Don't collect coverage for development-only pages

frontend/jest.config.js

@@ -30,9 +30,9 @@ module.exports = {
   coverageDirectory: "coverage",
 
   // An array of regexp pattern strings used to skip coverage collection
-  // coveragePathIgnorePatterns: [
-  //   "/node_modules/"
-  // ],
+  coveragePathIgnorePatterns: [
+    "pages/mock/"
+  ],
 
   // Indicates which provider should be used to instrument code for coverage
   coverageProvider: "v8",