fixup tests

modules/testing/docker.nix

@@ -0,0 +1,46 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+with import ../../lib/docker { inherit lib pkgs; };
+let
+  testing = config.testing;
+
+  allImages = unique (flatten (map (t: t.evaled.config.docker.export or [ ]) testing.tests));
+
+  cfg = config.testing.docker;
+
+in
+{
+  options.testing.docker = {
+    registryUrl = mkOption {
+      description = "Docker registry url";
+      type = types.str;
+    };
+
+    images = mkOption {
+      description = "List of images to export";
+      type = types.listOf types.package;
+    };
+
+    copyScript = mkOption {
+      description = "Script to copy images to registry";
+      type = types.package;
+    };
+  };
+
+  config.testing.docker = {
+    images = allImages;
+
+    copyScript = copyDockerImages {
+      images = cfg.images;
+      dest = "docker://" + cfg.registryUrl;
+    };
+  };
+
+  config.testing.defaults = [{
+    features = [ "docker" ];
+    default = {
+      docker.registry.url = cfg.registryUrl;
+    };
+  }];
+}