Alternative approach. Using ruby's test/unit

test/integration/simple-old.rb

@@ -0,0 +1,10 @@
+add_test 'basic', ->(prj) {
+  prj.build_cmake_lists {
+    package 'gh:cpm-cmake/testpack-adder'
+    exe 'using-adder', ['using-adder.cpp']
+    link_libs 'using-adder', 'adder'
+  }
+  cfg = prj.configure
+
+  check cfg.status.success?
+}