public void GetPostingsTest_PhraseNotExist_ReturnsEmpty()
{
PhraseLiteral phrase = new PhraseLiteral("snowing in the town");
IList <Posting> result = phrase.GetPostings(index, processor);
result.Should().BeEmpty("because there's no document that contains the phrase 'snowing in the town'");
}
public void PhraseLiteralTest_EmptyStringException_ReturnsEmpty()
{
PhraseLiteral phrase = new PhraseLiteral("");
IList <Posting> result = phrase.GetPostings(index, processor);
result.Should().BeEmpty("because an empty string is passed to the constructor");
}
public void GetPostingsTest_PhraseExist_ReturnsPostingsWithFirstPosition()
{
IList <Posting> result;
IList <Posting> expected;
//1. Test for exact words
PhraseLiteral phrase1 = new PhraseLiteral("full of mystery");
result = phrase1.GetPostings(index, processor);
expected = index.GetPostings("full");
result.Should().HaveCount(2, "because there are 2 files that contain the phrase 'full of mystery'");
result.Should().BeEquivalentTo(expected, "because 'full of mystery' should have the same postings with 'full'");
//2. Test for stemmed words
PhraseLiteral phrase2 = new PhraseLiteral("hello worlds");
result = phrase2.GetPostings(index, processor);
//position of 'hello' in the doc that has "hello" and "world"
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
expected = new List <Posting> {
new Posting(4, new List <int> {
1
})
};
}
else
{
expected = new List <Posting> {
new Posting(0, new List <int> {
1
})
};
}
result.Should().HaveCount(1, "because 'worlds' should be processed and include result of 'world'");
result.Should().BeEquivalentTo(expected, "because postings for 'hello worlds' should have the position of 'hello'");
}