1 files changed, 27 insertions, 0 deletions
diff --git a/spec/frontend/content_editor/extensions/inline_diff_spec.js b/spec/frontend/content_editor/extensions/inline_diff_spec.js
new file mode 100644
index 00000000000..63cdf665e7f
--- /dev/null
+++ b/spec/frontend/content_editor/extensions/inline_diff_spec.js
@@ -0,0 +1,27 @@
+import { inputRegexAddition, inputRegexDeletion } from '~/content_editor/extensions/inline_diff';
+
+describe('content_editor/extensions/inline_diff', () => {
+  describe.each`
+    inputRegex            | description             | input                         | matches
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'hello{+world+}'}           | ${true}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'hello{+ world +}'}         | ${true}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'hello {+ world+}'}         | ${true}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'{+hello world +}'}         | ${true}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'{+hello with \nnewline+}'} | ${false}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'{+open only'}              | ${false}
+    ${inputRegexAddition} | ${'inputRegexAddition'} | ${'close only+}'}             | ${false}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'hello{-world-}'}           | ${true}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'hello{- world -}'}         | ${true}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'hello {- world-}'}         | ${true}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'{-hello world -}'}         | ${true}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'{+hello with \nnewline+}'} | ${false}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'{-open only'}              | ${false}
+    ${inputRegexDeletion} | ${'inputRegexDeletion'} | ${'close only-}'}             | ${false}
+  `('$description', ({ inputRegex, input, matches }) => {
+    it(`${matches ? 'matches' : 'does not match'}: "${input}"`, () => {
+      const match = new RegExp(inputRegex).test(input);
+
+      expect(match).toBe(matches);
+    });
+  });
+});