def test_key_error(self):
with pytest.raises(KeyError) as error:
traverse(data={"a": 42}, keys=["b"], original_path="...")
expected_error = KeyError(
f"Cannot access key 'b' in path '...', because of error: {repr(KeyError('b'))}."
)
assert str(error.value) == str(expected_error)
def test_index_error(self):
with pytest.raises(IndexError) as error:
traverse(data={"a": [42]}, keys=["a", 1], original_path="...")
expected_error = IndexError(
"Cannot access index '1' in path '...', "
f"because of error: {repr(IndexError('list index out of range'))}."
)
assert str(error.value) == str(expected_error)
def test_type_error(self, data, keys, original_path, failing_key,
failing_item_type):
with pytest.raises(TypeError) as error:
traverse(data=data, keys=keys, original_path=original_path)
expected_error = TypeError(
f"Cannot access key '{failing_key}' in path '{original_path}': "
f"the element must be a dictionary or a list but is of type '{failing_item_type}'."
)
assert str(error.value) == str(expected_error)
def test_traverse(self, data, keys, original_path, result):
assert traverse(data=data, keys=keys, original_path=original_path) == result