CI: add several tests for exit code checking

Author: perazz

ci/run_tests.sh

@@ -158,5 +158,42 @@ pushd cpp_files
 "$fpm" test
 popd
 
+# Test app exit codes
+pushd fpm_test_exit_code
+"$fpm" build
+
+# odd number -> return 0
+EXIT_CODE=0
+"$fpm" run -- 1 || EXIT_CODE=$?
+test $EXIT_CODE -eq 0
+
+# even number -> return 3
+EXIT_CODE=0
+"$fpm" run -- 512 || EXIT_CODE=$?
+test $EXIT_CODE -eq 3
+
+# even number -> return 3
+EXIT_CODE=0
+"$fpm" run -- 0 || EXIT_CODE=$?
+test $EXIT_CODE -eq 3
+
+# not an integer -> return 3
+EXIT_CODE=0
+"$fpm" run -- 3.1415 || EXIT_CODE=$?
+test $EXIT_CODE -eq 2
+
+# not a number
+EXIT_CODE=0
+"$fpm" run -- notanumber || EXIT_CODE=$?
+test $EXIT_CODE -eq 2
+
+# no arguments
+EXIT_CODE=0
+"$fpm" run || EXIT_CODE=$?
+test $EXIT_CODE -eq 1
+
+popd
+
+
 # Cleanup
 rm -rf ./*/build