Add comprehensive unit tests for backend services and controllers
- Add API.Tests xUnit project with Moq and EF Core InMemory - Add AgeGroupService tests (CRUD operations, edge cases) - Add RegistrationKeyService tests (CRUD + DeleteOldRegistrationKeys) - Add AgeGroupController tests (all endpoints with mocked service) - Add PlunkEmailSender tests (HTTP client mocking, payload verification) - Add Mapper tests (AltersgruppeMapper, RegistrationKeyMapper) https://claude.ai/code/session_01Kv7Mp2c9FKsHEgQe4BoftH
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Claude
214
API.Tests/Services/PlunkEmailSenderTests.cs
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214
API.Tests/Services/PlunkEmailSenderTests.cs
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using System.Net;
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using System.Text.Json;
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using API.Models.Outgoing;
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using API.Services;
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using Moq;
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using Moq.Protected;
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namespace API.Tests.Services;
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public class PlunkEmailSenderTests
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{
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private const string TestSecretKey = "test-secret-key";
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private const string PlunkApiUrl = "https://api.useplunk.com/v1/send";
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private static HttpClient CreateMockHttpClient(HttpStatusCode statusCode, string responseContent = "{}")
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{
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var mockHandler = new Mock<HttpMessageHandler>();
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mockHandler
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.Protected()
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.Setup<Task<HttpResponseMessage>>(
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"SendAsync",
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ItExpr.IsAny<HttpRequestMessage>(),
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ItExpr.IsAny<CancellationToken>())
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.ReturnsAsync(new HttpResponseMessage
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{
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StatusCode = statusCode,
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Content = new StringContent(responseContent)
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});
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return new HttpClient(mockHandler.Object);
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}
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private static (HttpClient client, Mock<HttpMessageHandler> handler) CreateMockHttpClientWithHandler(
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HttpStatusCode statusCode, string responseContent = "{}")
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{
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var mockHandler = new Mock<HttpMessageHandler>();
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mockHandler
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.Protected()
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.Setup<Task<HttpResponseMessage>>(
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"SendAsync",
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ItExpr.IsAny<HttpRequestMessage>(),
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ItExpr.IsAny<CancellationToken>())
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.ReturnsAsync(new HttpResponseMessage
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{
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StatusCode = statusCode,
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Content = new StringContent(responseContent)
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});
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return (new HttpClient(mockHandler.Object), mockHandler);
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}
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[Fact]
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public async Task SendEmailAsync_SuccessfulSend_DoesNotThrow()
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{
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// Arrange
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var httpClient = CreateMockHttpClient(HttpStatusCode.OK);
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act & Assert - should not throw
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await emailSender.SendEmailAsync("test@example.com", "Test Subject", "<p>Test Body</p>");
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}
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[Fact]
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public async Task SendEmailAsync_ApiReturnsError_ThrowsException()
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{
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// Arrange
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var errorMessage = "Invalid API key";
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var httpClient = CreateMockHttpClient(HttpStatusCode.Unauthorized, errorMessage);
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act & Assert
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var exception = await Assert.ThrowsAsync<Exception>(() =>
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emailSender.SendEmailAsync("test@example.com", "Test Subject", "<p>Test Body</p>"));
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Assert.Contains("Fehler beim Senden der E-Mail über Plunk", exception.Message);
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Assert.Contains(errorMessage, exception.Message);
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}
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[Fact]
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public async Task SendEmailAsync_ServerError_ThrowsException()
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{
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// Arrange
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var httpClient = CreateMockHttpClient(HttpStatusCode.InternalServerError, "Server error");
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act & Assert
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await Assert.ThrowsAsync<Exception>(() =>
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emailSender.SendEmailAsync("test@example.com", "Test Subject", "<p>Test Body</p>"));
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}
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[Fact]
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public async Task SendEmailAsync_BadRequest_ThrowsException()
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{
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// Arrange
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var httpClient = CreateMockHttpClient(HttpStatusCode.BadRequest, "Invalid request");
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act & Assert
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await Assert.ThrowsAsync<Exception>(() =>
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emailSender.SendEmailAsync("test@example.com", "Test Subject", "<p>Test Body</p>"));
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}
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[Fact]
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public async Task SendEmailAsync_SendsCorrectPayload()
