Added the catalogue models and seed to support phase 2 of the POC prototype in the Persistence package.

Packages/Persistence/Tests/Cases/Public/Repositories/AccountRepositoryTests.swift

@@ -0,0 +1,35 @@
+import Testing
+
+@testable import Persistence
+
+@Suite(
+    "AccountRepository repository",
+    .tags(.repository)
+)
+struct AccountRepositoryTests {
+
+    // MARK: Methods tests
+
+    @Test
+    func `finds the seeded demo buyer`() async throws {
+        try await withDatabase { fluent in
+            let user = try await AccountRepository(fluent: fluent).account(email: AccountRepository.demoEmail)
+
+            #expect(user.email == "mara.v@example.com")
+            #expect(user.displayName == "Mara Visser")
+        }
+    }
+
+    @Test
+    func `joins an unknown email once, named after its local part`() async throws {
+        try await withDatabase { fluent in
+            let repository = AccountRepository(fluent: fluent)
+            let joined = try await repository.account(email: "sam@example.com")
+            let returning = try await repository.account(email: "sam@example.com")
+
+            #expect(joined.displayName == "sam")
+            #expect(returning == joined)
+        }
+    }
+
+}