Windows Subsystem for Linux (WSL)

If you need a real linux shell on your Windows 10 system follow these steps

1. Ensure "Windows-Subsystem for Linux" is active on your machine with the following cmd in a admin power shell

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux

2. Restart your machine if asked

3. Download the linux distribution of your choice via wget 

Invoke-WebRequest -Uri https://aka.ms/wsl-ubuntu-1604 -OutFile Ubuntu.appx –UseBasicParsing

or within you browser  

https://www.microsoft.com/en-us/p/debian/9msvkqc78pk6?activetab=pivot:overviewtab

or even from the MS App Store. 

You'll find a list of distributions here 

• Ubuntu 16.04 LTS
• Ubuntu 18.04 LTS
• OpenSUSE Leap 15
• OpenSUSE Leap 42
• SUSE Linux Enterprise Server 12
• SUSE Linux Enterprise Server 15
• Kali Linux
• Debian GNU/Linux
• Fedora Remix for WSL
• Pengwin
• Pengwin Enterprise
• Alpine WSL

4. Install distribution with

Add-AppxPackage .\Ubuntu.Appx

5. If you now search for Ubuntu in your start menu, you'll find your ready to rock linux console in windows

Appcelerator Titanium projects with IntelliJ

Developing Appcelerator mobile Apps is usually done within the Axway Appcelerator Studio. I'm using IntelliJ to develop most of my apps and here is the way how you could build and run you Appcelerator projects.

Open the project and create a package.json like this:

{
  "name": "my-app",
  "version": "1.0.0",
  "description": "Sample package.json for running titanium apps within IntelliJ.",
  "main": "index.js",
  "directories": {},
  "scripts": {
    "setup": "./node_modules/.bin/titanium sdk install 8.3.1.GA --default",
    "clean": "./node_modules/.bin/titanium clean",
    "build": "npm run build:android && npm run build:ios",
    "build:android": "./node_modules/.bin/titanium build -p android -b",
    "build:android:full": "npm run build:android",
    "build:ios": "./node_modules/.bin/titanium build -p ios -b",
    "build:ios:full": "npm run build:ios",
    "init:android": "npm install && npm run setup | $ANDROID_HOME/tools/bin/sdkmanager --licenses",
    "init:ios": "npm install",
    "android": "./node_modules/.bin/titanium build -p android -T emulator -C HUGO",
    "ios": "./node_modules/.bin/titanium build -p ios -T simulator -C HUGO",
    "download:android:sdk": "$ANDROID_HOME/tools/bin/sdkmanager \"platform-tools\" \"platforms;android-29\" \"build-tools;29.0.2\" \"emulator\" \"ndk-bundle\" \"system-images;android-29;google_apis_playstore;x86\"",
    "create:avd": "echo \"no\"| $ANDROID_HOME/tools/bin/avdmanager create avd -f -n Pixel_2_API_28 -k \"system-images;android-29;google_apis_playstore;x86\" -d \"pixel\"",
    "configure:avd": "for f in ~/.android/avd/*.avd/config.ini; do echo 'hw.keyboard=yes' >> \"$f\"; done",
    "prepare:env:android": "npm install && npm-run-all init:android download:android:sdk create:avd configure:avd"
  },
  "author": "Andre Dvorak",
  "license": "GPL",
  "homepage": "https://www.kambrium.net",
  "devDependencies": {
    "npm-run-all": "4.1.5"
  },
  "dependencies": {
    "alloy": "1.14.1",
    "titanium": "5.2.1"
  }
}

To start a device session with your new app just open the package.json an select

1. "setup" target
2. "android" target 

After the build you will be asked you for the emulator of choice. You could skip this by replacing HUGO with the name of your favourite emulator.

