public void ShouldAddExpressionToValue()
{
var val1 = new Expression(1, new Variable("y"));
var val2 = new Expression(2, Variable.NULL);
var target = new Expression(new Variable("x"));
//x = 2 + y
target.AddToValue(val1, val2);
Assert.AreEqual(2, target.Variable.Value.Count);
Assert.AreEqual(val1, target.Variable.Value.First(x => x.Variable.Name == val1.Variable.Name));
Assert.AreEqual(val2, target.Variable.Value.First(x => x.Variable.Name == val2.Variable.Name));
}
