package onspring_test import ( "errors" "net/http" "net/http/httptest" "testing" "github.com/StevanFreeborn/onspring-api-sdk-go" ) func setupMockServer(t *testing.T, handler http.HandlerFunc) (*httptest.Server, *onspring.Client) { t.Helper() server := httptest.NewServer(handler) t.Cleanup(func() { server.Close() }) client := onspring.NewClient( "test-key", onspring.WithBaseURL(server.URL), onspring.WithHTTPClient(server.Client()), ) return server, client } type ErrorTransport struct{} func (t *ErrorTransport) RoundTrip(req *http.Request) (*http.Response, error) { return nil, errors.New("simulated network connection failure") }