Repository: microsoft/semantic-kernel
File: dotnet/src/IntegrationTests/Agents/CommonInterfaceConformance/InvokeConformance/InvokeTests.cs (C#)

Code before:
    {
        // Arrange
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults = agent.InvokeAsync(new ChatMessageContent(AuthorRole.User, "What is the capital of France."));
        var results = await asyncResults.ToListAsync();

        // Assert
        Assert.Single(results);
        var firstResult = results.First();
        Assert.Contains("Paris", firstResult.Message.Content);
        Assert.NotNull(firstResult.Thread);

        // Cleanup
        await this.Fixture.DeleteThread(firstResult.Thread);
    }

    [RetryFact(3, 5000)]
    public virtual async Task InvokeWithoutMessageCreatesThreadAsync()
    {
        // Arrange
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults = agent.InvokeAsync(string.Empty);
        var results = await asyncResults.ToListAsync();

        // Assert
        Assert.Single(results);
        var firstResult = results.First();
        Assert.NotNull(firstResult.Thread);

        // Cleanup
        await this.Fixture.DeleteThread(firstResult.Thread);
    }

    [RetryFact(3, 5000)]
    public virtual async Task ConversationMaintainsHistoryAsync()
    {
        // Arrange
        var q1 = "What is the capital of France.";
        var q2 = "What is the capital of Austria.";
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults1 = agent.InvokeAsync(new ChatMessageContent(AuthorRole.User, q1), this.Fixture.AgentThread);
        var result1 = await asyncResults1.FirstAsync();

        var chatHistory = await this.Fixture.GetChatHistory();
        Assert.Equal(2, chatHistory.Count);

Review comment (suggestion):
Consider changing the test name to `InvokeWithEmptyMessageCreatesThreadAsync`, since it's not without a message anymore.

Code after:
        // Arrange
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults = agent.InvokeAsync(new ChatMessageContent(AuthorRole.User, "What is the capital of France."));
        var results = await asyncResults.ToListAsync();

        // Assert
        var firstResult = Assert.Single(results);
        Assert.Contains("Paris", firstResult.Message.Content);
        Assert.NotNull(firstResult.Thread);

        // Cleanup
        await this.Fixture.DeleteThread(firstResult.Thread);
    }

    [RetryFact(3, 5000)]
    public virtual async Task InvokeWithoutMessageCreatesThreadAsync()
    {
        // Arrange
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults = agent.InvokeAsync();
        var results = await asyncResults.ToListAsync();

        // Assert
        var firstResult = Assert.Single(results);
        Assert.NotNull(firstResult.Thread);

        // Cleanup
        await this.Fixture.DeleteThread(firstResult.Thread);
    }

    [RetryFact(3, 5000)]
    public virtual async Task ConversationMaintainsHistoryAsync()
    {
        // Arrange
        var q1 = "What is the capital of France.";
        var q2 = "What is the capital of Austria.";
        var agent = this.Fixture.Agent;

        // Act
        var asyncResults1 = agent.InvokeAsync(new ChatMessageContent(AuthorRole.User, q1), this.Fixture.AgentThread);
        var result1 = await asyncResults1.FirstAsync();

        var chatHistory = await this.Fixture.GetChatHistory();
        Assert.Equal(2, chatHistory.Count);

        var asyncResults2 = agent.InvokeAsync(new ChatMessageContent(AuthorRole.User, q2), result1.Thread);
        var result2 = await asyncResults2.FirstAsync();