Merge branch 'issue_25064' into 'security'

Ensure state param has a valid value when filtering issuables.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/25064

This fix makes sure we only call safe methods on issuable when filtering by state.

See merge request !2038

app/finders/issuable_finder.rb

@@ -7,7 +7,7 @@
 #   current_user - which user use
 #   params:
 #     scope: 'created-by-me' or 'assigned-to-me' or 'all'
-#     state: 'open' or 'closed' or 'all'
+#     state: 'opened' or 'closed' or 'all'
 #     group_id: integer
 #     project_id: integer
 #     milestone_title: string
@@ -183,10 +183,13 @@ class IssuableFinder
   end
 
   def by_state(items)
-    params[:state] ||= 'all'
-
-    if items.respond_to?(params[:state])
-      items.public_send(params[:state])
+    case params[:state].to_s
+    when 'closed'
+      items.closed
+    when 'merged'
+      items.respond_to?(:merged) ? items.merged : items.closed
+    when 'opened'
+      items.opened
     else
       items
     end

changelogs/unreleased/validate-state-param-when-filtering-issuables.yml

+---
+title: Validate state param when filtering issuables
+merge_request:
+author:

spec/finders/issues_finder_spec.rb

@@ -10,6 +10,7 @@ describe IssuesFinder do
   let(:issue1) { create(:issue, author: user, assignee: user, project: project1, milestone: milestone, title: 'gitlab') }
   let(:issue2) { create(:issue, author: user, assignee: user, project: project2, description: 'gitlab') }
   let(:issue3) { create(:issue, author: user2, assignee: user2, project: project2) }
+  let(:closed_issue) { create(:issue, author: user2, assignee: user2, project: project2, state: 'closed') }
   let!(:label_link) { create(:label_link, label: label, target: issue2) }
 
   before do
@@ -25,7 +26,7 @@ describe IssuesFinder do
   describe '#execute' do
     let(:search_user) { user }
     let(:params) { {} }
-    let(:issues) { IssuesFinder.new(search_user, params.merge(scope: scope, state: 'opened')).execute }
+    let(:issues) { IssuesFinder.new(search_user, params.reverse_merge(scope: scope, state: 'opened')).execute }
 
     context 'scope: all' do
       let(:scope) { 'all' }
@@ -143,6 +144,40 @@ describe IssuesFinder do
         end
       end
 
+      context 'filtering by state' do
+        context 'with opened' do
+          let(:params) { { state: 'opened' } }
+
+          it 'returns only opened issues' do
+            expect(issues).to contain_exactly(issue1, issue2, issue3)
+          end
+        end
+
+        context 'with closed' do
+          let(:params) { { state: 'closed' } }
+
+          it 'returns only closed issues' do
+            expect(issues).to contain_exactly(closed_issue)
+          end
+        end
+
+        context 'with all' do
+          let(:params) { { state: 'all' } }
+
+          it 'returns all issues' do
+            expect(issues).to contain_exactly(issue1, issue2, issue3, closed_issue)
+          end
+        end
+
+        context 'with invalid state' do
+          let(:params) { { state: 'invalid_state' } }
+
+          it 'returns all issues' do
+            expect(issues).to contain_exactly(issue1, issue2, issue3, closed_issue)
+          end
+        end
+      end
+
       context 'when the user is unauthorized' do
         let(:search_user) { nil }