# Class goog.labs.testing.IsNullMatcher

code »

All implemented interfaces:
  `goog.labs.testing.Matcher`

The IsNull matcher.

## Constructor

goog.labs.testing.IsNullMatcher ( )
Show:Public Protected Private

## Instance Methods

code »describe ( actualValue ) ⇒ `string`

Parameters
actualValue

code »matches ( actualValue ) ⇒ `boolean`

Determines if input value is null.

Parameters
actualValue