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Add additional checks for three existing unit tests (#8973)

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Summary:
With test sync points, we can assert on the equality of iterator value in three existing
unit tests.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8973

Test Plan:
```
gtest-parallel -r 1000 ./db_test2 --gtest_filter=DBTest2.IterRaceFlush2:DBTest2.IterRaceFlush1:DBTest2.IterRefreshRaceFlush
```

make check

Reviewed By: akankshamahajan15

Differential Revision: D31256340

Pulled By: riversand963

fbshipit-source-id: a9440767ab383e0ec61bd43ffa8fbec4ba562ea2
This commit is contained in:
Yanqin Jin 2021-10-01 17:21:39 -07:00 committed by Facebook GitHub Bot
parent 84d71f30c4
commit 2cdaf5ca5b
1 changed files with 9 additions and 6 deletions
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15
db/db_test2.cc
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@ -3670,14 +3670,15 @@ TEST_F(DBTest2, IterRaceFlush1) {
TEST_SYNC_POINT("DBTest2::IterRaceFlush:2");
});
// iterator is created after the first Put(), so it should see either
// "v1" or "v2".
// iterator is created after the first Put(), and its snapshot sequence is
// assigned after second Put(), so it must see v2.
{
std::unique_ptr<Iterator> it(db_->NewIterator(ReadOptions()));
it->Seek("foo");
ASSERT_TRUE(it->Valid());
ASSERT_OK(it->status());
ASSERT_EQ("foo", it->key().ToString());
ASSERT_EQ("v2", it->value().ToString());
}
t1.join();
@ -3700,14 +3701,15 @@ TEST_F(DBTest2, IterRaceFlush2) {
TEST_SYNC_POINT("DBTest2::IterRaceFlush2:2");
});
// iterator is created after the first Put(), so it should see either
// "v1" or "v2".
// iterator is created after the first Put(), and its snapshot sequence is
// assigned before second Put(), thus it must see v1.
{
std::unique_ptr<Iterator> it(db_->NewIterator(ReadOptions()));
it->Seek("foo");
ASSERT_TRUE(it->Valid());
ASSERT_OK(it->status());
ASSERT_EQ("foo", it->key().ToString());
ASSERT_EQ("v1", it->value().ToString());
}
t1.join();
@ -3730,8 +3732,8 @@ TEST_F(DBTest2, IterRefreshRaceFlush) {
TEST_SYNC_POINT("DBTest2::IterRefreshRaceFlush:2");
});
// iterator is created after the first Put(), so it should see either
// "v1" or "v2".
// iterator is refreshed after the first Put(), and its sequence number is
// assigned after second Put(), thus it must see v2.
{
std::unique_ptr<Iterator> it(db_->NewIterator(ReadOptions()));
ASSERT_OK(it->status());
@ -3740,6 +3742,7 @@ TEST_F(DBTest2, IterRefreshRaceFlush) {
ASSERT_TRUE(it->Valid());
ASSERT_OK(it->status());
ASSERT_EQ("foo", it->key().ToString());
ASSERT_EQ("v2", it->value().ToString());
}
t1.join();