Add tests #3
224
ChatBot.Tests/Models/ChatSessionCompressionTests.cs
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224
ChatBot.Tests/Models/ChatSessionCompressionTests.cs
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using ChatBot.Models;
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using ChatBot.Services.Interfaces;
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using FluentAssertions;
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using Moq;
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using OllamaSharp.Models.Chat;
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namespace ChatBot.Tests.Models;
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public class ChatSessionCompressionTests
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{
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[Fact]
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public async Task CompressHistoryAsync_ShouldCompressMessages_WhenCompressionServiceAvailable()
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{
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// Arrange
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var session = new ChatSession();
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var compressionServiceMock = new Mock<IHistoryCompressionService>();
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session.SetCompressionService(compressionServiceMock.Object);
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// Setup compression service to return compressed messages
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compressionServiceMock
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.Setup(x => x.CompressHistoryAsync(It.IsAny<List<ChatMessage>>(), It.IsAny<int>()))
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.ReturnsAsync(
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new List<ChatMessage>
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{
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new() { Role = ChatRole.System, Content = "System prompt" },
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new() { Role = ChatRole.User, Content = "Compressed user message" },
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}
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);
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// Add messages to session
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for (int i = 0; i < 10; i++)
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{
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session.AddMessage(new ChatMessage { Role = ChatRole.User, Content = $"Message {i}" });
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}
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// Act
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await session.AddMessageWithCompressionAsync(
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new ChatMessage { Role = ChatRole.User, Content = "New message" },
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compressionThreshold: 5,
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compressionTarget: 2
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);
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// Assert
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var messages = session.GetAllMessages();
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messages.Should().HaveCount(2);
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messages[0].Role.Should().Be(ChatRole.System);
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messages[1].Role.Should().Be(ChatRole.User);
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messages[1].Content.Should().Be("Compressed user message");
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}
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[Fact]
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public async Task CompressHistoryAsync_ShouldFallbackToTrimming_WhenCompressionFails()
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{
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// Arrange
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var session = new ChatSession { MaxHistoryLength = 3 };
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var compressionServiceMock = new Mock<IHistoryCompressionService>();
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session.SetCompressionService(compressionServiceMock.Object);
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// Setup compression service to throw an exception
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compressionServiceMock
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.Setup(x => x.CompressHistoryAsync(It.IsAny<List<ChatMessage>>(), It.IsAny<int>()))
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.ThrowsAsync(new Exception("Compression failed"));
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// Add messages to session
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for (int i = 0; i < 5; i++)
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{
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session.AddMessage(new ChatMessage { Role = ChatRole.User, Content = $"Message {i}" });
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}
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// Act
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await session.AddMessageWithCompressionAsync(
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new ChatMessage { Role = ChatRole.User, Content = "New message" },
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compressionThreshold: 3,
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compressionTarget: 2
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);
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// Assert - Should fall back to simple trimming
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var messages = session.GetAllMessages();
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messages.Should().HaveCount(3);
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}
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[Fact]
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public async Task AddMessageWithCompressionAsync_ShouldNotCompress_WhenBelowThreshold()
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{
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// Arrange
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var session = new ChatSession();
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var compressionServiceMock = new Mock<IHistoryCompressionService>();
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session.SetCompressionService(compressionServiceMock.Object);
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// Add messages to session (below threshold)
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session.AddMessage(new ChatMessage { Role = ChatRole.User, Content = "Message 1" });
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session.AddMessage(new ChatMessage { Role = ChatRole.Assistant, Content = "Response 1" });
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// Act - Set threshold higher than current message count
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await session.AddMessageWithCompressionAsync(
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new ChatMessage { Role = ChatRole.User, Content = "Message 2" },
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compressionThreshold: 5,
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compressionTarget: 2
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);
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// Assert - Should not call compression service
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compressionServiceMock.Verify(
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x => x.CompressHistoryAsync(It.IsAny<List<ChatMessage>>(), It.IsAny<int>()),
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Times.Never
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);
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var messages = session.GetAllMessages();
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messages.Should().HaveCount(3);
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}
