Variables in complex input types incorrectly validated as unused.

[nigel-sampson]

When a variable is used in a decomposed complex input types it is incorrectly validated as being unused.

The following unit test added to the test suite shows the scenario, this test fails with the error message The following variables were not used: name..

[Fact]
public void VariableUsedInComplexInput()
{
    // arrange
    Schema schema = ValidationUtils.CreateSchema();
    DocumentNode query = Parser.Default.Parse(@"
        query queryWithComplexInput($name: String)
        {
            findDog(complex: { name: $name }) {
                name
            }
        }");

    // act
    QueryValidationResult result = Rule.Validate(schema, query);

    // assert
    Assert.False(result.HasErrors);
}

[michaelstaib]

Yeah we are on this one already. #215 will be fixed with version 9.