too much for one commit

tests/EntKube.Identity.Tests/Features/GetTenantsHandlerTests.cs

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+using EntKube.Identity.Domain;
+using EntKube.Identity.Features.GetTenants;
+using EntKube.Identity.Infrastructure;
+using FluentAssertions;
+
+namespace EntKube.Identity.Tests.Features;
+
+public class GetTenantsHandlerTests
+{
+    private readonly InMemoryTenantRepository repository;
+
+    public GetTenantsHandlerTests()
+    {
+        repository = new InMemoryTenantRepository();
+    }
+
+    [Fact]
+    public async Task GetAllAsync_WithTenants_ReturnsList()
+    {
+        // Arrange — Two tenants exist in the repository.
+
+        Tenant tenant1 = Tenant.Create("Acme Corp", "acme", Guid.NewGuid());
+        Tenant tenant2 = Tenant.Create("Globex", "globex", Guid.NewGuid());
+
+        await repository.AddAsync(tenant1);
+        await repository.AddAsync(tenant2);
+
+        // Act — Retrieve all tenants via the repository (endpoint uses it directly).
+
+        IReadOnlyList<Tenant> tenants = await repository.GetAllAsync();
+
+        // Assert
+
+        tenants.Should().HaveCount(2);
+        tenants.Should().Contain(t => t.Name == "Acme Corp");
+        tenants.Should().Contain(t => t.Name == "Globex");
+    }
+
+    [Fact]
+    public async Task GetAllAsync_Empty_ReturnsEmptyList()
+    {
+        // Act
+
+        IReadOnlyList<Tenant> tenants = await repository.GetAllAsync();
+
+        // Assert
+
+        tenants.Should().BeEmpty();
+    }
+}