From b5400f9a3542aef31a63b8d797e445253d1ff17b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Thu, 30 Mar 2023 13:08:52 +0300
Subject: [PATCH] =?UTF-8?q?mdbx-test:=20=D0=B4=D0=BE=D0=B1=D0=B0=D0=B2?=
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---
 test/CMakeLists.txt           | 10 +++++++
 test/extra/maindb_ordinal.c++ | 55 +++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 test/extra/maindb_ordinal.c++

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3a80eb67..65dddb72 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -71,6 +71,16 @@ if(UNIX AND NOT SUBPROJECT)
   add_executable(test_extra_upsert_alldups extra/upsert_alldups.c)
   target_include_directories(test_extra_upsert_alldups PRIVATE "${PROJECT_SOURCE_DIR}")
   target_link_libraries(test_extra_upsert_alldups ${TOOL_MDBX_LIB})
+
+  if(MDBX_BUILD_CXX)
+    add_executable(test_extra_maindb_ordinal extra/maindb_ordinal.c++)
+    target_include_directories(test_extra_maindb_ordinal PRIVATE "${PROJECT_SOURCE_DIR}")
+    target_link_libraries(test_extra_maindb_ordinal ${TOOL_MDBX_LIB})
+    if(MDBX_CXX_STANDARD)
+      set_target_properties(test_extra_maindb_ordinal PROPERTIES
+        CXX_STANDARD ${MDBX_CXX_STANDARD} CXX_STANDARD_REQUIRED ON)
+    endif()
+  endif()
 endif()
 
 ################################################################################
diff --git a/test/extra/maindb_ordinal.c++ b/test/extra/maindb_ordinal.c++
new file mode 100644
index 00000000..f61d779e
--- /dev/null
+++ b/test/extra/maindb_ordinal.c++
@@ -0,0 +1,55 @@
+#include "mdbx.h++"
+#include <iostream>
+#include <unistd.h>
+
+int main(int argc, const char *argv[]) {
+  (void)argc;
+  (void)argv;
+
+  unlink("." MDBX_DATANAME);
+  unlink("." MDBX_LOCKNAME);
+
+  mdbx::env_managed env(".", mdbx::env_managed::create_parameters(),
+                        mdbx::env::operate_parameters());
+
+  using buffer =
+      mdbx::buffer<mdbx::polymorphic_allocator, mdbx::default_capacity_policy>;
+  auto txn = env.start_write();
+  auto map = txn.create_map(nullptr, mdbx::key_mode::ordinal,
+                            mdbx::value_mode::single);
+#if 0 /* workaround */
+  txn.commit();
+  env.close();
+  env = mdbx::env_managed(".", mdbx::env_managed::create_parameters(),
+                        mdbx::env::operate_parameters());
+  txn = env.start_write();
+#endif
+
+  txn.insert(map, buffer::key_from_u64(UINT64_C(8) << 8 * 0), buffer("a"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(7) << 8 * 1), buffer("b"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(6) << 8 * 2), buffer("c"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(5) << 8 * 3), buffer("d"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(4) << 8 * 4), buffer("e"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(3) << 8 * 5), buffer("f"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(2) << 8 * 6), buffer("g"));
+  txn.insert(map, buffer::key_from_u64(UINT64_C(1) << 8 * 7), buffer("h"));
+  txn.commit();
+
+  txn = env.start_read();
+  auto cursor = txn.open_cursor(map);
+  if (cursor.to_first().value.string_view() == "a" &&
+      cursor.to_next().value.string_view() == "b" &&
+      cursor.to_next().value.string_view() == "c" &&
+      cursor.to_next().value.string_view() == "d" &&
+      cursor.to_next().value.string_view() == "e" &&
+      cursor.to_next().value.string_view() == "f" &&
+      cursor.to_next().value.string_view() == "g" &&
+      cursor.to_next().value.string_view() == "h" &&
+      !cursor.to_next(false).done && cursor.eof()) {
+    std::cout << "OK\n";
+    return 0;
+  }
+
+  std::cerr << "Fail\n";
+  return EXIT_FAILURE;
+}