public void GetPostingsTest_AndQueryNotExist_ReturnsEmpty()
{
IList <Posting> result;
//1. No overlap between two posting lists. distinct from each other
AndQuery andQuery1 = new AndQuery(new List <IQueryComponent> {
new TermLiteral("snowing"),
new TermLiteral("sun")
});
result = andQuery1.GetPostings(index, processor);
result.Should().BeEmpty("because the postings of 'snowing' and 'sun' don't overlap.");
//2. One component returns empty posting list
AndQuery andQuery2 = new AndQuery(new List <IQueryComponent> {
new TermLiteral("full"),
new TermLiteral("zebra") //no posting for this
});
result = andQuery2.GetPostings(index, processor);
result.Should().BeEmpty("because one component has no posting");
//3. All components returns empty posting list
AndQuery andQuery3 = new AndQuery(new List <IQueryComponent> {
new TermLiteral("running"), //no posting for this
new TermLiteral("zebra") //no posting for this
});
result = andQuery3.GetPostings(index, processor);
result.Should().BeEmpty("because all components has no posting");
}
public void GetPostingsTest_AndQueryWithEmptyComponents_ReturnsEmpty()
{
AndQuery andQuery = new AndQuery(new List <IQueryComponent>());
IList <Posting> result = andQuery.GetPostings(index, processor);
result.Should().BeEmpty("because there's no component in AndQuery");
}
public void GetPostingsTest_AndQueryExist_ReturnsPostings()
{
IList <Posting> result;
//1. Some postings overlap
AndQuery andQuery1 = new AndQuery(new List <IQueryComponent> {
new TermLiteral("snow"), //0,1,2,4
new TermLiteral("mystery") //1,3,4-
});
result = andQuery1.GetPostings(index, processor);
result.Should().HaveCount(2, "because 2 postings contain 'snow' and 'mystery'");
Console.Write(andQuery1.ToString() + "\t");
PrintPostingResult(result);
//2. All postings overlaps
AndQuery andQuery2 = new AndQuery(new List <IQueryComponent> {
new TermLiteral("full"),
new TermLiteral("of")
});
result = andQuery2.GetPostings(index, processor);
result.Should().HaveCount(2, "because all posting from 'full' and 'of' are the same");
Console.Write(andQuery2.ToString() + "\t");
PrintPostingResult(result);
}