def test_environment_merge_duplicate() -> None:
"""Test that the correct exception is thrown if duplicate entries exist."""
env1 = Environment("Env1")
env2 = Environment("Env2")
env1.register_backend(MockBackend)
env2.register_backend(MockBackend)
with pytest.raises(RuntimeError) as e:
env1.merge(env2)
assert e is not None
assert str(e.value) == \
"Attempted to merge two Environments that both contain: MockBoard"
def test_environment_merge() -> None:
"""Test that we can merge environments."""
env1 = Environment("Env1")
env2 = Environment("Env2")
assert len(env1.supported_boards) == 0
assert len(env2.supported_boards) == 0
env1.merge(env2)
assert len(env1.supported_boards) == 0
assert len(env2.supported_boards) == 0
env2.register_backend(MockBackend)
assert len(env2.supported_boards) == 1
env1.merge(env2)
assert len(env1.supported_boards) == 1
assert len(env2.supported_boards) == 1