Develop Reference

pkg/prelude/bootstrap.js:1876 throw error; ^ Error: EACCES: permission denied, open 'path-to-file'

I created a node.js application locally on my windows machine.
I cloned the application on ubuntu and I packaged my node.js app to node16-linux-arm64 using pkg.
When I try to run the application on ubuntu I receive this error:
pkg/prelude/bootstrap.js:1876
throw error;
^
Error: EACCES: permission denied, open '/home/gs/smart-autonom/smart-autonom-groups-server/gsev-smart-autonom.log'
at Object.openSync (fs.js:443:3)
at Object.openSync (pkg/prelude/bootstrap.js:796:32)
at Object.writeFileSync (fs.js:1194:35)
at Object.appendFileSync (fs.js:1240:6)
at RollingFileStream._renewWriteStream (/snapshot/smart-autonom-groups-server/node_modules/streamroller/lib/RollingFileWriteStream.js:312:8)
at new RollingFileWriteStream (/snapshot/smart-autonom-groups-server/node_modules/streamroller/lib/RollingFileWriteStream.js:94:10)
at new RollingFileStream (/snapshot/smart-autonom-groups-server/node_modules/streamroller/lib/RollingFileStream.js:18:5)
at openTheStream (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/file.js:64:20)
at fileAppender (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/file.js:84:16)
at Object.configure (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/file.js:144:10)
at clustering.onlyOnMaster (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/index.js:117:29)
at Object.onlyOnMaster (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/clustering.js:87:50)
at createAppender (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/index.js:112:21)
at getAppender (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/index.js:68:20)
at Object.keys.forEach (/snapshot/smart-autonom-groups-server/node_modules/log4js/lib/appenders/index.js:147:7)
at Array.forEach (<anonymous>) {
errno: -13,
syscall: 'open',
code: 'EACCES',
path: '/home/gs/smart-autonom/smart-autonom-groups-server/gsev-smart-autonom.log'
}
'gsev-smart-autonom.log' does not even exists.
This is where I specify in code the path for all the logs to be saved:
log4js.configure({
appenders: {
main: {
type: 'file',
// TODO: move filename to config?
filename: 'gsev-smart-autonom.log',
// max 2MB ?
maxLogSize: 512 * 4 * 1024,
// max 10 backups
backups: 10,
// compress as .gz to save space
compress: true,
},
},
categories: {
default: {
appenders: ['main'],
level: 'trace',
},
},
});
I tried different solutions with no result. I spent about 2 days on this error and no success yet.
What might be the solution ? Thank you :)

I keep getting errors when trying to deploy smart contracts to my blockchain using truffle