OAuth2 and Open ID connect

OAuth2 is a standard protocol for authorisation. It is a framework which delegates the user authentication to a service, which manages the user accounts. It provides flows for web, desktop and mobile applications.

https://oauth.net/2/

OpenID Connect is an extension of OAuth2. An OAuth2 server which implements OpenID connect is a so called OpenID provider (OP). The client of an OpenID connect server is called Relying Party (RP).
OpenID Connect offers the possibility to retrieve user profile information beside the access token defined within OAuth2. The user information is delivered within the payload of the id_token or within the access_token.
The following steps are the flow of the authorization code flow of an OP

1. The RP open the app and clicks login
2. The app starts an authorize request by opening the website which is defined within the authorization endpoint and specifies a redirect url
3. The user fills in username and password or any information the OP needs to authorise it's user
4. After the user click's continue on the login page the OP will redirect to the url specified in 2. and add an authorization code as a parameter to the redirect url
5. The app fetches the authorization code and calls the token endpoint with the grant_type "authorization_code" to obtain an access token
6. The OP will reply with an access token, refresh token and a lot of other field defined in oauth2 spec
7. The app could now use the access token to authorize the logged in user
8. Within the access token or as a separat id token the app could extract user profile information delivered by the OP

[ERROR] Unable to find suitable Xcode install

Problem
I was unable to build a titanium appcelerator based app on an iMac. My target was ios. So it seems to me that something must be missing within my xcode install.

Solution
Even if they are installed, configure your xcode cmd line tools. Go to

Xcode->Preferences->Locations

and check that the Command Line Tools are visible like in the following screen

JUnit5 or TestNG

Both frameworks are full of testing features. The list of features is quite similar in both frameworks. Here are a few links you might check out the list of relevant features:

https://www.baeldung.com/junit-vs-testng

https://www.stickyminds.com/article/junit-vs-testng-choosing-framework-unit-testing

https://www.guru99.com/junit-vs-testng.html

I choose TestNG because of a feature which JUnit5 is currently missing

Group Test

This feature let me group my i.e. integration test together and let them run in my master build. With TestNG I could also do a before or after group and initialise my test group or cleanup after group run.

With JUnit5 we got something called Tags. Tags are good for grouping tests together. Let's see if they implement more in this direction in future.

spyOn static Methods in jasmine tests

If you want to spy on a static method within your jasmine tests, you could do a simple spy like

beforeAll(async() =>{
  spyOn(UserService, "staticMethod").and.returnValue(true);
});

I'll tend to do this within beforeAll to avoid having problems when doing this in beforeEach. Within beforeEach you might end up in error messages like 

Error: <spyOn> : staticMethod has already been spied upon

    at <Jasmine>

    at UserContext.<anonymous> src/app/shared/components/result-detail/sample.component.spec.ts:74:5)

    at ZoneDelegate.webpackJsonp../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:388:1)

    at ProxyZoneSpec.webpackJsonp../node_modules/zone.js/dist/proxy.js.ProxyZoneSpec.onInvoke node_modules/zone.js/dist/proxy.js:128:1)

    at ZoneDelegate.webpackJsonp../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:387:1)

    at Zone.webpackJsonp../node_modules/zone.js/dist/zone.js.Zone.run node_modules/zone.js/dist/zone.js:138:1)

    at runInTestZone node_modules/zone.js/dist/jasmine-patch.js:145:1)

    at UserContext.<anonymous> node_modules/zone.js/dist/jasmine-patch.js:160:1)

Jasmine runner TypeError 'next' in Angular5 Tests

I stumbled upon an error, which a karma runner gives me in some of our jasmine tests:

TypeError: Cannot read property 'next' of undefined

    at <Jasmine>

    at Function.continuer node_modules/q/q.js:1278:1)

    at UserContext.<anonymous> node_modules/q/q.js:1305:1)

    at ZoneDelegate.webpackJsonp../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:388:1)

    at ProxyZoneSpec.webpackJsonp../node_modules/zone.js/dist/proxy.js.ProxyZoneSpec.onInvoke node_modules/zone.js/dist/proxy.js:128:1)

    at ZoneDelegate.webpackJsonp../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:387:1)

    at Zone.webpackJsonp../node_modules/zone.js/dist/zone.js.Zone.run node_modules/zone.js/dist/zone.js:138:1)

    at runInTestZone node_modules/zone.js/dist/jasmine-patch.js:145:1)

    at UserContext.<anonymous> node_modules/zone.js/dist/jasmine-patch.js:160:1)

    at <Jasmine>

I couldn't find something wrong with the test itself, but I noticed an strange import:

[async] from "q";

This was the reason for the strange error message. Correct import ist

[async] from "@angular/core/testing";