public void CompareDifferentTest(Expression x, Expression y, Expression z)
{
var comparer = new ExpressionTreeComparer();
var list = new List <Expression>
{
x, y, z
};
list.Sort(comparer);
list.Select(expr => expr.GetHashCode()).Distinct().Should().HaveCount(3);
comparer.Compare(list[0], list[1]).Should().BeLessThan(0);
comparer.Compare(list[0], list[2]).Should().BeLessThan(0);
comparer.Compare(list[1], list[2]).Should().BeLessThan(0);
comparer.Compare(list[1], list[0]).Should().BeGreaterThan(0);
comparer.Compare(list[2], list[0]).Should().BeGreaterThan(0);
comparer.Compare(list[2], list[1]).Should().BeGreaterThan(0);
}
public void CompareSameTest(Expression x, Expression y, Expression z)
{
var comparer = new ExpressionTreeComparer();
var xy = comparer.Compare(x, y);
var xz = comparer.Compare(x, z);
var yz = comparer.Compare(y, z);
var yx = comparer.Compare(y, x);
var zx = comparer.Compare(z, x);
var zy = comparer.Compare(z, y);
var results = new List <int>
{
xy, zx, yz, xz, yx, zy
};
var hashes = new List <int> {
x.GetHashCode(), y.GetHashCode(), z.GetHashCode()
};
hashes.Distinct().Should().HaveCount(1);
results.All(r => r == 0).Should().BeTrue();
}