assertTrue(s.startsWith("KERB5["));
        assertTrue(s.contains("src=null"));
    }

    @Test
    @DisplayName("toString shows names and mech when established")
    void toString_established_ok() throws Exception {
        when(gssContext.isEstablished()).thenReturn(true);
        GSSName src = mock(GSSName.class);
        GSSName targ = mock(GSSName.class);
        when(src.toString()).thenReturn("client");