We are getting JavaScript exceptions when testing an Angular website built with webpack:
com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot modify readonly property: constructor. (//login.company.com:443/discovery/polyfills.js#1)
The first exception we see in the stack trace is Zone.js not being loaded (we load it using polyfill):
Exception class=[net.sourceforge.htmlunit.corejs.javascript.JavaScriptException] com.gargoylesoftware.htmlunit.ScriptException: Error: In this configuration Angular requires Zone.js (//login.company.com:443/js/main.js#1) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:918) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:620) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:532) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:798) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:774) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:108) [...] Caused by: net.sourceforge.htmlunit.corejs.javascript.JavaScriptException: Error: In this configuration Angular requires Zone.js (//login.company.com:443/js/main.js#1) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1119) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:911) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:111) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:422) at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:331) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3570) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:122) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:789) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:903) ... 34 more JavaScriptException value = Error: In this configuration Angular requires Zone.js
Here's the Zone.js stacktrace:
SEVERE: runtimeError: message=[Property 0 not found.] sourceName=[https://login.company.com:443/discovery/polyfills.js] line=[1] lineSource=[null] lineOffset=[0] Jul 12, 2018 1:20:24 PM com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine handleJavaScriptException INFO: Caught script exception ======= EXCEPTION START ======== EcmaError: lineNumber=[1] column=[0] lineSource=[<no source>] name=[TypeError] sourceName=[https://login.company.com:443/discovery/polyfills.js] message=[TypeError: Cannot modify readonly property: constructor. (//login.company.com:443/discovery/polyfills.js#1)] com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot modify readonly property: constructor. (https://login.company.com:443/discovery/polyfills.js#1) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:918) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:620) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:532) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:798) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:774) [...] Enclosed exception: net.sourceforge.htmlunit.corejs.javascript.EcmaError: TypeError: Cannot modify readonly property: constructor. (https://login.company.com:443/discovery/polyfills.js#1) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:4276) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:4254) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError(ScriptRuntime.java:4287) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError1(ScriptRuntime.java:4299) at net.sourceforge.htmlunit.corejs.javascript.ScriptableObject$Slot.setValue(ScriptableObject.java:183) at net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.putImpl(ScriptableObject.java:2865) at net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.put(ScriptableObject.java:531) at com.gargoylesoftware.htmlunit.javascript.HtmlUnitScriptable.put(HtmlUnitScriptable.java:151) at net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.putProperty(ScriptableObject.java:2543) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.setObjectProp(ScriptRuntime.java:1742) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.setObjectProp(ScriptRuntime.java:1736) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1351) at script(https://login.company.com:443/discovery/polyfills.js:1) at script(https://login.company.com:443/discovery/polyfills.js:1) at script.i(https://login.company.com:443/discovery/runtime.js:1) at script(https://login.company.com:443/discovery/polyfills.js:1) at script.i(https://login.company.com:443/discovery/runtime.js:1) at script(https://login.company.com:443/discovery/polyfills.js:1) at script.i(https://login.company.com:443/discovery/runtime.js:1) at script(https://login.company.com:443/discovery/polyfills.js:1) at script.i(https://login.company.com:443/discovery/runtime.js:1) at script.t(https://login.company.com:443/discovery/runtime.js:1) at script.r(https://login.company.com:443/discovery/runtime.js:1) at script(https://login.company.com:443/discovery/polyfills.js:1) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:911) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:111) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:422) at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:331) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3570) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:122) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:789) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:903) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:620) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:532) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:798) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:774) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:108) at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:992) at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:371) at com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:246) at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:267) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:805) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:761) at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1236) at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1136) at net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:226) at net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:345) at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3189) at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2141) at net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:945) at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:521) at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:472) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:1004) at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:253) at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:195) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:267) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:158) at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:529) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:398) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:315) at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:683) at org.openqa.selenium.htmlunit.HtmlUnitDriver.lambda$get$8(HtmlUnitDriver.java:670) at org.openqa.selenium.htmlunit.HtmlUnitDriver.lambda$runAsync$0(HtmlUnitDriver.java:424) at java.lang.Thread.run(Thread.java:748)