def test_get_input_returns_json_string(binding_string):
input_ = json.loads(binding_string)
result = DurableOrchestrationClient._get_json_input(input_)
input_as_string = json.dumps(input_)
assert input_as_string == result
def test_get_input_returns_none_when_none_supplied():
result = DurableOrchestrationClient._get_json_input(None)
assert result is None
