Changes tab VUE refactoring

1 files changed, 57 insertions, 3 deletions

diff --git a/spec/controllers/projects/blob_controller_spec.rb b/spec/controllers/projects/blob_controller_spec.rb
index 9e696e9cb29..4dcb7dc6c87 100644
--- a/spec/controllers/projects/blob_controller_spec.rb
+++ b/spec/controllers/projects/blob_controller_spec.rb
@@ -122,10 +122,64 @@ describe Projects::BlobController do
     end
 
     context 'when essential params are present' do
-      it 'renders the diff content' do
-        do_get(since: 1, to: 5, offset: 10)
+      context 'when rendering for commit' do
+        it 'renders the diff content' do
+          do_get(since: 1, to: 5, offset: 10)
 
-        expect(response.body).to be_present
+          expect(response.body).to be_present
+        end
+      end
+
+      context 'when rendering for merge request' do
+        it 'renders diff context lines Gitlab::Diff::Line array' do
+          do_get(since: 1, to: 5, offset: 10, from_merge_request: true)
+
+          lines = JSON.parse(response.body)
+
+          expect(lines.first).to have_key('type')
+          expect(lines.first).to have_key('rich_text')
+          expect(lines.first).to have_key('rich_text')
+        end
+
+        context 'when rendering match lines' do
+          it 'adds top match line when "since" is less than 1' do
+            do_get(since: 5, to: 10, offset: 10, from_merge_request: true)
+
+            match_line = JSON.parse(response.body).first
+
+            expect(match_line['type']).to eq('match')
+            expect(match_line['meta_data']).to have_key('old_pos')
+            expect(match_line['meta_data']).to have_key('new_pos')
+          end
+
+          it 'does not add top match line when when "since" is equal 1' do
+            do_get(since: 1, to: 10, offset: 10, from_merge_request: true)
+
+            match_line = JSON.parse(response.body).first
+
+            expect(match_line['type']).to eq('context')
+          end
+
+          it 'adds bottom match line when "t"o is less than blob size' do
+            do_get(since: 1, to: 5, offset: 10, from_merge_request: true, bottom: true)
+
+            match_line = JSON.parse(response.body).last
+
+            expect(match_line['type']).to eq('match')
+            expect(match_line['meta_data']).to have_key('old_pos')
+            expect(match_line['meta_data']).to have_key('new_pos')
+          end
+
+          it 'does not add bottom match line when "to" is less than blob size' do
+            commit_id = project.repository.commit('master').id
+            blob = project.repository.blob_at(commit_id, 'CHANGELOG')
+            do_get(since: 1, to: blob.lines.count, offset: 10, from_merge_request: true, bottom: true)
+
+            match_line = JSON.parse(response.body).last
+
+            expect(match_line['type']).to eq('context')
+          end
+        end
       end
     end
   end