1 files changed, 34 insertions, 3 deletions
diff --git a/spec/features/projects/blobs/blob_show_spec.rb b/spec/features/projects/blobs/blob_show_spec.rb
index 82cfbfda157..45fdb36e506 100644
--- a/spec/features/projects/blobs/blob_show_spec.rb
+++ b/spec/features/projects/blobs/blob_show_spec.rb
@@ -3,8 +3,8 @@ require 'spec_helper'
 feature 'File blob', :js, feature: true do
   let(:project) { create(:project, :public) }
 
-  def visit_blob(path, fragment = nil)
-    visit namespace_project_blob_path(project.namespace, project, File.join('master', path), anchor: fragment)
+  def visit_blob(path, anchor: nil, ref: 'master')
+    visit namespace_project_blob_path(project.namespace, project, File.join(ref, path), anchor: anchor)
 
     wait_for_requests
   end
@@ -101,7 +101,7 @@ feature 'File blob', :js, feature: true do
 
     context 'visiting with a line number anchor' do
       before do
-        visit_blob('files/markdown/ruby-style-guide.md', 'L1')
+        visit_blob('files/markdown/ruby-style-guide.md', anchor: 'L1')
       end
 
       it 'displays the blob using the simple viewer' do
@@ -352,6 +352,37 @@ feature 'File blob', :js, feature: true do
     end
   end
 
+  context 'binary file that appears to be text in the first 1024 bytes' do
+    before do
+      visit_blob('encoding/binary-1.bin', ref: 'binary-encoding')
+    end
+
+    it 'displays the blob' do
+      aggregate_failures do
+        # shows a download link
+        expect(page).to have_link('Download (23.8 KB)')
+
+        # does not show a viewer switcher
+        expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+        # The specs below verify an arguably incorrect result, but since we only
+        # learn that the file is not actually text once the text viewer content
+        # is loaded asynchronously, there is no straightforward way to get these
+        # synchronously loaded elements to display correctly.
+        #
+        # Clicking the copy button will result in nothing being copied.
+        # Clicking the raw button will result in the binary file being downloaded,
+        # as expected.
+
+        # shows an enabled copy button, incorrectly
+        expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+
+        # shows a raw button, incorrectly
+        expect(page).to have_link('Open raw')
+      end
+    end
+  end
+
   context '.gitlab-ci.yml' do
     before do
       project.add_master(project.creator)