From 36f8307f6438c0039c011b1d1d9ef6381a781cba Mon Sep 17 00:00:00 2001
From: Matthew Miller <matthew@millerti.me>
Date: Tue, 28 Jul 2020 18:18:14 -0700
Subject: Set up custom Jest test environment

---
 packages/browser/jest-environment.js | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 packages/browser/jest-environment.js

(limited to 'packages/browser/jest-environment.js')

diff --git a/packages/browser/jest-environment.js b/packages/browser/jest-environment.js
new file mode 100644
index 0000000..c3a9135
--- /dev/null
+++ b/packages/browser/jest-environment.js
@@ -0,0 +1,22 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const Environment = require('jest-environment-jsdom');
+
+/**
+ * Set up a custom JSDOM-based test environment for Jest so we can add things JSDOM doesn't support
+ */
+class CustomTestEnvironment extends Environment {
+  async setup() {
+    await super.setup();
+    /**
+     * JSDOM doesn't implement TextEncoder so we need to fake it with Node's
+     *
+     * Solved thanks to https://stackoverflow.com/a/57713960/2133271
+     */
+    if (typeof this.global.TextEncoder === 'undefined') {
+      const { TextEncoder } = require('util');
+      this.global.TextEncoder = TextEncoder;
+    }
+  }
+}
+
+module.exports = CustomTestEnvironment;
-- 
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