separate test target into 2 for C and C++

.github/workflows/test.yml

@@ -49,10 +49,10 @@ jobs:
         uses: ./
         with:
           source-dir: test
-          targets: test
+          targets: test_c test_cpp
 
       - name: Run build result
-        run: build/test
+        run: build/test_c && build/test_cpp
 
   use-action-with-specified-compiler:
     runs-on: ubuntu-latest

test/CMakeLists.txt

@@ -12,4 +12,5 @@ if(BUILD_CXX)
   add_executable(hello_world hello_world.cpp)
 endif()
 
-add_executable(test EXCLUDE_FROM_ALL test.cpp)
+add_executable(test_c EXCLUDE_FROM_ALL test.c)
+add_executable(test_cpp EXCLUDE_FROM_ALL test.cpp)

test/test.c

@@ -0,0 +1,3 @@
+int main() {
+  return 0;
+}