Add new tests

spec/lib/mattermost/client_spec.rb

+require 'spec_helper'
+
+describe Mattermost::Client do
+  let(:user) { build(:user) }
+
+  subject { described_class.new(user) }
+
+  context 'JSON parse error' do
+    before do
+      Struct.new("Request", :body, :success?)
+    end
+
+    it 'yields an error on malformed JSON' do
+      bad_json = Struct::Request.new("I'm not json", true)
+      expect { subject.send(:json_response, bad_json) }.to raise_error(Mattermost::ClientError)
+    end
+
+    it 'shows a client error if the request was unsuccessful' do
+      bad_request = Struct::Request.new("true", false)
+
+      expect { subject.send(:json_response, bad_request) }.to raise_error(Mattermost::ClientError)
+    end
+  end
+end

spec/lib/mattermost/session_spec.rb

@@ -95,5 +95,29 @@ describe Mattermost::Session, type: :request do
         end
       end
     end
+
+    context 'with lease' do
+      before do
+        allow(subject).to receive(:lease_try_obtain).and_return('aldkfjsldfk')
+      end
+
+      it 'tries to obtain a lease' do
+        expect(subject).to receive(:lease_try_obtain)
+        expect(Gitlab::ExclusiveLease).to receive(:cancel)
+
+        # Cannot setup a session, but we should still cancel the lease
+        expect { subject.with_session }.to raise_error(Mattermost::NoSessionError)
+      end
+    end
+
+    context 'without lease' do
+      before do
+        allow(subject).to receive(:lease_try_obtain).and_return(nil)
+      end
+
+      it 'returns a NoSessionError error' do
+        expect { subject.with_session }.to raise_error(Mattermost::NoSessionError)
+      end
+    end
   end
 end