def "getArgumentValues: invalid oneOf input validation applied with list of input type"() {
        given: "schema defining input object"
        def inputObjectType = newInputObject()
                .name("oneOfInputObject")
                .withAppliedDirective(Directives.OneOfDirective.toAppliedDirective())
                .field(newInputObjectField()
                        .name("a")
                        .type(GraphQLString)
                        .build())
                .field(newInputObjectField()
                        .name("b")
                        .type(GraphQLInt)
                        .build())
                .build()

        def inputValue = buildObjectLiteral([
                oneOfField: [
                        a: StringValue.of("abc"),
                        b: IntValue.of(123)
                ]
        ])
        def inputArray = ArrayValue.newArrayValue().value(inputValue).build()

        def argument = new Argument("arg", inputArray)

        when:
        def fieldArgumentList = newArgument().name("arg").type(list(inputObjectType)).build()
        ValuesResolver.getArgumentValues([fieldArgumentList], [argument], CoercedVariables.emptyVariables(), graphQLContext, locale)

        then:
        def e = thrown(OneOfTooManyKeysException)
        e.message == "Exactly one key must be specified for OneOf type 'oneOfInputObject'."
    }