Add wait for expect library for unit testing

client/package.json

@@ -35,7 +35,7 @@
     "arrowParens": "avoid"
   },
   "jest": {
-    "coveragePathIgnorePatterns" : [
+    "coveragePathIgnorePatterns": [
       "src/serviceWorker.js",
       "src/index.js"
     ]
@@ -60,6 +60,7 @@
     "eslint-plugin-prettier": "^3.4.0",
     "jest-enzyme": "^7.1.2",
     "prettier": "^2.2.1",
-    "react-test-renderer": "^16.13.1"
+    "react-test-renderer": "^16.13.1",
+    "wait-for-expect": "^3.0.2"
   }
 }

client/yarn.lock

@@ -11769,6 +11769,11 @@ w3c-xmlserializer@^2.0.0:
   dependencies:
     xml-name-validator "^3.0.0"
 
+wait-for-expect@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/wait-for-expect/-/wait-for-expect-3.0.2.tgz#d2f14b2f7b778c9b82144109c8fa89ceaadaa463"
+  integrity sha512-cfS1+DZxuav1aBYbaO/kE06EOS8yRw7qOFoD3XtjTkYvCvh3zUvNST8DXK/nPaeqIzIv3P3kL3lRJn8iwOiSag==
+
 walker@^1.0.7, walker@~1.0.5:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"