Refactor:

- Support for module features
- Remove kubenix.module and rather use explicit modules
- Make tests framework independent of k8s module
- Remove metacontroller submodule, which will go to kubenix-modules
- Improved submodule propagation and passthru
- Added additional test for k8s-submodule

tests/k8s/submodule.nix

@@ -0,0 +1,56 @@
+{ name, config, lib, kubenix, images, ... }:
+
+with lib;
+
+let
+  cfg = config.submodules.instances.passthru;
+in {
+  imports = with kubenix.modules; [ test submodules k8s docker ];
+
+  test = {
+    name = "k8s-submodule";
+    description = "Simple k8s submodule test";
+    assertions = [{
+      message = "Submodule has correct name set";
+      assertion = (head config.kubernetes.objects).metadata.name == "passthru";
+    } {
+      message = "Should expose docker image";
+      assertion = (head config.docker.export).imageName == "xtruder/nginx";
+    }];
+  };
+
+  kubenix.project = "test-release";
+
+  kubernetes.namespace = "test-namespace";
+
+  submodules.imports = [{
+    module = {name, config, ...}: {
+      imports = with kubenix.modules; [ submodule k8s docker ];
+
+      config = {
+        submodule.name = "test-submodule";
+
+        kubernetes.api.pods.nginx = {
+          metadata.name = name;
+          spec.containers.nginx.image = config.docker.images.nginx.path;
+        };
+
+        docker.images.nginx.image = images.nginx;
+      };
+    };
+  }];
+
+  kubernetes.api.defaults = [{
+    propagate = true;
+    default.metadata.labels.my-label = "my-value";
+  }];
+
+  submodules.instances.passthru = {
+    submodule = "test-submodule";
+  };
+
+  submodules.instances.no-passthru = {
+    submodule = "test-submodule";
+    passthru.enable = false;
+  };
+}