Cut over public engine construction to ConfigKit sources

transient_retries_contract_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 
 	"gitea.maximumdirect.net/eric/promptkit"
+	"gitea.maximumdirect.net/eric/promptkit/testfixture"
 )
 
 func retryHTTPResponse(status int, content string) *http.Response {
@@ -30,7 +31,7 @@ func retryTestEngine(t *testing.T, budget *int, next func(int) *http.Response) (
 		calls++
 		return next(calls), nil
 	})}
-	engine, err := promptkit.NewEngine(config)
+	engine, err := testfixture.NewEngine(config)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -71,7 +72,7 @@ func TestRetryValidationAndPreparedFreezing(t *testing.T) {
 	negative := -1
 	config := contractConfig(frameworkSchemaDir)
 	config.TransientRetries = &negative
-	if _, err := promptkit.NewEngine(config); !errors.Is(err, promptkit.ErrInvalidConfig) {
+	if _, err := testfixture.NewEngine(config); !errors.Is(err, promptkit.ErrInvalidConfig) {
 		t.Fatalf("negative engine budget = %v", err)
 	}