@Test
public void testGetOperatorCompletions() {

    when(plugin.getFactType()).thenReturn("factType");
    when(plugin.getFactField()).thenReturn("factField");
    when(presenter.getDataModelOracle()).thenReturn(oracle);
    page.getOperatorCompletions(s -> {
    });
    verify(oracle).getOperatorCompletions(eq("factType"),
                                          eq("factField"),
                                          any());
}