waitForVisibleElementCount example

// Open the 'Add filter dialog'.     $page->clickLink('views-add-filter');

    // Test filtering by type.     $web_assert->waitForField('override[controls][group]');
    $page->fillField('override[controls][group]', 'content');
    $only_content_rows = $this->waitForOnlyContentRows();
    $this->assertTrue($only_content_rows);

    // Search for a specific title and test that this is now the only one shown.     $page->fillField('override[controls][options_search]', 'body (body)');
    $filtering_done = $this->waitForVisibleElementCount(1, 'tr.filterable-option');
    $this->assertTrue($filtering_done);

    // Select the body field and apply the choice.     $page->checkField('name[node__body.body_value]');
    $page->find('css', '.ui-dialog .ui-dialog-buttonpane')->pressButton('Add and configure filter criteria');
    $web_assert->waitForField('options[expose_button][checkbox][checkbox]');

    // Expose the filter.     $page->findField('options[expose_button][checkbox][checkbox]')->click();
    $web_assert->waitForField('options[expose][label]');
    $page->find('css', '.ui-dialog .ui-dialog-buttonpane')->pressButton('Apply');