1 files changed, 23 insertions, 0 deletions
diff --git a/spec/frontend/lib/utils/text_utility_spec.js b/spec/frontend/lib/utils/text_utility_spec.js
index d7cedb939d2..9c50bf577dc 100644
--- a/spec/frontend/lib/utils/text_utility_spec.js
+++ b/spec/frontend/lib/utils/text_utility_spec.js
@@ -340,4 +340,27 @@ describe('text_utility', () => {
       expect(textUtils.isValidSha1Hash(hash)).toBe(valid);
     });
   });
+
+  describe('insertFinalNewline', () => {
+    it.each`
+      input              | output
+      ${'some text'}     | ${'some text\n'}
+      ${'some text\n'}   | ${'some text\n'}
+      ${'some text\n\n'} | ${'some text\n\n'}
+      ${'some\n text'}   | ${'some\n text\n'}
+    `('adds a newline if it doesnt already exist for input: $input', ({ input, output }) => {
+      expect(textUtils.insertFinalNewline(input)).toBe(output);
+    });
+
+    it.each`
+      input                  | output
+      ${'some text'}         | ${'some text\r\n'}
+      ${'some text\r\n'}     | ${'some text\r\n'}
+      ${'some text\n'}       | ${'some text\n\r\n'}
+      ${'some text\r\n\r\n'} | ${'some text\r\n\r\n'}
+      ${'some\r\n text'}     | ${'some\r\n text\r\n'}
+    `('works with CRLF newline style; input: $input', ({ input, output }) => {
+      expect(textUtils.insertFinalNewline(input, '\r\n')).toBe(output);
+    });
+  });
 });