feat: add class for representing batch statuses

src/AnthropicClient/Models/MessageBatchStatus.cs

@@ -0,0 +1,22 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents the status of a message batch.
+/// </summary>
+public static class MessageBatchStatus
+{
+  /// <summary>
+  /// The status of a message batch that is being canceled.
+  /// </summary>
+  public const string Canceling = "canceling";
+  
+  /// <summary>
+  /// The status of a message batch that is in progress.
+  /// </summary>
+  public const string InProgress = "in_progress";
+  
+  /// <summary>
+  /// The status of a message batch that has ended.
+  /// </summary>
+  public const string Ended = "ended";
+}

tests/AnthropicClient.Tests/Unit/Models/MessageBatchStatusTests.cs

@@ -0,0 +1,22 @@
+namespace AnthropicClient.Tests.Unit.Models;
+
+public class MessageBatchStatusTests
+{
+  [Fact]
+  public void Canceling_WhenCalled_ItShouldReturnCancelingStatus()
+  {
+    MessageBatchStatus.Canceling.Should().Be("canceling");
+  }
+  
+  [Fact]
+  public void InProgress_WhenCalled_ItShouldReturnCancelingStatus()
+  {
+    MessageBatchStatus.InProgress.Should().Be("in_progress");
+  }
+  
+  [Fact]
+  public void Ended_WhenCalled_ItShouldReturnCancelingStatus()
+  {
+    MessageBatchStatus.Ended.Should().Be("ended");
+  }
+}