[TEST] Fix linking order and gmock linking (open-telemetry#3106)

* Fix link order

* Fix gmock linking

Author: owent

ext/test/http/CMakeLists.txt

@@ -5,7 +5,7 @@ if(WITH_HTTP_CLIENT_CURL)
   set(FILENAME curl_http_test)
   add_compile_definitions(WITH_CURL)
   add_executable(${FILENAME} ${FILENAME}.cc)
-  target_link_libraries(${FILENAME} ${GTEST_BOTH_LIBRARIES}
+  target_link_libraries(${FILENAME} ${GMOCK_LIB} ${GTEST_BOTH_LIBRARIES}
                         ${CMAKE_THREAD_LIBS_INIT})
 
   if(TARGET CURL::libcurl)
@@ -24,8 +24,8 @@ endif()
 
 set(URL_PARSER_FILENAME url_parser_test)
 add_executable(${URL_PARSER_FILENAME} ${URL_PARSER_FILENAME}.cc)
-target_link_libraries(${URL_PARSER_FILENAME} ${GTEST_BOTH_LIBRARIES}
-                      ${CMAKE_THREAD_LIBS_INIT} opentelemetry_api)
+target_link_libraries(${URL_PARSER_FILENAME} opentelemetry_api ${GMOCK_LIB}
+                      ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 gtest_add_tests(
   TARGET ${URL_PARSER_FILENAME}
   TEST_PREFIX ext.http.urlparser.

test_common/src/http/client/nosend/CMakeLists.txt

@@ -28,7 +28,7 @@ if(${BUILD_TESTING})
   endif()
 
   target_link_libraries(
-    opentelemetry_http_client_nosend ${GTEST_BOTH_LIBRARIES} opentelemetry_ext
-    opentelemetry_test_common)
+    opentelemetry_http_client_nosend opentelemetry_ext
+    opentelemetry_test_common ${GMOCK_LIB} ${GTEST_BOTH_LIBRARIES})
 
 endif()