API support for adding/removing Policies to/from Policy Profiles

Currently, it is only possible to add/remove MiqPolicy from
MiqPolicySet using the UI.
This change adds to API support for these operations, using the
assign/unassign actions.

Example:
POST /api/policy_profiles/:id/policies

Body:
{
    "action": "assign",
    "resources": [
    	{ "href": "/api/policies/1" },
    	{ "href": "/api/policies/2" }
    ]
}

app/controllers/api/subcollections/policies.rb

@@ -8,11 +8,19 @@ def policies_query_resource(object)
       end
 
       def policies_assign_resource(object, _type, id = nil, data = nil)
-        policy_assign_action(object, :policies, id, data)
+        if object.kind_of?(collection_class(:policy_profiles))
+          object.add_member(policy_specified(id, data, :policies, MiqPolicy))
+        else
+          policy_assign_action(object, :policies, id, data)
+        end
       end
 
       def policies_unassign_resource(object, _type, id = nil, data = nil)
-        policy_unassign_action(object, :policies, id, data)
+        if object.kind_of?(collection_class(:policy_profiles))
+          object.remove_member(policy_specified(id, data, :policies, MiqPolicy))
+        else
+          policy_unassign_action(object, :policies, id, data)
+        end
       end
 
       def policies_resolve_resource(object, _type, id = nil, data = nil)

spec/requests/api/policies_assignment_spec.rb

@@ -139,6 +139,29 @@ def test_unassign_multiple_policy_profiles(object_policies_url, collection, subc
     expect(object.get_policies.first.guid).to eq(ps1.guid)
   end
 
+  context "Policy profile policies assignment" do
+    it "adds Policies to a Policy Profile" do
+      api_basic_authorize
+
+      run_post("#{policy_profiles_url(ps2.id)}/policies", gen_request(:assign, [{"id" => p1.id}, {"id" => p2.id}]))
+
+      expect(response).to have_http_status(:ok)
+      expect(response.parsed_body["results"].count).to eq(2)
+      expect(ps2.reload.miq_policies.count).to eq(3)
+      expect(response.parsed_body["results"].first["guid"]).to eq(p1.guid)
+      expect(response.parsed_body["results"].second["guid"]).to eq(p2.guid)
+    end
+
+    it "removes a Policy from a Policy Profile" do
+      api_basic_authorize
+
+      run_post("#{policy_profiles_url(ps2.id)}/policies", gen_request(:unassign, [{"id" => p3.id}]))
+
+      expect(response).to have_http_status(:ok)
+      expect(ps2.reload.miq_policies.count).to eq(0)
+    end
+  end
+
   context "Provider policies subcollection assignment" do
     let(:provider_url)                  { providers_url(provider.id) }
     let(:provider_policies_url)         { "#{provider_url}/policies" }