Started off well

Tests/MusicBrainzTests/MusicBrainzTests.swift

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+import Foundation
+import Testing
+
+@testable import MusicBrainz
+
+#if canImport(FoundationNetworking)
+	import FoundationNetworking
+#endif
+
+@Test func testArtistDecoding() throws {
+	let json = """
+		{
+		    "id": "f27ec8db-af05-4f36-916e-3d57f91ecf5e",
+		    "name": "Michael Jackson",
+		    "sort-name": "Jackson, Michael",
+		    "type": "Person",
+		    "country": "US",
+		    "disambiguation": "“King of Pop”"
+		}
+		""".data(using: .utf8)!
+
+	let artist = try JSONDecoder().decode(Artist.self, from: json)
+
+	#expect(artist.id == "f27ec8db-af05-4f36-916e-3d57f91ecf5e")
+	#expect(artist.name == "Michael Jackson")
+	#expect(artist.sortName == "Jackson, Michael")
+	#expect(artist.type == "Person")
+	#expect(artist.country == "US")
+	#expect(artist.disambiguation == "“King of Pop”")
+}
+
+@Test func testCoordinatorRateLimiting() async throws {
+	let coordinator = MusicBrainzCoordinator()
+	let request = URLRequest(url: URL(string: "https://example.com")!)
+
+	let clock = ContinuousClock()
+	let start = clock.now
+
+	// Perform 3 requests concurrently
+	try await withThrowingTaskGroup(of: Void.self) { group in
+		for _ in 0..<3 {
+			group.addTask {
+				_ = try await coordinator.perform(request)
+			}
+		}
+	}
+
+	let duration = start.duration(to: clock.now)
+
+	// 3 requests should take at least 2 seconds (0s, 1s, 2s)
+	// We check for > 1.9s to account for small timing variations
+	#expect(duration >= .seconds(2))
+	print("DEBUG: Total duration for 3 requests: \(duration)")
+}