Merge branch 'zj-slash-commands-mattermost' into 'master'

Slash command for mattermost

Closes  #22540

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)


See merge request !7438

2 files changed, 114 insertions, 0 deletions

diff --git a/spec/models/project_services/chat_service_spec.rb b/spec/models/project_services/chat_service_spec.rb
new file mode 100644
index 00000000000..c6a45a3e1be
--- /dev/null
+++ b/spec/models/project_services/chat_service_spec.rb
@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+describe ChatService, models: true do
+  describe "Associations" do
+    it { is_expected.to have_many :chat_names }
+  end
+
+  describe '#valid_token?' do
+    subject { described_class.new }
+
+    it 'is false as it has no token' do
+      expect(subject.valid_token?('wer')).to be_falsey
+    end
+  end
+end
diff --git a/spec/models/project_services/mattermost_slash_commands_service_spec.rb b/spec/models/project_services/mattermost_slash_commands_service_spec.rb
new file mode 100644
index 00000000000..4a1037e950b
--- /dev/null
+++ b/spec/models/project_services/mattermost_slash_commands_service_spec.rb
@@ -0,0 +1,99 @@
+require 'spec_helper'
+
+describe MattermostSlashCommandsService, models: true do
+  describe "Associations" do
+    it { is_expected.to respond_to :token }
+  end
+
+  describe '#valid_token?' do
+    subject { described_class.new }
+
+    context 'when the token is empty' do
+      it 'is false' do
+        expect(subject.valid_token?('wer')).to be_falsey
+      end
+    end
+
+    context 'when there is a token' do
+      before do
+        subject.token = '123'
+      end
+
+      it 'accepts equal tokens' do
+        expect(subject.valid_token?('123')).to be_truthy
+      end
+    end
+  end
+
+  describe '#trigger' do
+    subject { described_class.new }
+
+    context 'no token is passed' do
+      let(:params) { Hash.new }
+
+      it 'returns nil' do
+        expect(subject.trigger(params)).to be_nil
+      end
+    end
+
+    context 'with a token passed' do
+      let(:project) { create(:empty_project) }
+      let(:params) { { token: 'token' } }
+
+      before do
+        allow(subject).to receive(:token).and_return('token')
+      end
+
+      context 'no user can be found' do
+        context 'when no url can be generated' do
+          it 'responds with the authorize url' do
+            response = subject.trigger(params)
+
+            expect(response[:response_type]).to eq :ephemeral
+            expect(response[:text]).to start_with ":sweat_smile: Couldn't identify you"
+          end
+        end
+
+        context 'when an auth url can be generated' do
+          let(:params) do
+            {
+              team_domain: 'http://domain.tld',
+              team_id: 'T3423423',
+              user_id: 'U234234',
+              user_name: 'mepmep',
+              token: 'token'
+            }
+          end
+
+          let(:service) do
+            project.create_mattermost_slash_commands_service(
+              properties: { token: 'token' }
+            )
+          end
+
+          it 'generates the url' do
+            response = service.trigger(params)
+
+            expect(response[:text]).to start_with(':wave: Hi there!')
+          end
+        end
+      end
+
+      context 'when the user is authenticated' do
+        let!(:chat_name) { create(:chat_name, service: service) }
+        let(:service) do
+          project.create_mattermost_slash_commands_service(
+            properties: { token: 'token' }
+          )
+        end
+        let(:params) { { token: 'token', team_id: chat_name.team_id, user_id: chat_name.chat_id } }
+
+        it 'triggers the command' do
+          expect_any_instance_of(Gitlab::ChatCommands::Command).to receive(:execute)
+
+          service.trigger(params)
+        end
+      end
+    end
+  end
+end