public void AssignIsExpected()
{
Expression actual = TestObject.Assign(TestParameterOne, TestExpressionOne);
Assert.IsInstanceOfType(actual, typeof(BinaryExpression));
BinaryExpression actualExpression = (BinaryExpression)actual;
Assert.AreEqual(TestParameterOne, actualExpression.Left);
Assert.AreEqual(TestExpressionOne, actualExpression.Right);
}