From 08e5571cf335b00b49eede056bb686e1e829c45c Mon Sep 17 00:00:00 2001
From: Yann Braga <yannbf@gmail.com>
Date: Tue, 8 Feb 2022 15:24:14 +0100
Subject: [PATCH] feat: add testing-library expect matchers

---
 package.json     |  1 +
 src/index.ts     | 11 ++++++++---
 src/typings.d.ts |  1 +
 3 files changed, 10 insertions(+), 3 deletions(-)
 create mode 100644 src/typings.d.ts

diff --git a/package.json b/package.json
index 6797033..82bc503 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
   "dependencies": {
     "@storybook/expect": "storybook-jest",
     "@storybook/instrumenter": "6.4.0-rc.5",
+    "@testing-library/jest-dom": "^5.16.2",
     "jest-mock": "^27.3.0"
   },
   "devDependencies": {
diff --git a/src/index.ts b/src/index.ts
index bc64c99..8264c9a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,10 +1,15 @@
 import { default as expectPatched } from '@storybook/expect';
 import { instrument } from '@storybook/instrumenter';
+import * as matchers from '@testing-library/jest-dom/matchers';
 import * as mock from 'jest-mock';
 
-export const { jest } = instrument({ jest: mock });
+const { jest } = instrument({ jest: mock });
 
-export const expect: typeof expectPatched = instrument(
+const expect: typeof expectPatched = instrument(
   { expect: expectPatched },
-  { intercept: (method, path) => path[0] !== 'expect' }
+  { intercept: (_method, path) => path[0] !== 'expect' }
 ).expect;
+
+expect.extend(matchers);
+
+export { expect, jest };
diff --git a/src/typings.d.ts b/src/typings.d.ts
new file mode 100644
index 0000000..f807926
--- /dev/null
+++ b/src/typings.d.ts
@@ -0,0 +1 @@
+declare module '@testing-library/jest-dom/matchers';