StepVerifier

```
public interface StepVerifier
```
Provides the ability to verify expectations on asynchronous sources.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.time.Duration`	`verify()`	Verify the none of the previously declared expectations are violated.
`java.time.Duration`	`verify(java.time.Duration duration)`	Verify the none of the previously declared expectations are violated.

- Method Detail
  - verify
```
java.time.Duration verify()
                   throws java.lang.AssertionError
```
    Verify the none of the previously declared expectations are violated.
    This method will trigger a subscribe on the asynchronous source.
    
    Returns:
    
    The amount of time the declared expectations took to complete.
    
    Throws:
    
    java.lang.AssertionError - if any of the declared expectations fail.
  - verify
```
java.time.Duration verify(java.time.Duration duration)
                   throws java.lang.AssertionError
```
    Verify the none of the previously declared expectations are violated.
    This method will trigger a subscribe on the asynchronous source.
    
    Parameters:
    
    duration - The amount of time to wait while executing declared expectations.
    
    Returns:
    
    The amount of time the declared expectations took to complete.
    
    Throws:
    
    java.lang.AssertionError - if any of the declared expectations fail, or if the duration expires.