static int32_t count(const TermPtr& t, const IndexReaderPtr& r) {
int32_t count = 0;
TermDocsPtr td = r->termDocs(t);
while (td->next()) {
td->doc();
++count;
}
td->close();
return count;
}
void checkSkipTo(int32_t indexDivisor) {
DirectoryPtr dir = newLucene<RAMDirectory>();
IndexWriterPtr writer = newLucene<IndexWriter>(dir, newLucene<WhitespaceAnalyzer>(), true, IndexWriter::MaxFieldLengthLIMITED);
TermPtr ta = newLucene<Term>(L"content", L"aaa");
for (int32_t i = 0; i < 10; ++i) {
addDoc(writer, L"aaa aaa aaa aaa");
}
TermPtr tb = newLucene<Term>(L"content", L"bbb");
for (int32_t i = 0; i < 16; ++i) {
addDoc(writer, L"bbb bbb bbb bbb");
}
TermPtr tc = newLucene<Term>(L"content", L"ccc");
for (int32_t i = 0; i < 50; ++i) {
addDoc(writer, L"ccc ccc ccc ccc");
}
// assure that we deal with a single segment
writer->optimize();
writer->close();
IndexReaderPtr reader = IndexReader::open(dir, IndexDeletionPolicyPtr(), true, indexDivisor);
TermDocsPtr tdocs = reader->termDocs();
// without optimization (assumption skipInterval == 16)
// with next
tdocs->seek(ta);
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(0, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(1, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->skipTo(0));
EXPECT_EQ(2, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(4));
EXPECT_EQ(4, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(9));
EXPECT_EQ(9, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(10));
// without next
tdocs->seek(ta);
EXPECT_TRUE(tdocs->skipTo(0));
EXPECT_EQ(0, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(4));
EXPECT_EQ(4, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(9));
EXPECT_EQ(9, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(10));
// exactly skipInterval documents and therefore with optimization
// with next
tdocs->seek(tb);
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(10, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(11, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->skipTo(5));
EXPECT_EQ(12, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(15));
EXPECT_EQ(15, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(24));
EXPECT_EQ(24, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(25));
EXPECT_EQ(25, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(26));
// without next
tdocs->seek(tb);
EXPECT_TRUE(tdocs->skipTo(5));
EXPECT_EQ(10, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(15));
EXPECT_EQ(15, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(24));
EXPECT_EQ(24, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(25));
EXPECT_EQ(25, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(26));
// much more than skipInterval documents and therefore with optimization
// with next
tdocs->seek(tc);
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(26, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->next());
EXPECT_EQ(27, tdocs->doc());
EXPECT_EQ(4, tdocs->freq());
EXPECT_TRUE(tdocs->skipTo(5));
EXPECT_EQ(28, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(40));
EXPECT_EQ(40, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(57));
EXPECT_EQ(57, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(74));
EXPECT_EQ(74, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(75));
EXPECT_EQ(75, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(76));
// without next
tdocs->seek(tc);
EXPECT_TRUE(tdocs->skipTo(5));
EXPECT_EQ(26, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(40));
EXPECT_EQ(40, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(57));
EXPECT_EQ(57, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(74));
EXPECT_EQ(74, tdocs->doc());
EXPECT_TRUE(tdocs->skipTo(75));
EXPECT_EQ(75, tdocs->doc());
EXPECT_TRUE(!tdocs->skipTo(76));
tdocs->close();
reader->close();
dir->close();
}