too much for one commit

tests/EntKube.Provisioning.Tests/Features/TriggerSyncHandlerTests.cs

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+using EntKube.Provisioning.Domain;
+using EntKube.Provisioning.Features.Apps.TriggerSync;
+using EntKube.Provisioning.Infrastructure;
+using EntKube.SharedKernel.Domain;
+using FluentAssertions;
+
+namespace EntKube.Provisioning.Tests.Features;
+
+public class TriggerSyncHandlerTests
+{
+    private readonly InMemoryAppRepository repository;
+    private readonly TriggerSyncHandler handler;
+
+    public TriggerSyncHandlerTests()
+    {
+        repository = new InMemoryAppRepository();
+        handler = new TriggerSyncHandler(repository);
+    }
+
+    [Fact]
+    public async Task HandleAsync_SyncedEnvironment_MarksPending()
+    {
+        // Arrange — An environment that was previously synced. The user
+        // wants to force a re-sync (e.g., after a config change outside
+        // the UI or to retry after fixing a problem).
+
+        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
+        Guid envId = Guid.NewGuid();
+        AppEnvironment env = app.AddEnvironment(envId, Guid.NewGuid(), "api-dev");
+
+        env.ConfigureDeployment(new DeploymentSpec(
+            Image: "api", Tag: "v1", Replicas: 1,
+            ContainerPort: 8080, ServicePort: 80,
+            HostName: null, PathPrefix: null,
+            EnvironmentVariables: null, Resources: null));
+
+        env.MarkSynced();
+        await repository.AddAsync(app);
+
+        // Act
+
+        Result result = await handler.HandleAsync(new TriggerSyncRequest(app.Id, envId));
+
+        // Assert — Should be marked Pending so the reconciler picks it up.
+
+        result.IsSuccess.Should().BeTrue();
+        App? updated = await repository.GetByIdAsync(app.Id);
+        updated!.Environments[0].SyncStatus.Should().Be(AppSyncStatus.Pending);
+    }
+
+    [Fact]
+    public async Task HandleAsync_ErrorEnvironment_MarksPendingForRetry()
+    {
+        // Arrange — An environment in error state. The admin fixes the issue
+        // and wants to retry the sync.
+
+        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
+        Guid envId = Guid.NewGuid();
+        AppEnvironment env = app.AddEnvironment(envId, Guid.NewGuid(), "api-dev");
+
+        env.ConfigureDeployment(new DeploymentSpec(
+            Image: "api", Tag: "v1", Replicas: 1,
+            ContainerPort: 8080, ServicePort: 80,
+            HostName: null, PathPrefix: null,
+            EnvironmentVariables: null, Resources: null));
+
+        env.MarkError("Connection refused");
+        await repository.AddAsync(app);
+
+        // Act
+
+        Result result = await handler.HandleAsync(new TriggerSyncRequest(app.Id, envId));
+
+        // Assert
+
+        result.IsSuccess.Should().BeTrue();
+        App? updated = await repository.GetByIdAsync(app.Id);
+        updated!.Environments[0].SyncStatus.Should().Be(AppSyncStatus.Pending);
+    }
+
+    [Fact]
+    public async Task HandleAsync_NonexistentApp_ReturnsFailure()
+    {
+        // Act
+
+        Result result = await handler.HandleAsync(
+            new TriggerSyncRequest(Guid.NewGuid(), Guid.NewGuid()));
+
+        // Assert
+
+        result.IsFailure.Should().BeTrue();
+        result.Error.Should().Contain("not found");
+    }
+}