# Yahoo! UI Library

### test 3.1.1

Yahoo! UI Library > test > Assert.ShouldError
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## Class Assert.ShouldError - extends Assert.Error

ShouldError is subclass of Error that is thrown whenever a test is expected to throw an error but doesn't.

### Constructor

Assert.ShouldError `( message )`

Parameters:
  `message <String>` The message to display when the error occurs.

### Properties

#### name - `String`

The name of the error that occurred.

#### Properties inherited from Assert.Error:

`name`

#### Methods inherited from Assert.Error:

`getMessage, toString, valueOf`

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