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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55
3.2 DRY テストパターン
Devid Thomas と Andrew Hunt は彼らの著書『The Pragmatic Programmer』（邦訳『達人
プログラマー』ピアソンエデュケーション）において、DRY 原則についてはっきり説明していま
す。DRY 原則は 1 つの情報を 1 箇所にのみ格納しようとするので、SSOT（Single Source Of
Truth）や SPOT（Single Point Of Truth）と呼ばれることもあります。
3.2.1
DRY
テストパターンの
DRY
テストパターンを使ってテストを書くことには、たくさんの利点があります。次に
4
つの
利点を挙げます。
•
ーテストとテスト実装は自立しています。テストは任意の順
序で実行できます。また、クリックや新規ユーザの登録といったテストアクションは、テ
スト間で共有できます。
•
フォームに記入するといったアクションはすべて、きちんと
1
つの場
所に置かれます。複数のコピーがテストスイートの至る所にばら撒かれることはありません。
•
1
つのアクションを
1
つの場所に置くことで、アプリケーションの
成長に合わせてテストを更新しやすくなります。
•
ーテストスイートを絶えず管理し、重複を取り除くので、使われな
くなったコードはテストスイートに残りません。
3.2.2
DRY
テストパターンの欠
DRY
テストパターンに従ってテストを書くことには、 ...
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