diff --git a/packages/tiptap/test/Editor.spec.js b/packages/tiptap/test/Editor.spec.js
index f6528046..e7a58819 100644
--- a/packages/tiptap/test/Editor.spec.js
+++ b/packages/tiptap/test/Editor.spec.js
@@ -1,7 +1,157 @@
 import Editor from '../src/Utils/Editor'
 
+import {
+  Blockquote,
+  CodeBlock,
+  HardBreak,
+  Heading,
+  OrderedList,
+  BulletList,
+  ListItem,
+  TodoItem,
+  TodoList,
+  Bold,
+  Code,
+  Italic,
+  Link,
+  Strike,
+  Underline,
+  History,
+} from '../../tiptap-extensions'
+
 test('can create editor', () => {
   const editor = new Editor()
 
   expect(editor).toBeDefined()
 })
+
+test('set HTML, get HTML', () => {
+  const result = '<p>Lorem <strong>ipsum</strong> dolor sit amet.</p>'
+
+  const editor = new Editor({
+    content: result,
+    extensions: [
+      new Bold(),
+    ],
+  })
+
+  expect(editor.getHTML()).toEqual(result)
+})
+
+test('set HTML, get JSON', () => {
+  const editor = new Editor({
+    content: '<p>Lorem <strong>ipsum</strong> dolor sit amet.</p>',
+    extensions: [
+      new Bold(),
+    ],
+  })
+
+  const result = {
+    type: 'doc',
+    content: [
+      {
+        type: 'paragraph',
+        content: [
+          {
+            type: 'text',
+            text: 'Lorem ',
+          },
+          {
+            type: 'text',
+            marks: [
+              {
+                type: 'bold',
+              },
+            ],
+            text: 'ipsum',
+          },
+          {
+            type: 'text',
+            text: ' dolor sit amet.',
+          },
+        ],
+      },
+    ],
+  }
+
+  expect(editor.getJSON()).toEqual(result)
+})
+
+test('set JSON, get JSON', () => {
+  const result = {
+    type: 'doc',
+    content: [
+      {
+        type: 'paragraph',
+        content: [
+          {
+            type: 'text',
+            text: 'Lorem ',
+          },
+          {
+            type: 'text',
+            marks: [
+              {
+                type: 'bold',
+              },
+            ],
+            text: 'ipsum',
+          },
+          {
+            type: 'text',
+            text: ' dolor sit amet.',
+          },
+        ],
+      },
+    ],
+  }
+
+  const editor = new Editor({
+    content: result,
+    extensions: [
+      new Bold(),
+    ],
+  })
+
+  expect(editor.getJSON()).toEqual(result)
+})
+
+test('set JSON, get HTML', () => {
+  const content = {
+    type: 'doc',
+    content: [
+      {
+        type: 'paragraph',
+        content: [
+          {
+            type: 'text',
+            text: 'Lorem ',
+          },
+          {
+            type: 'text',
+            marks: [
+              {
+                type: 'bold',
+              },
+            ],
+            text: 'ipsum',
+          },
+          {
+            type: 'text',
+            text: ' dolor sit amet.',
+          },
+        ],
+      },
+    ],
+  }
+  const result = '<p>Lorem <strong>ipsum</strong> dolor sit amet.</p>'
+
+  const editor = new Editor({
+    content,
+    extensions: [
+      new Bold(),
+    ],
+  })
+
+  expect(editor.getHTML()).toEqual(result)
+})