tests(llm): add OpenAI and Copilot HTTP tests (success + token/error paths); llm coverage ~61%

1 files changed, 27 insertions, 0 deletions

diff --git a/internal/llm/openai_http_test.go b/internal/llm/openai_http_test.go
new file mode 100644
index 0000000..4989067
--- /dev/null
+++ b/internal/llm/openai_http_test.go
@@ -0,0 +1,27 @@
+package llm
+
+import (
+    "context"
+    "encoding/json"
+    "net/http"
+    "net/http/httptest"
+    "testing"
+)
+
+func TestOpenAI_Chat_Success(t *testing.T) {
+    srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+        if r.URL.Path != "/chat/completions" { t.Fatalf("unexpected path: %s", r.URL.Path) }
+        _ = json.NewEncoder(w).Encode(map[string]any{"choices": []map[string]any{{"index":0, "message": map[string]string{"role":"assistant","content":"OK"}}}})
+    }))
+    defer srv.Close()
+    c := newOpenAI(srv.URL, "g", "KEY", f64p(0.2)).(openAIClient)
+    c.httpClient = srv.Client()
+    out, err := c.Chat(context.Background(), []Message{{Role:"user", Content:"hi"}})
+    if err != nil || out != "OK" { t.Fatalf("openai chat: %v %q", err, out) }
+}
+
+func TestOpenAI_Chat_MissingKey(t *testing.T) {
+    c := newOpenAI("http://x", "g", "", f64p(0.2)).(openAIClient)
+    if _, err := c.Chat(context.Background(), []Message{{Role:"user", Content:"hi"}}); err == nil { t.Fatalf("expected error for missing key") }
+}
+