tests: add unit tests for direct.showbase.Loader.Loader class

tests/showbase/test_Loader.py

@@ -0,0 +1,70 @@
+from panda3d.core import Filename, NodePath
+from direct.showbase.Loader import Loader
+import pytest
+
+
+@pytest.fixture
+def loader():
+    return Loader(base=None)
+
+
+@pytest.fixture
+def temp_model():
+    from panda3d.core import ModelPool, ModelRoot
+
+    root = ModelRoot('model')
+    root.fullpath = '/test-model.bam'
+
+    ModelPool.add_model(root.fullpath, root)
+    yield root.fullpath
+    ModelPool.release_model(root.fullpath)
+
+
+def test_load_model_filename(loader, temp_model):
+    model = loader.load_model(Filename(temp_model))
+    assert model
+    assert isinstance(model, NodePath)
+    assert model.name == 'model'
+
+
+def test_load_model_str(loader, temp_model):
+    model = loader.load_model(str(temp_model))
+    assert model
+    assert isinstance(model, NodePath)
+    assert model.name == 'model'
+
+
+def test_load_model_list(loader, temp_model):
+    models = loader.load_model([temp_model, temp_model])
+    assert models
+    assert isinstance(models, list)
+    assert len(models) == 2
+    assert isinstance(models[0], NodePath)
+    assert isinstance(models[1], NodePath)
+
+
+def test_load_model_tuple(loader, temp_model):
+    models = loader.load_model((temp_model, temp_model))
+    assert models
+    assert isinstance(models, list)
+    assert len(models) == 2
+    assert isinstance(models[0], NodePath)
+    assert isinstance(models[1], NodePath)
+
+
+def test_load_model_set(loader, temp_model):
+    models = loader.load_model({temp_model})
+    assert models
+    assert isinstance(models, list)
+    assert len(models) == 1
+    assert isinstance(models[0], NodePath)
+
+
+def test_load_model_missing(loader):
+    with pytest.raises(IOError):
+        loader.load_model('/nonexistent.bam')
+
+
+def test_load_model_okmissing(loader):
+    model = loader.load_model('/nonexistent.bam', okMissing=True)
+    assert model is None