I have a set of smart contracts that I have compiled and deployed to rinkeby test network. I now need to deploy the to a private goquorum blockchain that runs on the IBFT consensus. The blockchain was built with quorum-wizard. It starts when I run ./start.sh
when I'm in the root of my truffle project I run sudo truffle deploy --reset --network quorum
I get the following error.
> Everything is up to date, there is nothing to compile.
/root/dapp1/Dapp/node_modules/web3-core-helpers/src/errors.js:42
return new Error(message);
^
Error: PollingBlockTracker - encountered an error while attempting to update latest block:
Error: Invalid JSON RPC response: ""
at Object.InvalidResponse (/root/dapp1/Dapp/node_modules/web3-core-helpers/src/errors.js:42:16)
at XMLHttpRequest.request.onreadystatechange (/root/dapp1/Dapp/node_modules/web3-providers-http/src/index.js:92:32)
at XMLHttpRequestEventTarget.dispatchEvent (/root/dapp1/Dapp/node_modules/xhr2-cookies/xml-http-request-event-target.ts:44:13)
at XMLHttpRequest._setReadyState (/root/dapp1/Dapp/node_modules/xhr2-cookies/xml-http-request.ts:219:8)
at XMLHttpRequest._onHttpRequestError (/root/dapp1/Dapp/node_modules/xhr2-cookies/xml-http-request.ts:379:8)
at ClientRequest.<anonymous> (/root/dapp1/Dapp/node_modules/xhr2-cookies/xml-http-request.ts:266:37)
at ClientRequest.emit (events.js:315:20)
at Socket.socketOnEnd (_http_client.js:493:9)
at Socket.emit (events.js:327:22)
at endReadableNT (internal/streams/readable.js:1327:12)
at processTicksAndRejections (internal/process/task_queues.js:80:21)
at PollingBlockTracker._performSync (/root/dapp1/Dapp/node_modules/eth-block-tracker/src/polling.js:51:24)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
This is my truffle-config.js
const HDWalletProvider = require("#truffle/hdwallet-provider");
const mnemonic = "not my real mn emon ic words this is pl cfff was";
module.exports = {
networks: {
rinkeby: {
provider: function() {
return new HDWalletProvider(mnemonic, "https://rinkeby.infura.io/v3/2342342342344345344343434");
},
network_id: '*',
timeoutBlocks: 100000,
networkCheckTimeout:2000000
},
// https://www.trufflesuite.com/docs/truffle/distributed-ledger-support/working-with-quorum
quorum: {
provider: function() {
return new HDWalletProvider(mnemonic, "http://127.0.0.1:21000/");
},
network_id: '*',
type: "quorum",
timeoutBlocks: 1000000,
networkCheckTimeout:20000000
}
},
compilers: {
solc: {
version: "0.5.0",
settings: {
optimizer: {
enabled: true, // Default: false
runs: 1000 // Default: 200
},
evmVersion: "homestead" // Default: "byzantium"
}
}
}
};
I am using
Node v14.16.1
Ubuntu 18.04 (64 Bit)
Quorum 21.1.0
Web3.js v1.3.5
Truffle v5.3.4 (core: 5.3.4)
solidity v0.5.0

