fixes test RUNNER, even though the tests still fail

Author: aphelionz

jestEnv.js

@@ -0,0 +1,18 @@
+const Environment = require('jest-environment-jsdom')
+
+/**
+ * A custom environment to set the TextEncoder that is required by TensorFlow.js.
+ */
+module.exports = class CustomTestEnvironment extends Environment {
+  async setup () {
+    await super.setup()
+    if (typeof this.global.TextDecoder === 'undefined') {
+      const { TextDecoder } = require('util')
+      this.global.TextDecoder = TextDecoder
+    }
+    if (typeof this.global.TextEncoder === 'undefined') {
+      const { TextEncoder } = require('util')
+      this.global.TextEncoder = TextEncoder
+    }
+  }
+}

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test",
+    "test": "react-scripts test --env=./jestEnv.js",
     "eject": "react-scripts eject"
   },
   "author": "",