chore: initial prototype

lib/default.nix

@@ -0,0 +1,31 @@
+{pkgs, ...}: {
+  mkTest = {
+    type ? "unit",
+    name,
+    description ? "",
+    expected ? null,
+    actual ? null,
+    actualDrv ? null,
+    pos ? null,
+  }: {
+    inherit type name description expected actual;
+    actualDrv = actualDrv.drvPath or "";
+    pos =
+      if pos == null
+      then ""
+      else "${pos.file}:${toString pos.line}:${toString pos.column}";
+  };
+  mkSuite = name: tests: {
+    inherit name tests;
+  };
+  exportSuites = suites: let
+    suitesList =
+      if builtins.isList suites
+      then suites
+      else [suites];
+    testsMapped = builtins.toJSON suitesList;
+  in
+    pkgs.runCommand "tests.json" {} ''
+      echo '${testsMapped}' > $out
+    '';
+}