CI でモックやスタブの実装をせず API レスポンスを差し替える

# JSON ファイルからモックルールを読み込んでプロキシを起動
mimicry serve --rules ./mock-rules.json --port 8080

# iOS シミュレーターのプロキシ設定も自動構成（ローカル開発向け）
mimicry serve --rules ./mock-rules.json --port 8080 --configure-simulator

#!/bin/bash
set -euo pipefail

if [[ "${CI_XCODEBUILD_ACTION:-}" != "test-without-building" ]]; then
    exit 0
fi

MIMICRY_VERSION="5.6.4"
MIMICRY_DIR="${CI_PRIMARY_REPOSITORY_PATH:-/Volumes/workspace/repository}/.mimicry"
MIMICRY_BIN="$MIMICRY_DIR/Mimicry.app/Contents/MacOS/Mimicry"

if [ ! -f "$MIMICRY_BIN" ]; then
    mkdir -p "$MIMICRY_DIR"
    curl -sL -o "$MIMICRY_DIR/Mimicry.dmg" \
      "https://github.com/kusumotoa/mimicry-releases/releases/download/v${MIMICRY_VERSION}/Mimicry_${MIMICRY_VERSION}_universal.dmg"
    hdiutil attach "$MIMICRY_DIR/Mimicry.dmg" -nobrowse -quiet
    cp -R /Volumes/Mimicry/Mimicry.app "$MIMICRY_DIR/Mimicry.app"
    hdiutil detach /Volumes/Mimicry -quiet
fi

# テストフェーズではリポジトリのファイルが存在しないためスクリプト内で生成
cat > "$MIMICRY_DIR/mock-rules.json" <<'RULES'
{
  "rules": [
    {
      "id": "test-hello",
      "urlPattern": "/hello",
      "method": "GET",
      "statusCode": 200,
      "responseBody": "{\"message\":\"Hello from Mimicry!\"}",
      "headers": { "Content-Type": "application/json" },
      "enabled": true,
      "domains": ["kusumoto-test-no-domain"]
    }
  ],
  "allowedDomains": ["kusumoto-test-no-domain"],
  "noCaching": true
}
RULES

nohup "$MIMICRY_BIN" serve \
  --rules "$MIMICRY_DIR/mock-rules.json" \
  --port 8080 > "$MIMICRY_DIR/mimicry.log" 2>&1 &

sleep 3

struct APIClient {
    static func makeSession() -> URLSession {
        let config = URLSessionConfiguration.default
        #if DEBUG
        config.connectionProxyDictionary = [
            "HTTPSEnable": true,
            "HTTPSProxy": "localhost",
            "HTTPSPort": 8080,
        ]
        return URLSession(configuration: config, delegate: ProxyTrustDelegate(), delegateQueue: nil)
        #else
        return URLSession(configuration: config)
        #endif
    }
}

#if DEBUG
private final class ProxyTrustDelegate: NSObject, URLSessionDelegate {
    func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge) async
        -> (URLSession.AuthChallengeDisposition, URLCredential?) {
        (.useCredential, URLCredential(trust: challenge.protectionSpace.serverTrust!))
    }
}
#endif

import Testing
import Foundation

struct MimicryProxyTests {

    @Test("Mimicry プロキシ経由でモックレスポンスが返る")
    func mockResponseThroughProxy() async throws {
        let session = APIClient.makeSession()
        let url = URL(string: "https://kusumoto-test-no-domain/hello")!

        let (data, response) = try await session.data(for: URLRequest(url: url))
        let httpResponse = try #require(response as? HTTPURLResponse)

        #expect(httpResponse.statusCode == 200)

        struct HelloResponse: Decodable {
            let message: String
        }

        let body = try JSONDecoder().decode(HelloResponse.self, from: data)
        #expect(body.message == "Hello from Mimicry!")
    }
}

[
  {
    "id": "rule-1",
    "urlPattern": "/api/users",
    "method": "GET",
    "statusCode": 200,
    "responseBody": "{\"users\":[]}",
    "headers": { "Content-Type": "application/json" },
    "enabled": true,
    "domains": ["api.example.com"]
  }
]

{
  "rules": [...],
  "allowedDomains": ["api.example.com"],
  "ignoredDomains": ["*.apple.com"],
  "noCaching": true
}

if [[ "${CI_XCODEBUILD_ACTION:-}" != "test-without-building" ]]; then
    exit 0
fi

[Serve] No network services found

--- Wi-Fi HTTP proxy ---
** Error: Unable to find item in network database.