Rename to core_test_main to entry for consistency (nanocurrency#4572)

* Delete stub `core_test/entry.cpp`

* Rename to `core_test_main` to `entry` for consistency

* Fix includes

nano/core_test/CMakeLists.txt

@@ -1,6 +1,6 @@
 add_executable(
   core_test
-  core_test_main.cc
+  entry.cpp
   fakes/websocket_client.hpp
   fakes/work_peer.hpp
   active_transactions.cpp

nano/core_test/entry.cpp

@@ -1,6 +1,30 @@
+#include <nano/lib/logging.hpp>
+#include <nano/node/common.hpp>
+#include <nano/secure/utility.hpp>
+
 #include <gtest/gtest.h>
 
-TEST (basic, basic)
+#include <boost/filesystem/path.hpp>
+
+constexpr std::size_t OPEN_FILE_DESCRIPTORS_LIMIT = 16384;
+
+namespace nano
+{
+namespace test
+{
+	void cleanup_dev_directories_on_exit ();
+}
+void force_nano_dev_network ();
+}
+
+GTEST_API_ int main (int argc, char ** argv)
 {
-	ASSERT_TRUE (true);
+	nano::logger::initialize_for_tests (nano::log_config::tests_default ());
+	nano::set_file_descriptor_limit (OPEN_FILE_DESCRIPTORS_LIMIT);
+	nano::force_nano_dev_network ();
+	nano::node_singleton_memory_pool_purge_guard memory_pool_cleanup_guard;
+	testing::InitGoogleTest (&argc, argv);
+	auto res = RUN_ALL_TESTS ();
+	nano::test::cleanup_dev_directories_on_exit ();
+	return res;
 }