SafeBuffer should maintain safety upon getting a slice via a range if original buffer was safe.

Co-Authored-By: no-itsbackpack <no-itsbackpack@github.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/activesupport/test/safe_buffer_test.rb b/activesupport/test/safe_buffer_test.rb
index 9456bb8753..bf661a5f92 100644
--- a/activesupport/test/safe_buffer_test.rb
+++ b/activesupport/test/safe_buffer_test.rb
@@ -150,6 +150,18 @@ class SafeBufferTest < ActiveSupport::TestCase
     assert_not y.html_safe?, "should not be safe"
   end
 
+  test "Should continue safe on slice" do
+    x = "<div>foo</div>".html_safe
+
+    assert x.html_safe?, "should be safe"
+
+    # getting a slice of it
+    y = x[0..-1]
+
+    # should still be safe
+    assert y.html_safe?, "should be safe"
+  end
+
   test "Should work with interpolation (array argument)" do
     x = "foo %s bar".html_safe % ["qux"]
     assert_equal "foo qux bar", x