2 files changed, 167 insertions, 0 deletions
diff --git a/src/cart/tests/CartServiceTests.cs b/src/cart/tests/CartServiceTests.cs
new file mode 100644
index 0000000..45173d1
--- /dev/null
+++ b/src/cart/tests/CartServiceTests.cs
@@ -0,0 +1,146 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+using System;
+using System.Threading.Tasks;
+using Grpc.Net.Client;
+using Oteldemo;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.Hosting;
+using Xunit;
+using static Oteldemo.CartService;
+
+namespace cart.tests;
+
+public class CartServiceTests
+{
+    private readonly IHostBuilder _host;
+
+    public CartServiceTests()
+    {
+        _host = new HostBuilder().ConfigureWebHost(webBuilder =>
+        {
+            webBuilder
+                //  .UseStartup<Startup>()
+                .UseTestServer();
+        });
+    }
+
+    [Fact(Skip = "See https://github.com/open-telemetry/opentelemetry-demo/pull/746#discussion_r1107931240")]
+    public async Task GetItem_NoAddItemBefore_EmptyCartReturned()
+    {
+        // Setup test server and client
+        using var server = await _host.StartAsync();
+        var httpClient = server.GetTestClient();
+
+        string userId = Guid.NewGuid().ToString();
+
+        // Create a GRPC communication channel between the client and the server
+        var channel = GrpcChannel.ForAddress(httpClient.BaseAddress, new GrpcChannelOptions
+        {
+            HttpClient = httpClient
+        });
+
+        var cartClient = new CartServiceClient(channel);
+
+        var request = new GetCartRequest
+        {
+            UserId = userId,
+        };
+
+        var cart = await cartClient.GetCartAsync(request);
+        Assert.NotNull(cart);
+
+        // All grpc objects implement IEquitable, so we can compare equality with by-value semantics
+        Assert.Equal(new Cart(), cart);
+    }
+
+    [Fact(Skip = "See https://github.com/open-telemetry/opentelemetry-demo/pull/746#discussion_r1107931240")]
+    public async Task AddItem_ItemExists_Updated()
+    {
+        // Setup test server and client
+        using var server = await _host.StartAsync();
+        var httpClient = server.GetTestClient();
+
+        string userId = Guid.NewGuid().ToString();
+
+        // Create a GRPC communication channel between the client and the server
+        var channel = GrpcChannel.ForAddress(httpClient.BaseAddress, new GrpcChannelOptions
+        {
+            HttpClient = httpClient
+        });
+
+        var client = new CartServiceClient(channel);
+        var request = new AddItemRequest
+        {
+            UserId = userId,
+            Item = new CartItem
+            {
+                ProductId = "1",
+                Quantity = 1
+            }
+        };
+
+        // First add - nothing should fail
+        await client.AddItemAsync(request);
+
+        // Second add of existing product - quantity should be updated
+        await client.AddItemAsync(request);
+
+        var getCartRequest = new GetCartRequest
+        {
+            UserId = userId
+        };
+        var cart = await client.GetCartAsync(getCartRequest);
+        Assert.NotNull(cart);
+        Assert.Equal(userId, cart.UserId);
+        Assert.Single(cart.Items);
+        Assert.Equal(2, cart.Items[0].Quantity);
+
+        // Cleanup
+        await client.EmptyCartAsync(new EmptyCartRequest { UserId = userId });
+    }
+
+    [Fact(Skip = "See https://github.com/open-telemetry/opentelemetry-demo/pull/746#discussion_r1107931240")]
+    public async Task AddItem_New_Inserted()
+    {
+        // Setup test server and client
+        using var server = await _host.StartAsync();
+        var httpClient = server.GetTestClient();
+
+        string userId = Guid.NewGuid().ToString();
+
+        // Create a GRPC communication channel between the client and the server
+        var channel = GrpcChannel.ForAddress(httpClient.BaseAddress, new GrpcChannelOptions
+        {
+            HttpClient = httpClient
+        });
+
+        // Create a proxy object to work with the server
+        var client = new CartServiceClient(channel);
+
+        var request = new AddItemRequest
+        {
+            UserId = userId,
+            Item = new CartItem
+            {
+                ProductId = "1",
+                Quantity = 1
+            }
+        };
+
+        await client.AddItemAsync(request);
+
+        var getCartRequest = new GetCartRequest
+        {
+            UserId = userId
+        };
+        var cart = await client.GetCartAsync(getCartRequest);
+        Assert.NotNull(cart);
+        Assert.Equal(userId, cart.UserId);
+        Assert.Single(cart.Items);
+
+        await client.EmptyCartAsync(new EmptyCartRequest { UserId = userId });
+        cart = await client.GetCartAsync(getCartRequest);
+        Assert.Empty(cart.Items);
+    }
+}
diff --git a/src/cart/tests/cart.tests.csproj b/src/cart/tests/cart.tests.csproj
new file mode 100644
index 0000000..8c32df7
--- /dev/null
+++ b/src/cart/tests/cart.tests.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Grpc.Net.Client" Version="2.70.0" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.13" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\src\cart.csproj" />
+  </ItemGroup>
+</Project>