public void Sum_CollectCoefficients_WithConstant()
{
var x = Symbol("x");
var expression = Sum(5 * x, 8 * x, 3);
var simplifier = new CollectCoefficientsInSumSimplifier();
var result = simplifier.Simplify(expression, CancellationToken.None);
Assert.AreEqual("13 * x + 3", result.ToString());
}
public void Sum_CollectCoefficients_Multiple()
{
var x = Symbol("x");
var y = Symbol("y");
var expression = Sum(5 * x, 8 * x, 4 * y, 3 * x * y);
var simplifier = new CollectCoefficientsInSumSimplifier();
var result = simplifier.Simplify(expression, CancellationToken.None);
Assert.AreEqual("13 * x + 4 * y + 3 * x * y", result.ToString());
}