Function
assert
Common
```kotlin
fun SemanticsNodeInteraction.assert(
matcher: SemanticsMatcher,
messagePrefixOnError: (() -> String)? = null,
): SemanticsNodeInteraction
```
Asserts that the provided `matcher` is satisfied for this node.
#### Parameters
| | |
| --- | --- |
| matcher | Matcher to verify. |
| messagePrefixOnError | Prefix to be put in front of an error that gets thrown in case this assert fails. This can be helpful in situations where this assert fails as part of a bigger operation that used this assert as a precondition check. |