     """
-    # type: (np.ndarray, np.ndarray, float) -> np.ndarray
+    axis = kwargs.get('axis', 0)
+
+    if axis == 1:
+        a, b = a.T, b.T
 
     # Binary expression matrices
     _a = (a >= threshold).astype(int)