cow_api_test: big replace op
With the modified cache system we might be processing big replace ops at
once. Our old tests didn't catch a case where a big replace op was
chunked into seperate batch writes.
Test: cow_api_test
Change-Id: I3bc80a2f9ed3e4c73dd9f74d9affaba79d49e4d2
diff --git a/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
index 2021348..4456b26 100644
--- a/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
@@ -209,6 +209,48 @@
ASSERT_EQ(sink, data);
}
+TEST_F(CowTestV3, BigReplaceOp) {
+ CowOptions options;
+ options.op_count_max = 10000;
+ options.batch_write = true;
+ options.cluster_ops = 2048;
+
+ auto writer = CreateCowWriter(3, options, GetCowFd());
+ std::string data = "This is some data, believe it";
+ data.resize(options.block_size * 4096, '\0');
+ for (int i = 0; i < data.size(); i++) {
+ data[i] = static_cast<char>('A' + i / options.block_size);
+ }
+ ASSERT_TRUE(writer->AddRawBlocks(5, data.data(), data.size()));
+ ASSERT_TRUE(writer->Finalize());
+
+ CowReader reader;
+ ASSERT_TRUE(reader.Parse(cow_->fd));
+
+ const auto& header = reader.header_v3();
+ ASSERT_EQ(header.op_count, 4096);
+
+ auto iter = reader.GetOpIter();
+ ASSERT_NE(iter, nullptr);
+ ASSERT_FALSE(iter->AtEnd());
+
+ size_t i = 0;
+
+ while (!iter->AtEnd()) {
+ auto op = iter->Get();
+ std::string sink(options.block_size, '\0');
+ ASSERT_EQ(op->type(), kCowReplaceOp);
+ ASSERT_EQ(op->data_length, options.block_size);
+ ASSERT_EQ(op->new_block, 5 + i);
+ ASSERT_TRUE(ReadData(reader, op, sink.data(), options.block_size));
+ ASSERT_EQ(std::string_view(sink),
+ std::string_view(data).substr(i * options.block_size, options.block_size))
+ << " readback data for " << i << "th block does not match";
+ iter->Next();
+ i++;
+ }
+}
+
TEST_F(CowTestV3, ConsecutiveReplaceOp) {
CowOptions options;
options.op_count_max = 20;