skip direct I/O tests in rocksdb lite (#6867)

Summary:
Fix a couple places where direct I/O was used even though it is
unsupported in lite builds.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6867

Test Plan: `LITE=1 make check -j48`

Reviewed By: pdillinger

Differential Revision: D21689185

Pulled By: ajkr

fbshipit-source-id: 3eaa3abf69cd7d0bcaabbcad3bb5a26fb8dd7301

file/random_access_file_reader_test.cc

@@ -74,6 +74,9 @@ class RandomAccessFileReaderTest : public testing::Test {
   }
 };
 
+// Skip the following tests in lite mode since direct I/O is unsupported.
+#ifndef ROCKSDB_LITE
+
 TEST_F(RandomAccessFileReaderTest, ReadDirectIO) {
   std::string fname = "read-direct-io";
   Random rand(0);
@@ -247,6 +250,8 @@ TEST_F(RandomAccessFileReaderTest, MultiReadDirectIO) {
   }
 }
 
+#endif  // ROCKSDB_LITE
+
 }  // namespace ROCKSDB_NAMESPACE
 
 int main(int argc, char** argv) {

table/block_based/block_based_table_reader_test.cc

@@ -221,10 +221,18 @@ TEST_P(BlockBasedTableReaderTest, MultiGet) {
 
 // Param 1: compression type
 // Param 2: whether to use direct reads
+#ifdef ROCKSDB_LITE
+// Skip direct I/O tests in lite mode since direct I/O is unsupported.
+INSTANTIATE_TEST_CASE_P(
+    MultiGet, BlockBasedTableReaderTest,
+    ::testing::Combine(::testing::ValuesIn(GetSupportedCompressions()),
+                       ::testing::Values(false)));
+#else   // ROCKSDB_LITE
 INSTANTIATE_TEST_CASE_P(
     MultiGet, BlockBasedTableReaderTest,
     ::testing::Combine(::testing::ValuesIn(GetSupportedCompressions()),
                        ::testing::Bool()));
+#endif  // ROCKSDB_LITE
 
 }  // namespace ROCKSDB_NAMESPACE
 

table/block_fetcher_test.cc

@@ -339,6 +339,9 @@ class BlockFetcherTest : public testing::Test {
   }
 };
 
+// Skip the following tests in lite mode since direct I/O is unsupported.
+#ifndef ROCKSDB_LITE
+
 // Fetch index block under both direct IO and non-direct IO.
 // Expects:
 // the index block contents are the same for both read modes.
@@ -437,6 +440,8 @@ TEST_F(BlockFetcherTest, FetchAndUncompressCompressedDataBlock) {
                      expected_non_direct_io_stats, expected_direct_io_stats);
 }
 
+#endif  // ROCKSDB_LITE
+
 }  // namespace
 }  // namespace ROCKSDB_NAMESPACE