#**Context:** This chunk provides ATF APIs for validation tasks related to catalog items and their variables within ServiceNow. The APIs support testing functionalities like validating the price and recurring prices of catalog items, ensuring that variable values comply with expected conditions, and checking the visible, read-only, and mandatory states of variables. These steps are crucial for comprehensive validation when catalog items or related forms are used within ServiceNow's application testing framework.
```typescript
// Step to validate price and recurring price of a Catalog Item after a call to atf.catalog.openCatalogItem. Can not be used with Record Producers
atf.catalog.validatePriceAndRecurringPrice({
    $id: Now.ID[''], // string | guid, mandatory
    price: '', // number | string
    recurringPrice: '', // number | string
    frequency: '', // '' | 'weekly' | 'quarterly' | 'weekly2' | 'semiannual' | 'monthly' | 'yearly' | 'daily' | 'monthly2';
}): void;

// Validates variable values on the Catalog Item, Record Producer pages or a page containing a variable editor. can be used only in-between atf.catalog.openCatalogItem step and atf.catalog.orderCatalogItem step
atf.catalog.validateVariableValue({
    $id: Now.ID[''], // string | guid, mandatory
    catalogItem: get_sys_id('sc_cat_item', ''), // sys_id | Record<'sc_cat_item'>
    catalogConditions: "IO:get_sys_id('item_option_new', '')=value" // string of variable sys_ids and the value to validate. If multiple, each has 'IO:' before and joined with ^, example: "IO:get_sys_id('item_option_new', '')=true^IO:get_sys_id('item_option_new', '')LIKEnone"
}): void;

// Validates states of the desired variables.
atf.catalog.variableStateValidation({ // each of the following props are mandatory
    $id: Now.ID[''], // string | guid, mandatory
    catalogItem: get_sys_id('sc_cat_item', ''), // sys_id | Record<'sc_cat_item'>
    visible: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
    notVisible: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
    readOnly: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
    notReadOnly: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
    mandatory: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
    notMandatory: [get_sys_id('item_option_new', '')], // array of sys_id | Record<'item_option_new'>
}): void;
```