def test_empty_input_if_then():
def _fn_cond(x):
return x == 0
def _fn_then(x):
return x + 1
operation = substitution(["a"], replace_if_else(_fn_cond, _fn_then))
(res, err) = operation(None)
assert res is None
assert err == {'a': 'a not found'}
def test_cond_true_replace_if_then_default_else():
def _fn_cond(x):
return x == 0
def _fn_then(x):
return x + 1
operation = substitution(["a"], replace_if_else(_fn_cond, _fn_then))
(res, err) = operation({"a": 100})
assert res is not None
assert "a" in res
assert res["a"] == 100
assert err is None