private void ReturnsEnumerationOfMethodData(
            [Frozen] Mock<IArgumentNullExceptionFixture> fixtureMock,
            ICollection<MethodData> expectedData,
            MethodInfo unused1,
            CustomAttribute sut)
        {
            // Arrange
            fixtureMock.Setup(f => f.GetData()).Returns(expectedData);

            // Act
            List<MethodData> actualData =
                sut.GetData(unused1)
                   .SelectMany(d => d.OfType<MethodData>())
                   .ToList();

            // Assert
            Assert.Equal(expectedData.Count, actualData.Count);
            Assert.False(expectedData.Except(actualData).Any());
        }