Be less strict about warnings from "example tests" (#1045)

The build is no longer aborted when one of the "example tests" produces a
message on stderr. However, on Travis this requirement is still made. This
should catch "bad errors" via Travis while not breaking the build for users.

Fixes: https://github.com/awesomeWM/awesome/issues/821
Signed-off-by: Uli Schlachter <psychon@znc.in>

.travis.yml

@@ -126,7 +126,7 @@ install:
       return $result
     }
 script:
-  - export CMAKE_ARGS="-DLUA_LIBRARY=${LUALIBRARY} -DLUA_INCLUDE_DIR=${LUAINCLUDE} -D OVERRIDE_VERSION=$AWESOME_VERSION -D DO_COVERAGE=${DO_COVERAGE}"
+  - export CMAKE_ARGS="-DLUA_LIBRARY=${LUALIBRARY} -DLUA_INCLUDE_DIR=${LUAINCLUDE} -D OVERRIDE_VERSION=$AWESOME_VERSION -D DO_COVERAGE=${DO_COVERAGE} -DSTRICT_TESTS=true"
   - |
     set -ev
     if [ -n "$BUILD_IN_DIR" ]; then

tests/examples/CMakeLists.txt

@@ -159,8 +159,10 @@ function(run_test test_path namespace escaped_content)
     if (NOT TEST_ERROR STREQUAL "")
         message("${TEST_OUTPUT}")
         message("${TEST_ERROR}")
+        if (STRICT_TESTS)
             message(FATAL_ERROR ${test_path} " A test failed, bye")
         endif()
+    endif()
 
     # Read the code and turn it into an usage example.
     escape_code(${test_path} TEST_CODE TEST_PRE_HEADER TEST_POST_HEADER)