public void CanonNegatingFilter()
{
var canon = new FilterCanonicalizer();
var tagFilter1 = new TagFilter(Tag("A"));
var tagFilter2 = new TagFilter(Tag("A"));
var tagFilter3 = new TagFilter(Tag("B"));
var negatingFilter1 = new NegatingFilter(tagFilter1);
var negatingFilter2 = new NegatingFilter(tagFilter2);
var negatingFilter3 = new NegatingFilter(tagFilter3);
var canonNegatingFilter1 = negatingFilter1.Canonicalize(canon);
var canonNegatingFilter2 = negatingFilter2.Canonicalize(canon);
var canonNegatingFilter3 = negatingFilter3.Canonicalize(canon);
Assert.Same(canonNegatingFilter1, canonNegatingFilter2);
Assert.NotSame(canonNegatingFilter1, canonNegatingFilter3);
var canonTagFilter = tagFilter1.Canonicalize(canon);
var canonFilter1 = canonNegatingFilter1 as NegatingFilter;
var canonFilter2 = canonNegatingFilter2 as NegatingFilter;
Assert.NotNull(canonFilter1);
Assert.NotNull(canonFilter2);
Assert.Same(canonFilter1.Inner, canonTagFilter);
Assert.Same(canonFilter2.Inner, canonTagFilter);
}
public void CanonAndSimplifyBinaryFilter()
{
var canon = new FilterCanonicalizer();
var negatingFilter1 = new NegatingFilter(new TagFilter(Tag("B")));
var negatingFilter2 = new NegatingFilter(new TagFilter(Tag("B")));
var binaryFilter = new BinaryFilter(negatingFilter1, FilterOperator.And, negatingFilter2);
var canonFilter = binaryFilter.Canonicalize(canon);
Assert.Same(canonFilter, negatingFilter1.Canonicalize(canon));
}