September 2015
Beginner to intermediate
256 pages
5h 26m
Japanese
Content preview from Seleniumデザインパターン & ベストプラクティス
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72
3 章 テストをリファクタリングする
•
環境の準備を他のテストに依存しているテストがあると、
すぐにわかります。おかげで、それぞれのテストの密封性を保たざるを得なくなります。
ここで説明したテスト同士の依存関係とは、「2 章 Spaghetti パターン」で説明した Chain
Linked パターンです。
•
ーテストの不安定さ（
test flakiness
）の原因はテストの
setup
ス
テージにあるとは限りません。アプリケーションの回復力をテストするために、テスト環
境を故意に間違った状態にしてテストをすることがよくあります。その場合、テストが終
わっても環境をそのまま間違った状態にしておくと、後に続くテストが失敗する恐れがあ
ります。
それぞれのテスト実行では、
setup
ステージでテスト環境をセットアップし、
teardown
ス
テージで毎回その環境を元の状態に戻すようにするのが理想です。
•
ー一部のテストフレームワークは最初からテストのランダム実
行をサポートしているだけでなく、ランダム実行順序をデフォルトにしています。
3.5.2
ランダム実行の欠
例によって、テストスイートをランダム実行順序に対応させることには欠点もあります。
•
Spaghetti
パターンと
Big Ball of Mud
パターン
を多用した、巨大で成熟したテストスイートの場合、テストをランダム実行順序に対応さ ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.