1 files changed, 67 insertions, 0 deletions
diff --git a/spec/services/preview_markdown_service_spec.rb b/spec/services/preview_markdown_service_spec.rb
new file mode 100644
index 00000000000..b2fb5c91313
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+++ b/spec/services/preview_markdown_service_spec.rb
@@ -0,0 +1,67 @@
+require 'spec_helper'
+
+describe PreviewMarkdownService do
+  let(:user) { create(:user) }
+  let(:project) { create(:empty_project) }
+
+  before do
+    project.add_developer(user)
+  end
+
+  describe 'user references' do
+    let(:params) { { text: "Take a look #{user.to_reference}" } }
+    let(:service) { described_class.new(project, user, params) }
+
+    it 'returns users referenced in text' do
+      result = service.execute
+
+      expect(result[:users]).to eq [user.username]
+    end
+  end
+
+  context 'new note with slash commands' do
+    let(:issue) { create(:issue, project: project) }
+    let(:params) do
+      {
+        text: "Please do it\n/assign #{user.to_reference}",
+        slash_commands_target_type: 'Issue',
+        slash_commands_target_id: issue.id
+      }
+    end
+    let(:service) { described_class.new(project, user, params) }
+
+    it 'removes slash commands from text' do
+      result = service.execute
+
+      expect(result[:text]).to eq 'Please do it'
+    end
+
+    it 'explains slash commands effect' do
+      result = service.execute
+
+      expect(result[:commands]).to eq "Assigns #{user.to_reference}."
+    end
+  end
+
+  context 'merge request description' do
+    let(:params) do
+      {
+        text: "My work\n/estimate 2y",
+        slash_commands_target_type: 'MergeRequest'
+      }
+    end
+    let(:service) { described_class.new(project, user, params) }
+
+    it 'removes slash commands from text' do
+      result = service.execute
+
+      expect(result[:text]).to eq 'My work'
+    end
+
+    it 'explains slash commands effect' do
+      result = service.execute
+
+      expect(result[:commands]).to eq 'Sets time estimate to 2y.'
+    end    
+  end
+end