# Yahoo! UI Library

### test 3.0.0b1

Yahoo! UI Library > test > Assert.Error
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## Class Assert.Error

Known Subclasses:
  Assert.ShouldError Assert.UnexpectedError Assert.UnexpectedValue Assert.ShouldFail Assert.ComparisonFailure

Error is thrown whenever an assertion fails. It provides methods to more easily get at error information and also provides a base class from which more specific assertion errors can be derived.

### Constructor

Assert.Error `( message )`

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

### Properties

#### name - `String`

The name of the error that occurred.

### Methods

#### getMessage

`String getMessage ( )`
Returns a fully formatted error for an assertion failure. This should be overridden by all subclasses to provide specific information.

Returns: `String`
  A string describing the error.

#### toString

`String toString ( )`
Returns a string representation of the error.

Returns: `String`
  A string representation of the error.

#### valueOf

`String valueOf ( )`
Returns a primitive value version of the error. Same as toString().

Returns: `String`
  A primitive value version of the error.

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