[tests] Make it possible to disable tests on the CI

Useful for tests that depend on a good network connection and
you want to run manually.

cmake/test.cmake

@@ -16,6 +16,12 @@ target_include_directories(mbgl-test
     PRIVATE platform/default
 )
 
+if(DEFINED ENV{CI})
+    target_compile_definitions(mbgl-test
+        PRIVATE -DCI_BUILD=1
+    )
+endif()
+
 target_link_libraries(mbgl-test
     PRIVATE mbgl-core
 )

test/src/mbgl/test/util.hpp

@@ -36,6 +36,12 @@
 #define TEST_REQUIRES_SERVER(name) DISABLED_ ## name
 #endif
 
+#if !CI_BUILD
+#define TEST_DISABLED_ON_CI(name) name
+#else
+#define TEST_DISABLED_ON_CI(name) DISABLED_ ## name
+#endif
+
 #include <mbgl/util/image.hpp>
 #include <mbgl/util/chrono.hpp>