# Assert In
Asserts that the element identified by a given expression matches at least one item from a given list.
Parameters
| Name | Type | Required? | Description | Default value |
|---|---|---|---|---|
| Expression | Expression | Yes | Path to the element to be compared with the items in the list; for example payload.productId. |
|
| Value | String | Yes | The items that the specified element is to be compared with. Click anywhere in the field, enter the first item, then click the + icon to add further items. Alternatively, you can enter the items as a comma separated list. | |
| Type | Selection list | No | The data type of the value. If you do not specify a data type, the values are compared as strings. Select one of the following values:
|
|
| Mode | Selection list | No | Select one of the following values:
|
all |
| Level | Selection list | No | Select error or warning. Specifies whether, if the assertion fails, it should be considered an ‘error’ or just a ‘warning.’ A warning does not trigger alerts, such as email or text messages. | error |
| Modifier | Selection list | No | Select not to negate the assertion; the assertion is considered verified if it does not pass. | None |
| Execute if item exists | Selection list | No | Select true or false. If true, the assertion is evaluated only if the element exists. This is useful when the element does not always exist. | false |
| Stop test if fails | Selection list | No | Select true or false. If true, the test is immediately stopped if the assertion fails. | false |
| Assertion comment | String | No | An optional comment for information. |