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docs: add native Japanese translation of ECC documentation (ja-JP)

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Translate everything-claude-code repository to Japanese including:
- 17 root documentation files
- 60 agent documentation files
- 80 command documentation files
- 99 rule files across 18 language directories (common, angular, arkts, cpp, csharp, dart, fsharp, golang, java, kotlin, perl, php, python, ruby, rust, swift, typescript, web)
- 199 skill documentation files

Total: 455 files translated to Japanese with:
- Consistent terminology glossary applied throughout
- YAML field names preserved in English (name, description, etc.)
- Code blocks and examples untouched (comments translated)
- Markdown structure and relative links preserved
- Professional translation maintaining technical accuracy

This translation expands ECC accessibility to Japanese-speaking developers and teams.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
Claude
2026-05-16 20:12:58 +09:00
committed by Affaan Mustafa
parent b66ae3fbe0
commit ec9ace9c54
376 changed files with 48957 additions and 0 deletions
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---
name: csharp-testing
description: xUnit、FluentAssertions、モッキング、統合テスト、テスト組織のベストプラクティスを使用したC#と.NETのテストパターン。
origin: ECC
---
# C#テストパターン
xUnit、FluentAssertions、最新のテストプラクティスを使用した.NETアプリケーションの包括的なテストパターン。
## 起動条件
- C#コードの新しいテストを書く場合
- テスト品質とカバレッジのレビュー
- .NETプロジェクトのテストインフラストラクチャの設定
- フレーキーまたは遅いテストのデバッグ
## テストフレームワークスタック
| ツール | 目的 |
|---|---|
| **xUnit** | テストフレームワーク（.NETに推奨） |
| **FluentAssertions** | 読みやすいアサーション構文 |
| **NSubstitute**または**Moq** | 依存関係のモッキング |
| **Testcontainers** | 統合テストでの実際のインフラ |
| **WebApplicationFactory** | ASP.NET Core統合テスト |
| **Bogus** | 現実的なテストデータ生成 |
## ユニットテスト構造
### Arrange-Act-Assert
```csharp
public sealed class OrderServiceTests
{
private readonly IOrderRepository _repository = Substitute.For<IOrderRepository>();
private readonly ILogger<OrderService> _logger = Substitute.For<ILogger<OrderService>>();
private readonly OrderService _sut;
public OrderServiceTests()
{
_sut = new OrderService(_repository, _logger);
}
[Fact]
public async Task PlaceOrderAsync_ReturnsSuccess_WhenRequestIsValid()
{
// Arrange
var request = new CreateOrderRequest
{
CustomerId = "cust-123",
Items = [new OrderItem("SKU-001", 2, 29.99m)]
};
// Act
var result = await _sut.PlaceOrderAsync(request, CancellationToken.None);
// Assert
result.IsSuccess.Should().BeTrue();
result.Value.Should().NotBeNull();
result.Value!.CustomerId.Should().Be("cust-123");
}
[Fact]
public async Task PlaceOrderAsync_ReturnsFailure_WhenNoItems()
{
// Arrange
var request = new CreateOrderRequest
{
CustomerId = "cust-123",
Items = []
};
// Act
var result = await _sut.PlaceOrderAsync(request, CancellationToken.None);
// Assert
result.IsSuccess.Should().BeFalse();
result.Error.Should().Contain("at least one item");
}
}
```
### Theoryによるパラメータ化テスト
```csharp
[Theory]
[InlineData("", false)]
[InlineData("a", false)]
[InlineData("ab@c.d", false)]
[InlineData("user@example.com", true)]
[InlineData("user+tag@example.co.uk", true)]
public void IsValidEmail_ReturnsExpected(string email, bool expected)
{
EmailValidator.IsValid(email).Should().Be(expected);
}
[Theory]
[MemberData(nameof(InvalidOrderCases))]
public async Task PlaceOrderAsync_RejectsInvalidOrders(CreateOrderRequest request, string expectedError)
{
var result = await _sut.PlaceOrderAsync(request, CancellationToken.None);
result.IsSuccess.Should().BeFalse();
result.Error.Should().Contain(expectedError);
}
public static TheoryData<CreateOrderRequest, string> InvalidOrderCases => new()
{
{ new() { CustomerId = "", Items = [ValidItem()] }, "CustomerId" },
{ new() { CustomerId = "c1", Items = [] }, "at least one item" },
{ new() { CustomerId = "c1", Items = [new("", 1, 10m)] }, "SKU" },
};
```
## NSubstituteによるモッキング
```csharp
[Fact]
public async Task GetOrderAsync_ReturnsNull_WhenNotFound()
{
// Arrange
var orderId = Guid.NewGuid();
_repository.FindByIdAsync(orderId, Arg.Any<CancellationToken>())
