clanLib.jsonschema: move tests from pkgs/clan-cli

lib/jsonschema/flake-module.nix

@@ -0,0 +1,29 @@
+{
+  perSystem = { pkgs, self', ... }: {
+    checks = {
+
+      # check if the `clan config` example jsonschema and data is valid
+      lib-jsonschema-example-valid = pkgs.runCommand "lib-jsonschema-example-valid" { } ''
+        echo "Checking that example-schema.json is valid"
+        ${pkgs.check-jsonschema}/bin/check-jsonschema \
+          --check-metaschema ${./.}/example-schema.json
+
+        echo "Checking that example-data.json is valid according to example-schema.json"
+        ${pkgs.check-jsonschema}/bin/check-jsonschema \
+          --schemafile ${./.}/example-schema.json \
+          ${./.}/example-data.json
+
+        touch $out
+      '';
+
+      # check if the `clan config` nix jsonschema converter unit tests succeed
+      lib-jsonschema-nix-unit-tests = pkgs.runCommand "lib-jsonschema-nix-unit-tests" { } ''
+        export NIX_PATH=nixpkgs=${pkgs.path}
+        ${self'.packages.nix-unit}/bin/nix-unit \
+          ${./.}/test.nix \
+          --eval-store $(realpath .)
+        touch $out
+      '';
+    };
+  };
+}