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63 lines
2.3 KiB
Markdown
63 lines
2.3 KiB
Markdown
---
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paths:
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- "**/*.fs"
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- "**/*.fsx"
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- "**/*.fsproj"
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---
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# F# テスト
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> このファイルは [common/testing.md](../common/testing.md) を F# 固有のコンテンツで拡張します。
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## テストフレームワーク
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- F# フレンドリーなアサーションのために **xUnit** と **FsUnit.xUnit** を優先する
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- 明確な失敗メッセージを持つクォーテーションベースのアサーションには **Unquote** を使用する
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- プロパティベーステストには **FsCheck.xUnit** を使用する
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- 依存関係のモックには **NSubstitute** または関数スタブを使用する
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- インテグレーションテストで実際のインフラが必要な場合は **Testcontainers** を使用する
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## テストの構成
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- `tests/` 配下に `src/` の構造を反映させる
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- ユニット、インテグレーション、エンドツーエンドのカバレッジを明確に分離する
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- 実装の詳細ではなく、振る舞いでテストに名前を付ける
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```fsharp
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open Xunit
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open Swensen.Unquote
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[<Fact>]
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let ``リクエストが有効な場合、PlaceOrder は成功を返す`` () =
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let request = { CustomerId = "cust-123"; Items = [ validItem ] }
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let result = OrderService.placeOrder request
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test <@ Result.isOk result @>
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[<Fact>]
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let ``アイテムが空の場合、PlaceOrder はエラーを返す`` () =
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let request = { CustomerId = "cust-123"; Items = [] }
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let result = OrderService.placeOrder request
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test <@ Result.isError result @>
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```
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## FsCheck を使ったプロパティベーステスト
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```fsharp
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open FsCheck.Xunit
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[<Property>]
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let ``注文合計が負になることはない`` (items: OrderItem list) =
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let total = Order.calculateTotal items
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total >= 0m
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```
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## ASP.NET Core インテグレーションテスト
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- API インテグレーションカバレッジには `WebApplicationFactory<TEntryPoint>` を使用する
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- ミドルウェアをバイパスするのではなく、HTTP を通じて認証、バリデーション、シリアライゼーションをテストする
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## カバレッジ
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- 80%以上の行カバレッジを目標とする
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- ドメインロジック、バリデーション、認証、失敗パスのカバレッジに重点を置く
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- 利用可能な場合はカバレッジ収集を有効にして CI で `dotnet test` を実行する
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