Error 1 during test end to end

I am doing a angular exercise where i have to do a e2e test, when I run the protractor protractor.conf.js i have the following errors:
[launcher] Running 1 instances of WebDriver
(node:3032) [DEP0022] DeprecationWarning: os.tmpDir() is deprecated. Use os.tmpdir() instead.
C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\atoms\error.js:108
var template = new Error(this.message);
^
SessionNotCreatedError: session not created exception
from unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"6904.1","isDefault":true},"id":1,"name":"","origin":"://"}
(Session info: chrome=59.0.3071.86)
(Driver info: chromedriver=2.19.346078 (6f1f0cde889532d48ce8242342d0b84f94b114a1),platform=Windows NT 10.0 x86_64)
at new bot.Error (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\atoms\error.js:108:18)
at Object.bot.response.checkResponse (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\atoms\response.js:109:9)
at C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:160:24
at promise.ControlFlow.runInFrame_ (C:/Users/Aurora/AppData/Roaming/npm/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/../webdriver/promise.js:1857:20)
at wrappedCtr.notify (C:/Users/Aurora/AppData/Roaming/npm/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/../webdriver/promise.js:2448:25)
at promise.Promise.notify_ (C:/Users/Aurora/AppData/Roaming/npm/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/../webdriver/promise.js:564:12)
at Array.forEach (native)
at promise.Promise.notifyAll_ (C:/Users/Aurora/AppData/Roaming/npm/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/../webdriver/promise.js:553:15)
at goog.async.run.processWorkQueue (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\goog\async\run.js:130:15)
at <anonymous>
From: Task: WebDriver.createSession()
at Function.webdriver.WebDriver.acquireSession_ (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:157:22)
at Function.webdriver.WebDriver.createSession (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:131:30)
at new Driver (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\chrome.js:810:36)
at DirectDriverProvider.getNewDriver (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\driverProviders\direct.js:68:16)
at Runner.createBrowser (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\runner.js:182:37)
at C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\runner.js:263:21
at _fulfilled (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:797:54)
at self.promiseDispatch.done (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:826:30)
at Promise.promise.promiseDispatch (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:759:13)
at C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:525:49
[launcher] Process exited with error code 1
Can anybody help me to figure out what's wrong?
I attach the file protractor.conf.js and the file that contain all the e2e tests that I execute on the application:
exports.config = {
allScriptsTimeout: 11000,
specs: [
'e2e/*.js'
],
capabilities: {
'browserName': 'chrome'
},
baseUrl: 'http://localhost:3001/',
framework: 'jasmine',
directConnect: true,
jasmineNodeOpts: {
defaultTimeoutInterval: 30000
}
};
'use strict';
describe('conFusion App E2E Testing', function() {
//Introduce the tests into this file
it('should automatically redirect to / when location hash/fragment is empty', function() {
browser.get('index.html');
expect(browser.getLocationAbsUrl()).toMatch("/");
});
//Set up a simple test for the index file to check if the page title is set correctly
describe('index', function() {
beforeEach(function() {
browser.get('index.html#/');
});
it('should have a title', function() {
expect(browser.getTitle()).
toEqual('Ristorante Con Fusion');
});
});
//We will navigate to the first menu item, and test a few properties there
describe('menu 0 item', function() {
beforeEach(function() {
browser.get('index.html#/menu/0');
});
it('should have a name', function() {
var name = element(by.binding('dish.name'));
expect(name.getText()).
toEqual('Uthapizza Hot $4.99');
});
it('should show the number of comments as', function() {
expect(element.all(by.repeater('comment in dish.comments'))
.count()).toEqual(7);
});
it('should show the first comment author as', function() {
element(by.model('critiria')).sendKeys('author');
expect(element.all(by.repeater('comment in dish.comments'))
.count()).toEqual(7);
var author = element.all(by.repeater('comment in dish.comments'))
.first().element(by.binding('comment.author'));
expect(author.getText()).toContain('25 Cent');
});
});
});
For a reason below, I've added Chromedriver Web Version 2.19 again and installed
Chrome version 44, I always get an error:
C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\http\index.js:172 callback(new Error(message)); ^ Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:55368 at ClientRequest.
<anonymous> (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\http\index.js:172:16) at emitOne (events.js:115:13) at ClientRequest.emit (events.js:210:7) at Socket.socketErrorListener (_http_client.js:399:9) at emitOne (events.js:115:13)
at Socket.emit (events.js:210:7) at emitErrorNT (internal/streams/destroy.js:62:8) at _combinedTickCallback (internal/process/next_tick.js:102:11) at process._tickCallback (internal/process/next_tick.js:161:9) From: Task: WebDriver.createSession() at
Function.webdriver.WebDriver.acquireSession_ (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:157:22) at Function.webdriver.WebDriver.createSession (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:131:30)
at new Driver (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\chrome.js:810:36) at DirectDriverProvider.getNewDriver (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\driverProviders\direct.js:68:16)
at Runner.createBrowser (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\runner.js:182:37) at C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\lib\runner.js:263:21 at _fulfilled (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:797:54)
at self.promiseDispatch.done (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:826:30) at Promise.promise.promiseDispatch (C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:759:13) at C:\Users\Aurora\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:525:49
[launcher] Process exited with error code 1

You are using:
Chromedriver version 2.19
Chrome version 59
These two are not compatible - you need ChromeDriver 2.30 to work with Chrome 59:
Latest Release: ChromeDriver 2.30
Supports Chrome v58-60
Update your ChromeDriver. Typically done via:
webdriver-manager update

