Node.js assert.notStrictEqual() Method

Example

If two values are equal (both in value and type), an error is thrown and the program is terminated:

var assert = require('assert');
assert.notStrictEqual(50, 70); //OK
assert.notStrictEqual(50, "50"); //OK
assert.notStrictEqual(50, 50); /*AssertionError: 50 != 50 */

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Definition and Usage

The assert.notStrictEqual() method tests if two values are NOT equal, using the !== operator.

If the two values are equal, an assertion failure is being caused, and the program is terminated.

The !== operator tests if the values and the types are equal.

To compare the values using the != operator, use the assert.notEqual() method.

Syntax

assert.notStrictEqual(value1, value2, message);

Parameter Values

Parameter	Description
value1	Required. Specifies the first value to be compared
value2	Required. Specifies the second value to be compared
message	Optional. Specifies the error message to be assigned to the AssertionError. If omitted, a default message is assigned

Technical Details

Return Value:	None
Node.js Version:	0.1.21

More Examples

Example

Using the message parameter:

var assert = require('assert');
assert.notStrictEqual(50, 50, "My message goes here");

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❮ Assert Module