tests: add a few basic unit tests for WindowProperties class

tests/display/test_winprops.py

@@ -0,0 +1,68 @@
+from panda3d.core import WindowProperties
+
+import pytest
+
+
+def test_winprops_ctor():
+    props = WindowProperties()
+    assert not props.is_any_specified()
+
+
+def test_winprops_copy_ctor():
+    props = WindowProperties()
+    props.set_size(1, 2)
+
+    props2 = WindowProperties(props)
+    assert props == props2
+    assert props2.get_size() == (1, 2)
+
+    with pytest.raises(TypeError):
+        WindowProperties(None)
+
+
+def test_winprops_ctor_kwargs():
+    props = WindowProperties(size=(1, 2), origin=3)
+
+    assert props.has_size()
+    assert props.get_size() == (1, 2)
+
+    assert props.has_origin()
+    assert props.get_origin() == (3, 3)
+
+    # Invalid property should throw
+    with pytest.raises(TypeError):
+        WindowProperties(swallow_type="african")
+
+    # Invalid value should throw
+    with pytest.raises(TypeError):
+        WindowProperties(size="invalid")
+
+
+def test_winprops_size_staticmethod():
+    props = WindowProperties.size(1, 2)
+    assert props.has_size()
+    assert props.get_size() == (1, 2)
+
+    props = WindowProperties.size((1, 2))
+    assert props.has_size()
+    assert props.get_size() == (1, 2)
+
+
+def test_winprops_size_property():
+    props = WindowProperties()
+
+    # Test get
+    props.set_size(1, 2)
+    assert props.size == (1, 2)
+
+    # Test has
+    props.clear_size()
+    assert props.size is None
+
+    # Test set
+    props.size = (4, 5)
+    assert props.get_size() == (4, 5)
+
+    # Test clear
+    props.size = None
+    assert not props.has_size()