Fix Error 500 when creating global milestones with Unicode characters

Two issues:

1. The constraints in the resources were incorrect. Here's what it was before:
```
group_milestone  GET /groups/:group_id/milestones/:id(.:format)  groups/milestones#show {:id=>/[a-zA-Z.0-9_\-]+(?<!\.atom)/, :group_id=>/[a-zA-Z.0-9_\-]+(?<!\.atom)/}
```

In this case, id is actually the title of the milestone, which can be anything at the moment.

After:

```
group_milestone  GET /groups/:group_id/milestones/:id(.:format)  groups/milestones#show {:id=>/[^\/]+/, :group_id=>/[a-zA-Z.0-9_\-]+(?<!\.atom)/}
```

2. `parameterize` would strip all Unicode characters, leaving a blank string. Rails would report something like:

ActionView::Template::Error (No route matches {:action=>"show", :controller=>"groups/milestones", :group_id=>#<Group id: 48, name: "ops-dev", path: "ops-dev", owner_id: nil, created_at: "2015-11-15 08:55:30", updated_at: "2015-12-02 06:23:26", type: "Group", description: "", avatar: "sha1.c71e73d51af1865c1bbbf6208e10044d46c9bb93.png", public: false>, :id=>"", :title=>"肯定不是中文的问题"} missing required keys: [:id]):

This change uses the babosa library to create a better slug, which surprisingly
isn't actually used by the global milestone controllers. Instead, they use the
title passed as a query string for some reason.

Closes https://github.com/gitlabhq/gitlabhq/issues/9881

Fix constraints

1 files changed, 27 insertions, 0 deletions

diff --git a/spec/controllers/groups/milestones_controller_spec.rb b/spec/controllers/groups/milestones_controller_spec.rb
new file mode 100644
index 00000000000..eb0c6ac6d80
--- /dev/null
+++ b/spec/controllers/groups/milestones_controller_spec.rb
@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+describe Groups::MilestonesController do
+  let(:group) { create(:group) }
+  let(:project) { create(:project, group: group) }
+  let(:project2) { create(:empty_project, group: group) }
+  let(:user)    { create(:user) }
+  let(:title) { '肯定不是中文的问题' }
+
+  before do
+    sign_in(user)
+    group.add_owner(user)
+    project.team << [user, :master]
+    controller.instance_variable_set(:@group, group)
+  end
+
+  describe "#create" do
+    it "should create group milestone with Chinese title" do
+      post :create,
+           group_id: group.id,
+           milestone: { project_ids: [project.id, project2.id], title: title }
+
+      expect(response).to redirect_to(group_milestone_path(group, title.to_slug.to_s, title: title))
+      expect(Milestone.where(title: title).count).to eq(2)
+    end
+  end
+end