Protractor - Unable to run protractor tests

My tests are throwing the following error. It used to run fine before. Please advise.
My Config file:
exports.config = {
seleniumAddress: 'http://localhost:4444/wd/hub',
allScriptsTimeout: 20000,
baseUrl: 'https://mylink/#/',
// frameworks to use
frameworks: ['jasmine'],
// Capabilities to be passed to the webdriver instance.
multiCapabilities: [{
'browserName': 'chrome'
//}, {
// 'browserName': 'firefox'
//
}],
// Spec patterns are relative to the current working directory.
specs: [
'tests/HomePage.js'
],
onPrepare: function() {
browser.driver.manage().window().maximize();
require('jasmine-reporters');
jasmine.getEnv().addReporter(
new jasmine.JUnitXmlReporter('xmloutput', true. true));
},
jasmineNodeOpts: {
showColors: true
}
}
My Spec file:
// spec.js
describe('MyTest homepage', function() {
var ptor;
require('protractor-linkuisref-locator')(protractor);
beforeEach(function() {
browser.ignoreSynchronization = true;
ptor = protractor.getInstance();
browser.rootEl = 'div';
//browser.driver.manage().window().setSize(1280, 1024);
browser.debugger();
});
it('Should enter homepage url and credentials', function() {
browser.get('/#/');
element(by.name('userName')).sendKeys('');
element(by.name('password')).sendKeys('');
element(by.xpath("//button[#class=' btn orange small wide']")).click();
});
it('Should the title contain', function() {
expect(browser.getTitle()).toEqual('');
});
it('Should click on the PowerGuide', function() {
element(by.linkUiSref('locator')).click();
ptor.sleep(100);
//expect(ptor.getCurrentUrl(locator)).toEqual('');
});
it('Should click on Month', function() {
element(by.id('month-tab')).click();
ptor.sleep(100);
});
//it('Should load the images', function() {
// element(by.css('.pure-u-1-2')).click();
//var icons = element.all(by.css('.pure-u-1-2')).click();
//icons.first().click();
//});
});
This is the error I am getting.
seleniumProcess.pid: 1380
14:43:45.163 INFO - Launching a standalone server
Setting system property webdriver.chrome.driver to C:\Users\sramamoorthy\AppData\Roaming\npm\node_modules\protractor\sel
enium\chromedriver.exe
14:43:45.342 INFO - Java: Oracle Corporation 25.40-b25
14:43:45.342 INFO - OS: Windows 7 6.1 amd64
14:43:45.373 INFO - v2.45.0, with Core v2.45.0. Built from revision 5017cb8
14:43:45.597 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
14:43:45.597 INFO - Version Jetty/5.1.x
14:43:45.597 INFO - Started HttpContext[/selenium-server,/selenium-server]
14:43:45.779 INFO - Started org.openqa.jetty.jetty.servlet.ServletHandler#23223dd8
14:43:45.781 INFO - Started HttpContext[/wd,/wd]
14:43:45.781 INFO - Started HttpContext[/selenium-server/driver,/selenium-server/driver]
14:43:45.781 INFO - Started HttpContext[/,/]
14:43:45.789 INFO - Started SocketListener on 0.0.0.0:4444
14:43:45.789 INFO - Started org.openqa.jetty.jetty.Server#133314b
14:44:41.384 INFO - Executing: [new session: Capabilities [{count=1, browserName=chrome}]])
14:44:41.399 INFO - Creating a new session for Capabilities [{count=1, browserName=chrome}]
Starting ChromeDriver 2.14.313457 (3d645c400edf2e2c500566c9aa096063e707c9cf) on port 44385
Only local connections are allowed.
14:44:43.309 INFO - Done: [new session: Capabilities [{count=1, browserName=chrome}]]
14:44:43.567 INFO - Executing: [set script timeoutt: 20000])
14:44:43.584 INFO - Executing: [delete session: 64c8dac4-559f-416d-b77b-78c5184b6538])
14:44:43.590 INFO - Done: [set script timeoutt: 20000]
14:44:45.303 INFO - Done: [delete session: 64c8dac4-559f-416d-b77b-78c5184b6538]
Test Error: This is the error I am getting where i am calling the Conf.js file from
Using the selenium server at http://localhost:4444/wd/hub
[launcher] Running 1 instances of WebDriver
[launcher] Error: TypeError: undefined is not a function
at
at Object.exports.run (C:\Users\AppData\Roaming\npm\node_modules\protractor\lib\frameworks\jasmine.js:6
2:17)
at C:\Users\AppData\Roaming\npm\node_modules\protractor\lib\runner.js:326:35
at _fulfilled (C:\Users\sr\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:797:54)
at self.promiseDispatch.done (C:\Users\AppData\Roaming\npm\node_modules\protractor\node_modules\q\q.js:
826:30)
at Promise.promise.promiseDispatch (C:\Users\ppData\Roaming\npm\node_modules\protractor\node_modules\q
\q.js:759:13)
[launcher] Process exited with error code 100

