Yasunori Horii halu5071

Testing ViewModel / LiveData with KoTest (previously Kotlintest) and Mockk

I went round a few houses trying to figure out how best to test ViewModels containing LiveData using Kotlin based testing tools. My main mistakes were trying to use JUnit 5 annotations with KoTest test classes and expecting them to work. The @ExtendWith() annotation is from the org.junit.jupiter.api.extension package. Jupiter is the module used for writing tests, whereas KoTest runs on the JUnit 5 Platform. Very different thing apparently

I came accross this Mockk issue which pointed me towards this write up on how to test live data with JUnit 5. This gave me the code to delegate the live data executor to a custom one which simply executes immedietely.

I've not tested thi

Introduction

The computer driven markets for instruments like stocks and exchange traded stock options, have transformed finance and the flow of capital. These markets are enabled by order matching engines (and the infrastructure that supports this software). Before computer trading networks and matching engines, stocks where traded on cavernous exchange floors and transaction costs where high. When electronic trading fully matured, floor traders were a fading anachronism and transaction costs had been reduced to pennies a share in many cases. Electronic trading could not exist without advanced network infrastructure, but without the software matching engines no shares would change hands. The computer trading networks, the matching engine software has also created a concentrated nexus of potential failure. Failures in these systems have increased as the frequency and volume on the electronic networks has increased. The position of order matching engines in the trading infrastructure makes these systems o

Oracle v. GoogleのAPI著作権裁判の話

「OracleとGoogleの判決文を斜め読む」を読んで裁判の経緯は理解できたものの、判決の詳細があまり理解できなかったので判決文を自分で読んだ。法律的な難しさはあまりなく、技術的な論点と関係する条文および過去の判例などが非常にわかりやすく解説されており、判決の根拠もたとえ話を交えて書かれているなど非常に読みやすい印象を受けた。

判決文

全体の内容としては比較的単純で「あらゆるプログラムのコードは著作権で保護される。ただしFair Useによる合法的な利用に関しては差し戻し審で審議せよ」という事のようだ。実は「API」という言葉は一切判決文には出てこないため、内容を良く読む必要がある。

17 U.S.C. 102(b)を巡るGoogleの主張

	var Rx = require('rxjs');
	var firebase = require('firebase');
	firebase.initializeApp({
	"databaseURL": "https://quiver-two.firebaseio.com",
	"serviceAccount": "./service-account.json"
	});

	var ref = firebase.database().ref('rxjs-demo');
	Rx.Observable.fromPromise(ref.remove())
	.map(function () {

	package net.yanzm.profileapplication;

	import android.animation.Animator;
	import android.animation.AnimatorListenerAdapter;
	import android.animation.AnimatorSet;
	import android.animation.ObjectAnimator;
	import android.app.Activity;
	import android.app.FragmentManager;
	import android.content.Intent;
	import android.net.Uri;

	package net.yanzm.profileapplication;

	import android.animation.Animator;
	import android.animation.AnimatorListenerAdapter;
	import android.animation.AnimatorSet;
	import android.animation.ObjectAnimator;
	import android.app.Activity;
	import android.app.AlertDialog;
	import android.content.DialogInterface;
	import android.content.Intent;