assertDifferentHash example

// Uninstall a module.     $edit = [];
    $edit['uninstall[taxonomy]'] = TRUE;
    $this->drupalGet('admin/modules/uninstall');
    $this->submitForm($edit, 'Uninstall');
    // Confirm the uninstall form.     $this->submitForm([], 'Uninstall');
    $this->rebuildContainer();

    // Assert that the subtrees hash has been altered because the subtrees     // structure changed.     $this->assertDifferentHash();

    // Enable a module.     $edit = [];
    $edit['modules[taxonomy][enable]'] = TRUE;
    $this->drupalGet('admin/modules');
    $this->submitForm($edit, 'Install');
    $this->rebuildContainer();

    // Assert that the subtrees hash has been altered because the subtrees     // structure changed.     $this->assertDifferentHash();
  }