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{
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// Arrange
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var mockHandler = new Mock<HttpMessageHandler>();
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HttpRequestMessage? capturedRequest = null;
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mockHandler
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.Protected()
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.Setup<Task<HttpResponseMessage>>(
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"SendAsync",
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ItExpr.IsAny<HttpRequestMessage>(),
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ItExpr.IsAny<CancellationToken>())
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.Callback<HttpRequestMessage, CancellationToken>((request, _) => capturedRequest = request)
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.ReturnsAsync(new HttpResponseMessage
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{
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StatusCode = HttpStatusCode.OK,
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Content = new StringContent("{}")
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});
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var httpClient = new HttpClient(mockHandler.Object);
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act
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await emailSender.SendEmailAsync("recipient@example.com", "My Subject", "<h1>Hello</h1>");
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// Assert
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Assert.NotNull(capturedRequest);
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Assert.Equal(HttpMethod.Post, capturedRequest.Method);
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Assert.Equal(PlunkApiUrl, capturedRequest.RequestUri?.ToString());
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var requestContent = await capturedRequest.Content!.ReadAsStringAsync();
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var payload = JsonSerializer.Deserialize<PlunkEmailDto>(requestContent, new JsonSerializerOptions
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{
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PropertyNameCaseInsensitive = true
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});
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Assert.NotNull(payload);
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Assert.Equal("recipient@example.com", payload.To);
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Assert.Equal("My Subject", payload.Subject);
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Assert.Equal("<h1>Hello</h1>", payload.Body);
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}
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[Fact]
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public async Task SendEmailAsync_SendsCorrectAuthorizationHeader()
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{
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// Arrange
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var mockHandler = new Mock<HttpMessageHandler>();
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HttpRequestMessage? capturedRequest = null;
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mockHandler
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.Protected()
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.Setup<Task<HttpResponseMessage>>(
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"SendAsync",
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ItExpr.IsAny<HttpRequestMessage>(),
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ItExpr.IsAny<CancellationToken>())
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.Callback<HttpRequestMessage, CancellationToken>((request, _) => capturedRequest = request)
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.ReturnsAsync(new HttpResponseMessage
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{
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StatusCode = HttpStatusCode.OK,
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Content = new StringContent("{}")
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});
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var httpClient = new HttpClient(mockHandler.Object);
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var emailSender = new PlunkEmailSender(httpClient, "my-secret-api-key");
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// Act
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await emailSender.SendEmailAsync("test@example.com", "Subject", "Body");
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// Assert
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Assert.NotNull(capturedRequest);
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var authHeader = httpClient.DefaultRequestHeaders.Authorization;
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Assert.NotNull(authHeader);
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Assert.Equal("Bearer", authHeader.Scheme);
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Assert.Equal("my-secret-api-key", authHeader.Parameter);
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}
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[Fact]
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public async Task SendEmailAsync_SendsCorrectContentType()
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{
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// Arrange
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var mockHandler = new Mock<HttpMessageHandler>();
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HttpRequestMessage? capturedRequest = null;
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mockHandler
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.Protected()
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.Setup<Task<HttpResponseMessage>>(
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"SendAsync",
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ItExpr.IsAny<HttpRequestMessage>(),
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ItExpr.IsAny<CancellationToken>())
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.Callback<HttpRequestMessage, CancellationToken>((request, _) => capturedRequest = request)
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.ReturnsAsync(new HttpResponseMessage
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{
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StatusCode = HttpStatusCode.OK,
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Content = new StringContent("{}")
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});
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var httpClient = new HttpClient(mockHandler.Object);
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var emailSender = new PlunkEmailSender(httpClient, TestSecretKey);
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// Act
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await emailSender.SendEmailAsync("test@example.com", "Subject", "Body");
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// Assert
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Assert.NotNull(capturedRequest);
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Assert.NotNull(capturedRequest.Content);
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Assert.Equal("application/json", capturedRequest.Content.Headers.ContentType?.MediaType);
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Assert.Equal("utf-8", capturedRequest.Content.Headers.ContentType?.CharSet);
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}
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}
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