[AC-2488] Add billing endpoint to determine SM standalone for organization (#4014)

* Add billing endpoint to determine SM standalone for org.

* Add missing attribute

test/Api.Test/Billing/Controllers/OrganizationBillingControllerTests.cs

@@ -0,0 +1,43 @@
+using Bit.Api.Billing.Controllers;
+using Bit.Api.Billing.Models.Responses;
+using Bit.Core.Billing.Models;
+using Bit.Core.Billing.Queries;
+using Bit.Test.Common.AutoFixture;
+using Bit.Test.Common.AutoFixture.Attributes;
+using Microsoft.AspNetCore.Http.HttpResults;
+using NSubstitute;
+using Xunit;
+
+namespace Bit.Api.Test.Billing.Controllers;
+
+[ControllerCustomize(typeof(OrganizationBillingController))]
+[SutProviderCustomize]
+public class OrganizationBillingControllerTests
+{
+    [Theory, BitAutoData]
+    public async Task GetMetadataAsync_MetadataNull_NotFound(
+        Guid organizationId,
+        SutProvider<OrganizationBillingController> sutProvider)
+    {
+        var result = await sutProvider.Sut.GetMetadataAsync(organizationId);
+
+        Assert.IsType<NotFound>(result);
+    }
+
+    [Theory, BitAutoData]
+    public async Task GetMetadataAsync_OK(
+        Guid organizationId,
+        SutProvider<OrganizationBillingController> sutProvider)
+    {
+        sutProvider.GetDependency<IOrganizationBillingQueries>().GetMetadata(organizationId)
+            .Returns(new OrganizationMetadataDTO(true));
+
+        var result = await sutProvider.Sut.GetMetadataAsync(organizationId);
+
+        Assert.IsType<Ok<OrganizationMetadataResponse>>(result);
+
+        var organizationMetadataResponse = ((Ok<OrganizationMetadataResponse>)result).Value;
+
+        Assert.True(organizationMetadataResponse.IsOnSecretsManagerStandalone);
+    }
+}

test/Core.Test/Billing/Queries/OrganizationBillingQueriesTests.cs

@@ -0,0 +1,105 @@
+using Bit.Core.AdminConsole.Entities;
+using Bit.Core.Billing.Constants;
+using Bit.Core.Billing.Queries;
+using Bit.Core.Billing.Queries.Implementations;
+using Bit.Core.Repositories;
+using Bit.Test.Common.AutoFixture;
+using Bit.Test.Common.AutoFixture.Attributes;
+using NSubstitute;
+using Stripe;
+using Xunit;
+
+namespace Bit.Core.Test.Billing.Queries;
+
+[SutProviderCustomize]
+public class OrganizationBillingQueriesTests
+{
+    #region GetMetadata
+    [Theory, BitAutoData]
+    public async Task GetMetadata_OrganizationNull_ReturnsNull(
+        Guid organizationId,
+        SutProvider<OrganizationBillingQueries> sutProvider)
+    {
+        var metadata = await sutProvider.Sut.GetMetadata(organizationId);
+
+        Assert.Null(metadata);
+    }
+
+    [Theory, BitAutoData]
+    public async Task GetMetadata_CustomerNull_ReturnsNull(
+        Guid organizationId,
+        Organization organization,
+        SutProvider<OrganizationBillingQueries> sutProvider)
+    {
+        sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(organizationId).Returns(organization);
+
+        var metadata = await sutProvider.Sut.GetMetadata(organizationId);
+
+        Assert.Null(metadata);
+    }
+
+    [Theory, BitAutoData]
+    public async Task GetMetadata_SubscriptionNull_ReturnsNull(
+        Guid organizationId,
+        Organization organization,
+        SutProvider<OrganizationBillingQueries> sutProvider)
+    {
+        sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(organizationId).Returns(organization);
+
+        sutProvider.GetDependency<ISubscriberQueries>().GetCustomer(organization).Returns(new Customer());
+
+        var metadata = await sutProvider.Sut.GetMetadata(organizationId);
+
+        Assert.Null(metadata);
+    }
+
+    [Theory, BitAutoData]
+    public async Task GetMetadata_Succeeds(
+        Guid organizationId,
+        Organization organization,
+        SutProvider<OrganizationBillingQueries> sutProvider)
+    {
+        sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(organizationId).Returns(organization);
+
+        var subscriberQueries = sutProvider.GetDependency<ISubscriberQueries>();
+
+        subscriberQueries
+            .GetCustomer(organization, Arg.Is<CustomerGetOptions>(options => options.Expand.FirstOrDefault() == "discount.coupon.applies_to"))
+            .Returns(new Customer
+            {
+                Discount = new Discount
+                {
+                    Coupon = new Coupon
+                    {
+                        Id = StripeConstants.CouponIDs.SecretsManagerStandalone,
+                        AppliesTo = new CouponAppliesTo
+                        {
+                            Products = ["product_id"]
+                        }
+                    }
+                }
+            });
+
+        subscriberQueries.GetSubscription(organization).Returns(new Subscription
+        {
+            Items = new StripeList<SubscriptionItem>
+            {
+                Data =
+                [
+                    new SubscriptionItem
+                    {
+                        Plan = new Plan
+                        {
+                            ProductId = "product_id"
+                        }
+                    }
+                ]
+            }
+        });
+
+        var metadata = await sutProvider.Sut.GetMetadata(organizationId);
+
+        Assert.True(metadata.IsOnSecretsManagerStandalone);
+    }
+    #endregion
+}