/// <summary>
/// Tests that <see cref="IListExtensions.AddRange"/> returns the expected results.
/// </summary>
/// <param name="testListA">The primary list.</param>
/// <param name="testListB">The secondary list.</param>
/// <param name="expectedResult">The expected result.</param>
private void TestAddRangeReturnsExpectedResults <T>(IList <T> testListA, IEnumerable <T> testListB, IEnumerable expectedResult)
{
IListExtensions.AddRange(testListA, testListB);
Assert.Equal(expectedResult, testListA);
}
public void AddRangeThrowsExpectedException()
{
Assert.Throws <ArgumentNullException>(() => IListExtensions.AddRange(null !, new int[] { }));
Assert.Throws <ArgumentNullException>(() => IListExtensions.AddRange(new int[] { }, null !));
Assert.Throws <ArgumentNullException>(() => IListExtensions.AddRange <int>(null !, null !));
}