test_unique_fragment_names.py

from functools import partial

from graphql.validation import UniqueFragmentNamesRule

from .harness import assert_validation_errors

assert_errors = partial(assert_validation_errors, UniqueFragmentNamesRule)

assert_valid = partial(assert_errors, errors=[])


def describe_validate_unique_fragment_names():
    def no_fragments():
        assert_valid(
            """
            {
              field
            }
            """
        )

    def one_fragment():
        assert_valid(
            """
            {
              ...fragA
            }
            fragment fragA on Type {
              field
            }
            """
        )

    def many_fragments():
        assert_valid(
            """
            {
              ...fragA
              ...fragB
              ...fragC
            }
            fragment fragA on Type {
              fieldA
            }
            fragment fragB on Type {
              fieldB
            }
            fragment fragC on Type {
              fieldC
            }
            """
        )

    def inline_fragments_are_always_unique():
        assert_valid(
            """
            {
              ...on Type {
                fieldA
              }
              ...on Type {
                fieldB
              }
            }
            """
        )

    def fragment_and_operation_named_the_same():
        assert_valid(
            """
            query Foo {
              ...Foo
            }
            fragment Foo on Type {
              field
            }
            """
        )

    def fragments_named_the_same():
        assert_errors(
            """
            {
              ...fragA
            }
            fragment fragA on Type {
              fieldA
            }
            fragment fragA on Type {
              fieldB
            }
            """,
            [
                {
                    "message": "There can be only one fragment named 'fragA'.",
                    "locations": [(5, 22), (8, 22)],
                },
            ],
        )

    def fragments_named_the_same_without_being_referenced():
        assert_errors(
            """
            fragment fragA on Type {
              fieldA
            }
            fragment fragA on Type {
              fieldB
            }
            """,
            [
                {
                    "message": "There can be only one fragment named 'fragA'.",
                    "locations": [(2, 22), (5, 22)],
                },
            ],
        )