fix OSS test cert discovery

Summary: Enable finding folly test certs in cmake build via folly_test_util FOLLY_CERTS_DIR rather than hardcoding the path so that the certs can be found. The define already existed but was not set/used in the cmake build

Reviewed By: bigfootjon

Differential Revision: D66074308

fbshipit-source-id: 22417237f1341918b3e02f52fe093ab1d38683d9

wangle/CMakeLists.txt

@@ -269,6 +269,7 @@ if(BUILD_TESTS)
   )
   target_link_libraries(
     ${test_name}
+    Folly::folly_test_util
     wangle
     ${LIBGMOCK_LIBRARIES}
     ${LIBEVENT_LIB}

wangle/ssl/test/SSLContextManagerTest.cpp

@@ -44,9 +44,13 @@ std::string get_resource(const char* res) {
 }
 } // namespace
 
-const char* kClientTestChain = "folly/io/async/test/certs/client_chain.pem";
-const char* kClientTestCert = "folly/io/async/test/certs/client_cert.pem";
-const char* kTestCert = "folly/io/async/test/certs/tests-cert.pem";
+#if !defined(FOLLY_CERTS_DIR)
+#define FOLLY_CERTS_DIR "folly/io/async/test/certs"
+#endif
+
+const char* kClientTestChain = FOLLY_CERTS_DIR "/client_chain.pem";
+const char* kClientTestCert = FOLLY_CERTS_DIR "/client_cert.pem";
+const char* kTestCert = FOLLY_CERTS_DIR "/tests-cert.pem";
 #endif
 
 using std::shared_ptr;