Assert correct response body

activestorage/test/controllers/disk_controller_test.rb

@@ -8,16 +8,18 @@ class ActiveStorage::DiskControllerTest < ActionDispatch::IntegrationTest
     blob = create_blob
 
     get blob.service_url
-    assert_equal "inline; filename=\"hello.txt\"; filename*=UTF-8''hello.txt", @response.headers["Content-Disposition"]
-    assert_equal "text/plain", @response.headers["Content-Type"]
+    assert_equal "inline; filename=\"hello.txt\"; filename*=UTF-8''hello.txt", response.headers["Content-Disposition"]
+    assert_equal "text/plain", response.headers["Content-Type"]
+    assert_equal "Hello world!", response.body
   end
 
   test "showing blob as attachment" do
     blob = create_blob
 
     get blob.service_url(disposition: :attachment)
-    assert_equal "attachment; filename=\"hello.txt\"; filename*=UTF-8''hello.txt", @response.headers["Content-Disposition"]
-    assert_equal "text/plain", @response.headers["Content-Type"]
+    assert_equal "attachment; filename=\"hello.txt\"; filename*=UTF-8''hello.txt", response.headers["Content-Disposition"]
+    assert_equal "text/plain", response.headers["Content-Type"]
+    assert_equal "Hello world!", response.body
   end