private void stubAcquireReturnsSelf() {
        when(tree.acquire()).thenReturn(tree);
    }

    @Test
    @DisplayName("Getters return constructor values and acquire is called")
    void gettersAndAcquire() throws Exception {
        // Arrange
        stubAcquireReturnsSelf();
        String wildcard = "*.*";
        int attrs = 123;
        FileEntry initial = entry("first");