test: cover llm runtime provider errors

internal/llmruntime/runtime_test.go

@@ -0,0 +1,61 @@
+package llmruntime
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestOpenAICompatibleClient_ForwardsTemperatureAndMaxTokens(t *testing.T) {
+	t.Parallel()
+
+	var got struct {
+		Temperature float64 `json:"temperature"`
+		MaxTokens   int     `json:"max_tokens"`
+	}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_ = json.NewDecoder(r.Body).Decode(&got)
+		_, _ = w.Write([]byte(`{"choices":[{"message":{"content":"ok"}}]}`))
+	}))
+	defer server.Close()
+
+	factory := NewFactory(2 * time.Second)
+	client, err := factory.ClientFor("openai")
+	if err != nil {
+		t.Fatalf("client creation failed: %v", err)
+	}
+	temperature := 0.77
+	maxTokens := 777
+	_, err = client.Generate(context.Background(), Request{
+		Provider:     "openai",
+		BaseURL:      server.URL,
+		Model:        "gpt-5.4",
+		APIKey:       "key",
+		Temperature:  &temperature,
+		MaxTokens:    &maxTokens,
+		SystemPrompt: "system",
+		UserPrompt:   "user",
+	})
+	if err != nil {
+		t.Fatalf("generate failed: %v", err)
+	}
+	if got.Temperature != 0.77 {
+		t.Fatalf("unexpected temperature: %v", got.Temperature)
+	}
+	if got.MaxTokens != 777 {
+		t.Fatalf("unexpected max tokens: %v", got.MaxTokens)
+	}
+}
+
+func TestExtractProviderErrorMessage(t *testing.T) {
+	t.Parallel()
+
+	msg := extractProviderErrorMessage([]byte(`{"error":{"message":"invalid key"}}`))
+	if !strings.Contains(msg, "invalid key") {
+		t.Fatalf("unexpected message: %q", msg)
+	}
+}