[SM-153] Add scaffolded API integration test project (#2209)

test/Api.IntegrationTest/Api.IntegrationTest.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNetTestSdkVersion)" />
+    <PackageReference Include="xunit" Version="$(XUnitVersion)" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="$(XUnitRunnerVisualStudioVersion)">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="$(CoverletCollectorVersion)">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Api\Api.csproj" />
+    <ProjectReference Include="..\IntegrationTestCommon\IntegrationTestCommon.csproj" />
+
+    <Content Include="..\..\src\Api\appsettings.*.json">
+      <Link>%(RecursiveDir)%(Filename)%(Extension)</Link>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+</Project>

test/Api.IntegrationTest/Controllers/AccountsControllerTests.cs

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+using System.Net.Http.Headers;
+using Bit.Api.IntegrationTest.Factories;
+using Bit.Api.Models.Response;
+using Xunit;
+
+namespace Bit.Api.IntegrationTest.Controllers;
+
+public class AccountsControllerTest : IClassFixture<ApiApplicationFactory>
+{
+    private readonly ApiApplicationFactory _factory;
+
+    public AccountsControllerTest(ApiApplicationFactory factory) => _factory = factory;
+
+    [Fact]
+    public async Task GetPublicKey()
+    {
+        var tokens = await _factory.LoginWithNewAccount();
+        var client = _factory.CreateClient();
+
+        using var message = new HttpRequestMessage(HttpMethod.Get, "/accounts/profile");
+        message.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.Token);
+        var response = await client.SendAsync(message);
+
+        response.EnsureSuccessStatusCode();
+
+        var content = await response.Content.ReadFromJsonAsync<ProfileResponseModel>();
+
+        Assert.NotEmpty(content.Id);
+        Assert.Equal("integration-test@bitwarden.com", content.Email);
+        Assert.Null(content.Name);
+        Assert.False(content.EmailVerified);
+        Assert.False(content.Premium);
+        Assert.False(content.PremiumFromOrganization);
+        Assert.Null(content.MasterPasswordHint);
+        Assert.Equal("en-US", content.Culture);
+        Assert.Null(content.Key);
+        Assert.Null(content.PrivateKey);
+        Assert.NotNull(content.SecurityStamp);
+    }
+}

test/Api.IntegrationTest/Factories/ApiApplicationFactory.cs

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+using Bit.Core.Models.Api.Request.Accounts;
+using Bit.IntegrationTestCommon.Factories;
+using IdentityServer4.AccessTokenValidation;
+using Microsoft.AspNetCore.TestHost;
+
+namespace Bit.Api.IntegrationTest.Factories
+{
+    public class ApiApplicationFactory : WebApplicationFactoryBase<Startup>
+    {
+        private readonly IdentityApplicationFactory _identityApplicationFactory;
+
+        public ApiApplicationFactory()
+        {
+            _identityApplicationFactory = new IdentityApplicationFactory();
+        }
+
+        protected override void ConfigureWebHost(IWebHostBuilder builder)
+        {
+            base.ConfigureWebHost(builder);
+
+            builder.ConfigureTestServices(services =>
+            {
+                services.PostConfigure<IdentityServerAuthenticationOptions>(IdentityServerAuthenticationDefaults.AuthenticationScheme, options =>
+                {
+                    options.JwtBackChannelHandler = _identityApplicationFactory.Server.CreateHandler();
+                });
+            });
+        }
+
+        /// <summary>
+        /// Helper for registering and logging in to a new account
+        /// </summary>
+        public async Task<(string Token, string RefreshToken)> LoginWithNewAccount(string email = "integration-test@bitwarden.com", string masterPasswordHash = "master_password_hash")
+        {
+            await _identityApplicationFactory.RegisterAsync(new RegisterRequestModel
+            {
+                Email = email,
+                MasterPasswordHash = masterPasswordHash,
+            });
+
+            return await _identityApplicationFactory.TokenFromPasswordAsync(email, masterPasswordHash);
+        }
+    }
+}