basic delta implementation

tests/delta.tests.js

@@ -0,0 +1,11 @@
+import * as t from 'lib0/testing'
+import * as delta from '../src/utils/Delta.js'
+
+/**
+ * @param {t.TestCase} _tc
+ */
+export const testDelta = _tc => {
+  const d = delta.create().insert('hello').insert(' ').useAttributes({ bold: true }).insert('world').useAttribution({ creator: 'tester' }).insert('!').done()
+  t.compare(d.toJSON().ops, [{ insert: 'hello' }, { insert: ' world', attributes: { bold: true } }, { insert: '!', attributes: { bold: true }, attribution: { creator: 'tester' } }])
+}
+