meeting-assistant/MeetingAssistant.Tests/AzureSpeechStreamingTranscriptionProviderTests.cs

using MeetingAssistant.Recording;
using MeetingAssistant.Transcription;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;

namespace MeetingAssistant.Tests;

public sealed class AzureSpeechStreamingTranscriptionProviderTests
{
    [Fact]
    public async Task TranscribeFailsClearlyWhenKeyIsMissing()
    {
        var provider = new AzureSpeechStreamingTranscriptionProvider(
            Options.Create(new MeetingAssistantOptions
            {
                AzureSpeech = new AzureSpeechOptions
                {
                    Region = "germanywestcentral",
                    KeyEnv = $"MEETING_ASSISTANT_MISSING_AZURE_KEY_{Guid.NewGuid():N}"
                }
            }),
            NullLogger<AzureSpeechStreamingTranscriptionProvider>.Instance);

        var exception = await Assert.ThrowsAsync<InvalidOperationException>(async () =>
        {
            await foreach (var _ in provider.TranscribeAsync(ReadSingleChunk(), CancellationToken.None))
            {
            }
        });

        Assert.Contains("Azure Speech key is not configured", exception.Message);
    }

    private static async IAsyncEnumerable<AudioChunk> ReadSingleChunk()
    {
        await Task.Yield();
        yield return new AudioChunk(new byte[320], 16000, 1);
    }
}