def test_get_component_by_name():
app = LightningApp(A())
assert app.get_component_by_name("root") is app.root
assert app.get_component_by_name("root.b") is app.root.b
assert app.get_component_by_name("root.w_a") is app.root.w_a
assert app.get_component_by_name("root.b.w_b") is app.root.b.w_b
assert app.get_component_by_name("root.b.c.d.e") is app.root.b.c.d.e
def test_get_component_by_name_raises():
app = LightningApp(A())
for name in ("", "ro", "roott"):
with pytest.raises(ValueError, match=f"Invalid component name {name}."):
app.get_component_by_name(name)
with pytest.raises(AttributeError, match="Component 'root' has no child component with name ''"):
app.get_component_by_name("root.")
with pytest.raises(AttributeError, match="Component 'root' has no child component with name 'x'"):
app.get_component_by_name("root.x")
with pytest.raises(AttributeError, match="Component 'root.b' has no child component with name 'x'"):
app.get_component_by_name("root.b.x")
with pytest.raises(AttributeError, match="Component 'root.b.w_b' has no child component with name 'c'"):
app.get_component_by_name("root.b.w_b.c")