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[Fact]
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public async Task AddMessageWithCompressionAsync_ShouldHandleConcurrentAccess()
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{
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// Arrange
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var session = new ChatSession();
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var compressionServiceMock = new Mock<IHistoryCompressionService>();
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session.SetCompressionService(compressionServiceMock.Object);
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// Setup compression service to delay to simulate processing time
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compressionServiceMock
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.Setup(x => x.CompressHistoryAsync(It.IsAny<List<ChatMessage>>(), It.IsAny<int>()))
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.ReturnsAsync(
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(List<ChatMessage> messages, int target) =>
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Task.Delay(50)
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.ContinueWith(_ => new List<ChatMessage>
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{
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new() { Role = ChatRole.System, Content = "Compressed" },
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})
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);
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var tasks = new List<Task>();
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int messageCount = 5;
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// Act - Start multiple concurrent operations
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for (int i = 0; i < messageCount; i++)
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{
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tasks.Add(
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session.AddMessageWithCompressionAsync(
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new ChatMessage { Role = ChatRole.User, Content = $"Message {i}" },
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compressionThreshold: 2,
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compressionTarget: 1
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)
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);
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}
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// Wait for all operations to complete
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await Task.WhenAll(tasks);
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// Assert - Should handle concurrent access without exceptions
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// and maintain thread safety
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session.GetMessageCount().Should().Be(1);
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}
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[Fact]
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public void SetCompressionService_ShouldNotThrow_WhenCalledMultipleTimes()
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{
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// Arrange
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var session = new ChatSession();
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var compressionService1 = new Mock<IHistoryCompressionService>().Object;
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var compressionService2 = new Mock<IHistoryCompressionService>().Object;
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// Act & Assert
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session.Invoking(s => s.SetCompressionService(compressionService1)).Should().NotThrow();
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// Should not throw when setting a different service
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session.Invoking(s => s.SetCompressionService(compressionService2)).Should().NotThrow();
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}
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[Fact]
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public async Task CompressHistoryAsync_ShouldPreserveSystemMessage_WhenCompressing()
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{
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// Arrange
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var session = new ChatSession();
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var compressionServiceMock = new Mock<IHistoryCompressionService>();
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session.SetCompressionService(compressionServiceMock.Object);
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// Setup compression service to preserve system message
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compressionServiceMock
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.Setup(x => x.CompressHistoryAsync(It.IsAny<List<ChatMessage>>(), It.IsAny<int>()))
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.ReturnsAsync(
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(List<ChatMessage> messages, int target) =>
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{
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var systemMessage = messages.FirstOrDefault(m => m.Role == ChatRole.System);
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var compressed = new List<ChatMessage>();
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if (systemMessage != null)
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{
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compressed.Add(systemMessage);
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}
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compressed.Add(
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new ChatMessage
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{
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Role = ChatRole.User,
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Content = "Compressed user messages",
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}
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);
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return compressed;
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}
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);
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// Add system message and some user messages
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session.AddMessage(new ChatMessage { Role = ChatRole.System, Content = "System prompt" });
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for (int i = 0; i < 10; i++)
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{
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session.AddMessage(new ChatMessage { Role = ChatRole.User, Content = $"Message {i}" });
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}
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// Act
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await session.AddMessageWithCompressionAsync(
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new ChatMessage { Role = ChatRole.User, Content = "New message" },
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compressionThreshold: 5,
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compressionTarget: 2
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);
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// Assert - System message should be preserved
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var messages = session.GetAllMessages();
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messages.Should().HaveCount(2);
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messages[0].Role.Should().Be(ChatRole.System);
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messages[0].Content.Should().Be("System prompt");
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messages[1].Content.Should().Be("Compressed user messages");
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}
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}
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