platform/graphql_schema/test/validation_test.dart

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import 'package:graphql_schema/graphql_schema.dart';
import 'package:test/test.dart';
void main() {
var pokemonType = objectType('Pokémon', fields: [
field('name', type: graphQLString.nonNullable()),
]);
var isValidPokemon = predicate(
(x) =>
pokemonType.validate('@root', x as Map<String, dynamic>).successful,
'is a valid Pokémon');
var throwsATypeError =
throwsA(predicate((x) => x is TypeError, 'is a type error'));
test('mismatched scalar type', () {
expect(() => pokemonType.validate('@root', {'name': 24}), throwsATypeError);
});
test('empty passed for non-nullable', () {
expect(<String, dynamic>{}, isNot(isValidPokemon));
});
test('null passed for non-nullable', () {
expect({'name': null}, isNot(isValidPokemon));
});
test('rejects extraneous fields', () {
expect({'name': 'Vulpix', 'foo': 'bar'}, isNot(isValidPokemon));
});
}