TEST_F(DocumentSourceMatchTest, MultipleMatchStagesShouldCombineIntoOne) {
auto match1 = DocumentSourceMatch::create(BSON("a" << 1), getExpCtx());
auto match2 = DocumentSourceMatch::create(BSON("b" << 1), getExpCtx());
auto match3 = DocumentSourceMatch::create(BSON("c" << 1), getExpCtx());
Pipeline::SourceContainer container;
// Check initial state
ASSERT_BSONOBJ_EQ(match1->getQuery(), BSON("a" << 1));
ASSERT_BSONOBJ_EQ(match2->getQuery(), BSON("b" << 1));
ASSERT_BSONOBJ_EQ(match3->getQuery(), BSON("c" << 1));
container.push_back(match1);
container.push_back(match2);
match1->optimizeAt(container.begin(), &container);
ASSERT_EQUALS(container.size(), 1U);
ASSERT_BSONOBJ_EQ(match1->getQuery(), fromjson("{'$and': [{a:1}, {b:1}]}"));
container.push_back(match3);
match1->optimizeAt(container.begin(), &container);
ASSERT_EQUALS(container.size(), 1U);
ASSERT_BSONOBJ_EQ(match1->getQuery(),
fromjson("{'$and': [{'$and': [{a:1}, {b:1}]},"
"{c:1}]}"));
}
void run() {
client.insert(nss.ns(), BSON("a" << 1));
client.insert(nss.ns(), BSON("a" << 2));
client.insert(nss.ns(), BSON("a" << 3));
createSource();
Pipeline::SourceContainer container;
container.push_back(source());
container.push_back(mkLimit(10));
source()->optimizeAt(container.begin(), &container);
// initial limit becomes limit of cursor
ASSERT_EQUALS(container.size(), 1U);
ASSERT_EQUALS(source()->getLimit(), 10);
container.push_back(mkLimit(2));
source()->optimizeAt(container.begin(), &container);
// smaller limit lowers cursor limit
ASSERT_EQUALS(container.size(), 1U);
ASSERT_EQUALS(source()->getLimit(), 2);
container.push_back(mkLimit(3));
source()->optimizeAt(container.begin(), &container);
// higher limit doesn't effect cursor limit
ASSERT_EQUALS(container.size(), 1U);
ASSERT_EQUALS(source()->getLimit(), 2);
// The cursor allows exactly 2 documents through
ASSERT(source()->getNext().isAdvanced());
ASSERT(source()->getNext().isAdvanced());
ASSERT(source()->getNext().isEOF());
}