Implement merge requests search

It is same search like we have at issues page. It allows to quickly
filter merge requests based on title or desription. I copy-pasted some
js code from Issues.js. In future search (filtering) logic should be
refactoed into one class for merge requests and issues

2 files changed, 11 insertions, 0 deletions

diff --git a/features/project/merge_requests.feature b/features/project/merge_requests.feature
index 7c029f05d75..adad100e56c 100644
--- a/features/project/merge_requests.feature
+++ b/features/project/merge_requests.feature
@@ -218,3 +218,10 @@ Feature: Project Merge Requests
     And I click link "Edit" for the merge request
     And I preview a description text like "Bug fixed :smile:"
     Then I should see the Markdown write tab
+
+  @javascript
+  Scenario: I search merge request
+    Given I click link "All"
+    When I fill in merge request search with "Fe"
+    Then I should see "Feature NS-03" in merge requests
+    And I should not see "Bug NS-04" in merge requests
diff --git a/features/steps/project/merge_requests.rb b/features/steps/project/merge_requests.rb
index 263f2ef2438..b67b2e58caf 100644
--- a/features/steps/project/merge_requests.rb
+++ b/features/steps/project/merge_requests.rb
@@ -276,6 +276,10 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
     end
   end
 
+  step 'I fill in merge request search with "Fe"' do
+    fill_in 'issue_search', with: "Fe"
+  end
+
   def merge_request
     @merge_request ||= MergeRequest.find_by!(title: "Bug NS-05")
   end