Add null check to extractDeepPropertyByMapKey in helpers.ts

karma.conf.js

@@ -1,6 +1,9 @@
 // Karma configuration file, see link for more information
 // https://karma-runner.github.io/1.0/config/configuration-file.html
 
+const process = require('process');
+process.env.CHROME_BIN = require('puppeteer').executablePath();
+
 module.exports = function (config) {
   config.set({
     basePath: '',
@@ -19,13 +22,18 @@ module.exports = function (config) {
       dir: require('path').join(__dirname, 'coverage'), reports: [ 'html', 'lcovonly' ],
       fixWebpackSourcePaths: true
     },
-
+    customLaunchers: {
+      ChromeNoSandbox: {
+        base: 'Chrome',
+        flags: ['--no-sandbox']
+      }
+    },
     reporters: ['progress', 'kjhtml'],
     port: 9876,
     colors: true,
     logLevel: config.LOG_INFO,
     autoWatch: true,
-    browsers: ['Chrome'],
+    browsers: ['ChromeNoSandbox'],
     singleRun: false
   });
 };

package.json

@@ -64,6 +64,7 @@
     "ng-packagr": "^5.3.0",
     "prettier": "^1.16.4",
     "protractor": "^5.4.2",
+    "puppeteer": "^1.20.0",
     "rxjs": "6.4.0",
     "standard-version": "^5.0.0",
     "tsickle": "^0.34.3",

src/pipes/array/filter-by.spec.ts

@@ -54,6 +54,14 @@ describe('FilterByPipe', () => {
       arr: [{ name: 'foo' }, { name: 'bar' }],
       current_employed: false,
     },
+    {
+      id: 5,
+      first_name: 'George',
+      last_name: 'Foreman',
+      work: null,
+      arr: [{ name: 'for' }],
+      current_employed: false,
+    },
     // tslint:enable:max-line-length
   ];