graphicstextlist: Add tests

Author: ales-erjavec

Orange/widgets/utils/tests/test_graphicstextlist.py

@@ -0,0 +1,87 @@
+import unittest
+
+from AnyQt.QtCore import Qt, QSizeF
+
+from orangewidget.tests.base import GuiTest
+from Orange.widgets.utils.graphicstextlist import TextListWidget, scaled
+
+
+class TestTextListWidget(GuiTest):
+    def test_setItems(self):
+        w = TextListWidget()
+        w.setItems([])
+        self.assertEqual(w.count(), 0)
+        w.setItems(["Aa"])
+        self.assertEqual(w.count(), 1)
+        w.setItems(["Aa", "Bb"])
+        self.assertEqual(w.count(), 2)
+        w.clear()
+        self.assertEqual(w.count(), 0)
+        w.clear()
+
+    def test_orientation(self):
+        w = TextListWidget()
+        w.setItems(['x' * 20] * 2)
+        w.setOrientation(Qt.Vertical)
+        self.assertEqual(w.orientation(), Qt.Vertical)
+        sh = w.effectiveSizeHint(Qt.PreferredSize)
+        self.assertGreater(sh.width(), sh.height())
+        w.setOrientation(Qt.Horizontal)
+        sh = w.effectiveSizeHint(Qt.PreferredSize)
+        self.assertLess(sh.width(), sh.height())
+
+    def test_alignment(self):
+        w = TextListWidget()
+        w.setItems(["a"])
+        w.resize(200, 100)
+        w.setAlignment(Qt.AlignRight)
+        self.assertEqual(w.alignment(), Qt.AlignRight)
+        item = w.childItems()[0].childItems()[0]
+
+        def brect(item):
+            return item.mapRectToItem(w, item.boundingRect())
+
+        self.assertEqual(brect(item).right(), 200)
+        w.setAlignment(Qt.AlignLeft)
+        self.assertEqual(brect(item).left(), 0)
+
+        w.setAlignment(Qt.AlignHCenter)
+        self.assertTrue(90 <= brect(item).center().x() < 110)
+
+        w.setAlignment(Qt.AlignTop)
+        self.assertEqual(brect(item).top(), 0)
+
+        w.setAlignment(Qt.AlignBottom)
+        self.assertEqual(brect(item).bottom(), 100)
+
+        w.setAlignment(Qt.AlignVCenter)
+        self.assertTrue(45 <= brect(item).center().y() < 55)
+
+
+class TestUtils(unittest.TestCase):
+    def test_scaled(self):
+        cases_keep_aspect = [
+            (QSizeF(100, 100), QSizeF(200, 300), QSizeF(200, 200)),
+            (QSizeF(100, 100), QSizeF(300, 200), QSizeF(200, 200)),
+            (QSizeF(100, 100), QSizeF(300, -1), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(-1, 300), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(-1, -1), QSizeF(100, 100)),
+        ]
+        for size, const, expected in cases_keep_aspect:
+            s = scaled(size, const)
+            self.assertEqual(s, expected, f"scaled({size}, {const})")
+
+        cases_keep_aspect_by_expaindig = [
+            (QSizeF(100, 100), QSizeF(200, 300), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(300, 200), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(300, -1), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(-1, 300), QSizeF(300, 300)),
+            (QSizeF(100, 100), QSizeF(-1, -1), QSizeF(100, 100)),
+        ]
+
+        for size, const, expected in cases_keep_aspect_by_expaindig:
+            s = scaled(size, const, Qt.KeepAspectRatioByExpanding)
+            self.assertEqual(
+                s, expected,
+                f"scaled({size}, {const}, Qt.KeepAspectRatioByExpanding)"
+            )