There is a typo inside onPrepare():
onPrepare: function() {
browser.driver.manage().window().maximize();
require('jasmine-reporters');
jasmine.getEnv().addReporter(
new jasmine.JUnitXmlReporter('xmloutput', true. true));
// HERE^
},
You meant instead:
jasmine.getEnv().addReporter(
new jasmine.JUnitXmlReporter('xmloutput', true, true));

Error: TypeError: undefined is not a function
at
at Object.exports.run (C:\Users\AppData\Roaming\npm\node_modules\protractor\lib\frameworks\jasmine.js:6
The error is from the library. I think you might missed some dependencies that the library requires.

Removing this line fixed a similar problem for me:
seleniumAddress: 'http://localhost:4444/wd/hub',

Protractor not testing, WebDriver fails after 1 minute

I'm really new to Protractor and everything NodeJS, and i'm trying to get started using Protractor with AngularJS.
I used the Yeoman generator-gulp-angular to generate a project and all is well, but when i try to protractor protractor.conf.js (i've installed Java and Chromium) the following happens:
vagrant#server:/var/www/html/project/$ protractor protractor.conf.js
Starting selenium standalone server...
[launcher] Running 1 instances of WebDriver
Selenium standalone server started at http://192.168.103.173:38573/wd/hub
It hangs here for 1 minute, and then spurts out the following:
/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/atoms/error.js:113
var template = new Error(this.message);
^
UnknownError: unknown error: Chrome failed to start: exited abnormally
(Driver info: chromedriver=2.14.313457 (3d645c400edf2e2c500566c9aa096063e707c9cf),platform=Linux 3.13.0-24-generic x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 60.69 seconds
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'server', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-24-generic', java.version: '1.7.0_75'
Driver info: org.openqa.selenium.chrome.ChromeDriver
at new bot.Error (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/atoms/error.js:113:18)
at Object.bot.response.checkResponse (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/atoms/response.js:106:9)
at /usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/webdriver.js:152:24
at /usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/base.js:1582:15
at [object Object].webdriver.promise.ControlFlow.runInNewFrame_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:1654:20)
at notify (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:465:12)
at notifyAll (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:442:7)
at resolve (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:420:7)
at fulfill (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:535:5)
at /usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/base.js:1582:15
==== async task ====
WebDriver.createSession()
at Function.webdriver.WebDriver.acquireSession_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/webdriver.js:149:22)
at Function.webdriver.WebDriver.createSession (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/webdriver.js:123:30)
at Builder.build (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/builder.js:294:22)
at DriverProvider.getNewDriver (/usr/local/lib/node_modules/protractor/lib/driverProviders/driverProvider.js:38:7)
at Runner.createBrowser (/usr/local/lib/node_modules/protractor/lib/runner.js:180:37)
at /usr/local/lib/node_modules/protractor/lib/runner.js:257:21
at _fulfilled (/usr/local/lib/node_modules/protractor/node_modules/q/q.js:797:54)
at self.promiseDispatch.done (/usr/local/lib/node_modules/protractor/node_modules/q/q.js:826:30)
at Promise.promise.promiseDispatch (/usr/local/lib/node_modules/protractor/node_modules/q/q.js:759:13)
[launcher] Process exited with error code 1
And exits.
This is my protractory.conf.js:
'use strict';
var paths = require('./.yo-rc.json')['generator-gulp-angular'].props.paths;
exports.config = {
node_modules/protractor/config.json
capabilities: {
'browserName': 'chrome'
},
specs: [paths.e2e + '/**/*.js'],
jasmineNodeOpts: {
showColors: true,
defaultTimeoutInterval: 30000
}
};
I hope someone can help me out!
EDIT
I've added my (single) test code to provide more insight:
'use strict';
describe('The main view', function () {
var page;
beforeEach(function () {
browser.get('http://localhost:3000/index.html');
page = require('./main.po');
});
it('Should display the homepage', function() {
expect(page.header.getText()).toContain("Home");
});
});
And my Page Object file:
'use strict';
var MainPage = function() {
this.header = element(by.tagName('header'));
};
module.exports = new MainPage();