negative-zero

Validates if a value is negative zero.

Installation

1$ npm install validate.io-negative-zero

For use in the browser, use browserify.

Usage

1var isNegativeZero = require( 'validate.io-negative-zero' );

isNegativeZero( value )

Validates if a value is negative zero.

1var value = -0;
2
3var bool = isNegativeZero( value );
4// returns true

Examples

1var isNegativeZero = require( 'validate.io-negative-zero' );
2
3console.log( isNegativeZero( -0 ) );
4// returns true
5
6console.log( isNegativeZero( 0 ) );
7// returns false
8
9console.log( isNegativeZero( '' ) );
10// returns false
11
12console.log( isNegativeZero( null ) );
13// returns false

To run the example code from the top-level application directory,

1$ node ./examples/index.js

Tests

Unit

Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:

1$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

1$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

1$ make view-cov

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License

MIT license.

Copyright

Copyright © 2015. Athan Reines.