Fix getdeps test failures - add folly::init to interface and navy tests

Summary:
The OSS CMake build uses GTest::gtest_main which does not call folly::init().
Tests that exercise code paths using folly singletons (Timekeeper) or XLOG
crash with SIGABRT or SEGFAULT.

This adds a custom TestMain.cpp that calls InitGoogleTest() followed by
folly::Init, and links it directly to each test executable via target_sources
to avoid link-order issues with transitively-linked GTest::gtest_main.

Fixes 3 of 4 failing interface tests. FlashCacheComponentTest.ExpirationCallback
still fails due to a deeper XLOG initialization issue that needs manual investigation.
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Other changes:

* Remove `WORKING_DIRECTORY "${TOP_DIR}"` from the main CMakeLists.  `TOP_DIR` is never set, so this was create log spam from warnings and was getting unset anyway.
* Use new `CO_ASSERT_OK` in CO_TEST* tests.  This uses `CO_ASSERT_TRUE` (a coro-compatible macro) rather than XCHECK (which just crashes).
* Move FlashCacheComponentTest to gcc-disabled tests (internal compiler error).

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Oncall Short Name: cachelib

Differential Revision: D100265646

fbshipit-source-id: bea090e7ab7f5d6bc76501c07b99dfe156798cb4

Author: rlyerly

cachelib/CMakeLists.txt

@@ -163,7 +163,6 @@ function (generic_add_source_test TEST_PREFIX SOURCE_FILE)
 
   # make tests visible to ctest
   gtest_add_tests(TARGET "${TEST_PREFIX}-${TEST_NAME}"
-                        WORKING_DIRECTORY "${TOP_DIR}"
                         TEST_PREFIX "${TEST_PREFIX}-${TEST_NAME}."
                         TEST_LIST "test_cases")
   # use same timeout as folly

cachelib/common/tests/TestMain.cpp

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <folly/init/Init.h>
+#include <gtest/gtest.h>
+
+int main(int argc, char** argv) {
+  // InitGoogleTest must be called BEFORE folly::Init so that gtest
+  // consumes --gtest_filter and other gtest flags before gflags
+  // (called by folly::Init) rejects them as unknown flags.
+  ::testing::InitGoogleTest(&argc, argv);
+  folly::Init init(&argc, &argv);
+  return RUN_ALL_TESTS();
+}

cachelib/interface/CMakeLists.txt

@@ -50,22 +50,24 @@ if (BUILD_TESTS)
     glog::glog
     gflags
     GTest::gtest
-    GTest::gtest_main
     GTest::gmock
   )
 
   function (add_source_test SOURCE_FILE)
     generic_add_source_test("interface-test" "${SOURCE_FILE}"
                      interface_test_support "${ARGN}")
+    get_filename_component(TEST_NAME "${SOURCE_FILE}" NAME_WE)
+    target_sources("interface-test-${TEST_NAME}" PRIVATE
+      "${CACHELIB_HOME}/common/tests/TestMain.cpp")
   endfunction()
 
   # GCC ICE in gimplify_var_or_parm_decl with coroutine test macros
   if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     add_source_test (tests/InterfaceTest.cpp)
     add_source_test (components/tests/CacheComponentTest.cpp)
+    add_source_test (components/tests/FlashCacheComponentTest.cpp)
   endif()
   add_source_test (tests/ResultTest.cpp)
-  add_source_test (components/tests/FlashCacheComponentTest.cpp)
   add_source_test (utils/tests/CoroFiberAdapterTest.cpp)
   add_source_test (utils/tests/ShardedSerializerTest.cpp)
 endif()