Add go-llm v1 chat Client with OpenAI-compatible and Ollama adapters.

Co-authored-by: Cursor <cursoragent@cursor.com>

openai_adapter_test.go

@@ -0,0 +1,122 @@
+package gollm_test
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	gollm "gitea.neitzel.de/konrad/go-llm"
+)
+
+func TestChatReturnsAssistantTextFromOpenAICompatibleServer(t *testing.T) {
+	var gotBody map[string]any
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/chat/completions" || r.Method != http.MethodPost {
+			t.Errorf("got %s %s", r.Method, r.URL.Path)
+		}
+		if r.Header.Get("Authorization") != "Bearer secret-key" {
+			t.Errorf("Authorization %q", r.Header.Get("Authorization"))
+		}
+		if err := json.NewDecoder(r.Body).Decode(&gotBody); err != nil {
+			t.Fatal(err)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		io.WriteString(w, `{"choices":[{"message":{"role":"assistant","content":"Once upon a time."}}]}`)
+	}))
+	t.Cleanup(srv.Close)
+
+	client, err := gollm.NewClient(gollm.AdapterOpenAI, srv.URL, "secret-key")
+	if err != nil {
+		t.Fatal(err)
+	}
+	temp := 0.2
+	maxTok := 64
+	text, err := client.Chat(context.Background(), []gollm.Message{
+		{Role: gollm.RoleSystem, Content: "You write prose."},
+		{Role: gollm.RoleUser, Content: "Begin."},
+	}, gollm.Options{Model: "llama", Temperature: &temp, MaxTokens: &maxTok})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if text != "Once upon a time." {
+		t.Fatalf("got %q", text)
+	}
+	if gotBody["model"] != "llama" {
+		t.Fatalf("model %#v", gotBody["model"])
+	}
+	if gotBody["temperature"] != 0.2 {
+		t.Fatalf("temperature %#v", gotBody["temperature"])
+	}
+	if gotBody["max_tokens"] != float64(64) {
+		t.Fatalf("max_tokens %#v", gotBody["max_tokens"])
+	}
+	msgs, _ := gotBody["messages"].([]any)
+	if len(msgs) != 2 {
+		t.Fatalf("messages %#v", gotBody["messages"])
+	}
+}
+
+func TestStreamYieldsOpenAICompatibleChunks(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/chat/completions" {
+			t.Errorf("path %s", r.URL.Path)
+		}
+		var body map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+			t.Fatal(err)
+		}
+		if body["stream"] != true {
+			t.Fatalf("stream %#v", body["stream"])
+		}
+		w.Header().Set("Content-Type", "text/event-stream")
+		io.WriteString(w, "data: {\"choices\":[{\"delta\":{\"content\":\"Once\"}}]}\n\n")
+		io.WriteString(w, "data: {\"choices\":[{\"delta\":{\"content\":\" upon\"}}]}\n\n")
+		io.WriteString(w, "data: [DONE]\n\n")
+	}))
+	t.Cleanup(srv.Close)
+
+	client, err := gollm.NewClient(gollm.AdapterOpenAI, srv.URL, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	var chunks []string
+	err = client.Stream(context.Background(), []gollm.Message{
+		{Role: gollm.RoleUser, Content: "Begin."},
+	}, gollm.Options{Model: "llama"}, func(chunk string) error {
+		chunks = append(chunks, chunk)
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Join(chunks, "") != "Once upon" {
+		t.Fatalf("chunks %#v", chunks)
+	}
+}
+
+func TestListModelsReturnsOpenAICompatibleNames(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/models" || r.Method != http.MethodGet {
+			t.Errorf("got %s %s", r.Method, r.URL.Path)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		io.WriteString(w, `{"data":[{"id":"llama"},{"id":"mistral"}]}`)
+	}))
+	t.Cleanup(srv.Close)
+
+	client, err := gollm.NewClient(gollm.AdapterOpenAI, srv.URL, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	names, err := client.ListModels(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(names) != 2 || names[0] != "llama" || names[1] != "mistral" {
+		t.Fatalf("got %#v", names)
+	}
+}