Fix tests

test/SeederApi.IntegrationTest/HttpClientExtensions.cs

@@ -0,0 +1,41 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Net.Http.Json;
+using System.Text.Json;
+
+namespace Bit.SeederApi.IntegrationTest;
+
+public static class HttpClientExtensions
+{
+    /// <summary>
+    /// Sends a POST request with JSON content and attaches the x-play-id header.
+    /// </summary>
+    /// <typeparam name="TValue">The type of the value to serialize.</typeparam>
+    /// <param name="client">The HTTP client.</param>
+    /// <param name="requestUri">The URI the request is sent to.</param>
+    /// <param name="value">The value to serialize.</param>
+    /// <param name="playId">The play ID to attach as x-play-id header.</param>
+    /// <param name="options">Options to control the behavior during serialization.</param>
+    /// <param name="cancellationToken">A cancellation token that can be used to cancel the operation.</param>
+    /// <returns>The task object representing the asynchronous operation.</returns>
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(
+        this HttpClient client,
+        [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri,
+        TValue value,
+        string playId,
+        JsonSerializerOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(client);
+
+        if (string.IsNullOrWhiteSpace(playId))
+        {
+            throw new ArgumentException("Play ID cannot be null or whitespace.", nameof(playId));
+        }
+
+        var content = JsonContent.Create(value, mediaType: null, options);
+        content.Headers.Remove("x-play-id");
+        content.Headers.Add("x-play-id", playId);
+
+        return client.PostAsync(requestUri, content, cancellationToken);
+    }
+}