.Returns((Order?)null);
// Act
var result = await _sut.GetOrderAsync(orderId, CancellationToken.None);
// Assert
result.Should().BeNull();
}
[Fact]
public async Task PlaceOrderAsync_PersistsOrder()
{
// Arrange
var request = ValidOrderRequest();
// Act
await _sut.PlaceOrderAsync(request, CancellationToken.None);
// Assert — リポジトリが呼び出されたことを検証
await _repository.Received(1).AddAsync(
Arg.Is<Order>(o => o.CustomerId == request.CustomerId),
Arg.Any<CancellationToken>());
}
```
## ASP.NET Core統合テスト
### WebApplicationFactoryのセットアップ
```csharp
public sealed class OrderApiTests : IClassFixture<WebApplicationFactory<Program>>
{
private readonly HttpClient _client;
public OrderApiTests(WebApplicationFactory<Program> factory)
{
_client = factory.WithWebHostBuilder(builder =>
{
builder.ConfigureServices(services =>
{
// テスト用にインメモリDBで実際のDBを置き換え
services.RemoveAll<DbContextOptions<AppDbContext>>();
services.AddDbContext<AppDbContext>(options =>
options.UseInMemoryDatabase("TestDb"));
});
}).CreateClient();
}
[Fact]
public async Task GetOrder_Returns404_WhenNotFound()
{
var response = await _client.GetAsync($"/api/orders/{Guid.NewGuid()}");
response.StatusCode.Should().Be(HttpStatusCode.NotFound);
}
[Fact]
public async Task CreateOrder_Returns201_WithValidRequest()
{
var request = new CreateOrderRequest
{
CustomerId = "cust-1",
Items = [new("SKU-001", 1, 19.99m)]
};
var response = await _client.PostAsJsonAsync("/api/orders", request);
response.StatusCode.Should().Be(HttpStatusCode.Created);
response.Headers.Location.Should().NotBeNull();
}
}
```
### Testcontainersによるテスト
```csharp
public sealed class PostgresOrderRepositoryTests : IAsyncLifetime
{
private readonly PostgreSqlContainer _postgres = new PostgreSqlBuilder()
.WithImage("postgres:16-alpine")
.Build();
private AppDbContext _db = null!;
public async Task InitializeAsync()
{
await _postgres.StartAsync();
var options = new DbContextOptionsBuilder<AppDbContext>()
.UseNpgsql(_postgres.GetConnectionString())
.Options;
_db = new AppDbContext(options);
await _db.Database.MigrateAsync();
}
public async Task DisposeAsync()
{
await _db.DisposeAsync();
await _postgres.DisposeAsync();
}
[Fact]
public async Task AddAsync_PersistsOrder()
{
var repo = new SqlOrderRepository(_db);
var order = Order.Create("cust-1", [new OrderItem("SKU-001", 2, 10m)]);
await repo.AddAsync(order, CancellationToken.None);
var found = await repo.FindByIdAsync(order.Id, CancellationToken.None);
found.Should().NotBeNull();
found!.Items.Should().HaveCount(1);
}
}
```
## テスト組織
```
tests/
MyApp.UnitTests/
Services/
OrderServiceTests.cs
PaymentServiceTests.cs
Validators/
EmailValidatorTests.cs
MyApp.IntegrationTests/
Api/
OrderApiTests.cs
Repositories/
OrderRepositoryTests.cs
MyApp.TestHelpers/
Builders/
OrderBuilder.cs
Fixtures/
DatabaseFixture.cs
```
## テストデータビルダー
```csharp
public sealed class OrderBuilder
{
private string _customerId = "cust-default";
private readonly List<OrderItem> _items = [new("SKU-001", 1, 10m)];
public OrderBuilder WithCustomer(string customerId)
{
_customerId = customerId;
return this;
}
public OrderBuilder WithItem(string sku, int quantity, decimal price)
{
_items.Add(new OrderItem(sku, quantity, price));
return this;
}
public Order Build() => Order.Create(_customerId, _items);
}
// テストでの使用
var order = new OrderBuilder()
.WithCustomer("cust-vip")
.WithItem("SKU-PREMIUM", 3, 99.99m)
.Build();
```
## よくあるアンチパターン
| アンチパターン | 修正方法 |
|---|---|
| 実装の詳細をテストする | 動作と結果をテストする |
| 共有の可変テスト状態 | テストごとに新しいインスタンス（xUnitはコンストラクタでこれを行う） |
| 非同期テストでの`Thread.Sleep` | タイムアウトまたはポーリングヘルパーを使用した`Task.Delay` |
| `ToString()`出力のアサーション | 型付きプロパティのアサーション |
| テストごとに1つの巨大なアサーション | テストごとに1つの論理的なアサーション |
| 実装を記述するテスト名 | 動作で命名: `Method_ExpectedResult_WhenCondition` |
| `CancellationToken`を無視する | 常に渡してキャンセルを確認する |
## テストの実行
```bash
# すべてのテストを実行
dotnet test
# カバレッジを付けて実行
dotnet test --collect:"XPlat Code Coverage"
# 特定のプロジェクトを実行
dotnet test tests/MyApp.UnitTests/
# テスト名でフィルタリング
dotnet test --filter "FullyQualifiedName~OrderService"
# 開発中のウォッチモード
dotnet watch test --project tests/MyApp.UnitTests/
```