From 33f61b832a3d133bf89e396e8deb021f18f0631e Mon Sep 17 00:00:00 2001
From: Samuel Just <sjust@redhat.com>
Date: Mon, 19 Oct 2020 15:14:28 -0700
Subject: [PATCH] test/crimson/seastore/test_btree_lba_manager: add single
 transaction split/merge test

Signed-off-by: Samuel Just <sjust@redhat.com>
---
 .../seastore/test_btree_lba_manager.cc        | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/src/test/crimson/seastore/test_btree_lba_manager.cc b/src/test/crimson/seastore/test_btree_lba_manager.cc
index b02d34427b1..78d47d4da05 100644
--- a/src/test/crimson/seastore/test_btree_lba_manager.cc
+++ b/src/test/crimson/seastore/test_btree_lba_manager.cc
@@ -249,6 +249,15 @@ struct btree_lba_manager_test :
     return addresses;
   }
 
+  std::vector<laddr_t> get_mapped_addresses(test_transaction_t &t) {
+    std::vector<laddr_t> addresses;
+    addresses.reserve(t.mappings.size());
+    for (auto &i: t.mappings) {
+      addresses.push_back(i.first);
+    }
+    return addresses;
+  }
+
   void check_mappings() {
     auto t = create_transaction();
     check_mappings(t);
@@ -354,3 +363,45 @@ TEST_F(btree_lba_manager_test, force_split_merge)
     submit_test_transaction(std::move(t));
   });
 }
+
+TEST_F(btree_lba_manager_test, single_transaction_split_merge)
+{
+  run_async([this] {
+    {
+      auto t = create_transaction();
+      for (unsigned i = 0; i < 600; ++i) {
+	alloc_mapping(t, 0, block_size, get_paddr());
+      }
+      check_mappings(t);
+      submit_test_transaction(std::move(t));
+    }
+    check_mappings();
+
+    {
+      auto addresses = get_mapped_addresses();
+      auto t = create_transaction();
+      for (unsigned i = 0; i != addresses.size(); ++i) {
+	if (i % 4 != 0) {
+	  decref_mapping(t, addresses[i]);
+	}
+      }
+      check_mappings(t);
+      submit_test_transaction(std::move(t));
+    }
+    check_mappings();
+
+    {
+      auto t = create_transaction();
+      for (unsigned i = 0; i < 600; ++i) {
+	alloc_mapping(t, 0, block_size, get_paddr());
+      }
+      auto addresses = get_mapped_addresses(t);
+      for (unsigned i = 0; i != addresses.size(); ++i) {
+	decref_mapping(t, addresses[i]);
+      }
+      check_mappings(t);
+      submit_test_transaction(std::move(t));
+    }
+    check_mappings();
+  });
+}
-- 
2.39.5