[ruby/error_highlight] Support a file that has no final newline

https://github.com/ruby/error_highlight/commit/9d671284cb

1 files changed, 16 insertions, 0 deletions

diff --git a/test/error_highlight/test_error_highlight.rb b/test/error_highlight/test_error_highlight.rb
index 071b3bfd3e..03909bd593 100644
--- a/test/error_highlight/test_error_highlight.rb
+++ b/test/error_highlight/test_error_highlight.rb
@@ -1016,4 +1016,20 @@ _ _ ^^^^^
       load tmp.path
     end
   end
+
+  def test_no_final_newline
+    tmp = Tempfile.new(["error_highlight_test", ".rb"])
+    tmp << "1.time {}"
+    tmp.close(false)
+
+    assert_error_message(NoMethodError, <<~END) do
+undefined method `time' for 1:Integer
+
+1.time {}
+ ^^^^^
+    END
+
+      load tmp.path
+    end
+  end
 end