Fix serval bugs in ImportColumnFamilyTest (#11372)

Summary:
**Context/Summary:**
ASSERT_EQ will only verify the code of Status, but will not check the state message of Status.

- Assert by checking Status state in `ImportColumnFamilyTest`
- Forgot to set db_comparator_name when creating ExportImportFilesMetaData in `ImportColumnFamilyNegativeTest`

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11372

Reviewed By: ajkr

Differential Revision: D45004343

Pulled By: cbi42

fbshipit-source-id: a13d45521df17ead3d6d4c1c1fe1e4c95397ce8b

db/import_column_family_job.cc

@@ -44,16 +44,19 @@ Status ImportColumnFamilyJob::Prepare(uint64_t next_file_number,
 
   auto num_files = files_to_import_.size();
   if (num_files == 0) {
-    return Status::InvalidArgument("The list of files is empty");
+    status = Status::InvalidArgument("The list of files is empty");
+    return status;
   }
 
   for (const auto& f : files_to_import_) {
     if (f.num_entries == 0) {
-      return Status::InvalidArgument("File contain no entries");
+      status = Status::InvalidArgument("File contain no entries");
+      return status;
     }
 
     if (!f.smallest_internal_key.Valid() || !f.largest_internal_key.Valid()) {
-      return Status::Corruption("File has corrupted keys");
+      status = Status::Corruption("File has corrupted keys");
+      return status;
     }
   }
 

db/import_column_family_test.cc

@@ -628,22 +628,22 @@ TEST_F(ImportColumnFamilyTest, ImportColumnFamilyNegativeTest) {
   {
     // Create column family with existing cf name.
     ExportImportFilesMetaData metadata;
-
-    ASSERT_EQ(db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "koko",
-                                                ImportColumnFamilyOptions(),
-                                                metadata, &import_cfh_),
-              Status::InvalidArgument("Column family already exists"));
+    metadata.db_comparator_name = options.comparator->Name();
+    Status s = db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "koko",
+                                                 ImportColumnFamilyOptions(),
+                                                 metadata, &import_cfh_);
+    ASSERT_TRUE(std::strstr(s.getState(), "Column family already exists"));
     ASSERT_EQ(import_cfh_, nullptr);
   }
 
   {
     // Import with no files specified.
     ExportImportFilesMetaData metadata;
-
-    ASSERT_EQ(db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "yoyo",
-                                                ImportColumnFamilyOptions(),
-                                                metadata, &import_cfh_),
-              Status::InvalidArgument("The list of files is empty"));
+    metadata.db_comparator_name = options.comparator->Name();
+    Status s = db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "yoyo",
+                                                 ImportColumnFamilyOptions(),
+                                                 metadata, &import_cfh_);
+    ASSERT_TRUE(std::strstr(s.getState(), "The list of files is empty"));
     ASSERT_EQ(import_cfh_, nullptr);
   }
 
@@ -693,10 +693,10 @@ TEST_F(ImportColumnFamilyTest, ImportColumnFamilyNegativeTest) {
         LiveFileMetaDataInit(file1_sst_name, sst_files_dir_, 1, 10, 19));
     metadata.db_comparator_name = mismatch_options.comparator->Name();
 
-    ASSERT_EQ(db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "coco",
-                                                ImportColumnFamilyOptions(),
-                                                metadata, &import_cfh_),
-              Status::InvalidArgument("Comparator name mismatch"));
+    Status s = db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "coco",
+                                                 ImportColumnFamilyOptions(),
+                                                 metadata, &import_cfh_);
+    ASSERT_TRUE(std::strstr(s.getState(), "Comparator name mismatch"));
     ASSERT_EQ(import_cfh_, nullptr);
   }
 
@@ -718,10 +718,10 @@ TEST_F(ImportColumnFamilyTest, ImportColumnFamilyNegativeTest) {
         LiveFileMetaDataInit(file3_sst_name, sst_files_dir_, 1, 10, 19));
     metadata.db_comparator_name = options.comparator->Name();
 
-    ASSERT_EQ(db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "yoyo",
-                                                ImportColumnFamilyOptions(),
-                                                metadata, &import_cfh_),
-              Status::IOError("No such file or directory"));
+    Status s = db_->CreateColumnFamilyWithImport(ColumnFamilyOptions(), "yoyo",
+                                                 ImportColumnFamilyOptions(),
+                                                 metadata, &import_cfh_);
+    ASSERT_TRUE(std::strstr(s.getState(), "No such file or directory"));
     ASSERT_EQ(import_cfh_, nullptr);
 
     // Test successful import after a failure with the same CF name. Ensures