feat(captcha): audio captcha transcription solver

internal/captcha/audio_test.go

@@ -0,0 +1,29 @@
+package captcha
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/lukaszraczylo/captcha-solver-mcp/internal/llm"
+)
+
+func TestSolveAudio(t *testing.T) {
+	f := &llm.Fake{TranscribeResp: "  forty two  "}
+	res, err := SolveAudio(context.Background(), f, []byte("RIFF"), "a.wav", "en")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if res.Text != "forty two" {
+		t.Fatalf("got %q", res.Text)
+	}
+}
+
+func TestSolveAudioUnsupported(t *testing.T) {
+	f := &llm.Fake{TranscribeErr: llm.ErrUnsupported{Provider: "anthropic"}}
+	_, err := SolveAudio(context.Background(), f, []byte{1}, "a.wav", "")
+	var u llm.ErrUnsupported
+	if !errors.As(err, &u) {
+		t.Fatalf("want ErrUnsupported, got %v", err)
+	}
+}