<?php
namespace Hamcrest\Text;

/*
 Copyright (c) 2009 hamcrest.org
 */
use Hamcrest\BaseMatcher;
use Hamcrest\Core\AnyOf;
use Hamcrest\Core\IsNull;
use Hamcrest\Description;

/**
 * Matches empty Strings (and null).
 */
class IsEmptyString extends BaseMatcher
{

    private static $_INSTANCE;
    private static $_NULL_OR_EMPTY_INSTANCE;
    private static $_NOT_INSTANCE;

    private $_empty;

    public function __construct($empty = true)
    {
        $this->_empty = $empty;
    }

    public function matches($item)
    {
        return $this->_empty
            ? ($item === '')
            : is_string($item) && $item !== '';
    }

    public function describeTo(Description $description)
    {
        $description->appendText($this->_empty ? 'an empty string' : 'a non-empty string');
    }

    /**
     * Matches if value is a zero-length string.
     *
     * @factory emptyString
     */
    public static function isEmptyString()
    {
        if (!self::$_INSTANCE) {
            self::$_INSTANCE = new self(true);
        }

        return self::$_INSTANCE;
    }

    /**
     * Matches if value is null or a zero-length string.
     *
     * @factory nullOrEmptyString
     */
    public static function isEmptyOrNullString()
    {
        if (!self::$_NULL_OR_EMPTY_INSTANCE) {
            self::$_NULL_OR_EMPTY_INSTANCE = AnyOf::anyOf(
                IsNull::nullvalue(),
                self::isEmptyString()
            );
        }

        return self::$_NULL_OR_EMPTY_INSTANCE;
    }

    /**
     * Matches if value is a non-zero-length string.
     *
     * @factory nonEmptyString
     */
    public static function isNonEmptyString()
    {
        if (!self::$_NOT_INSTANCE) {
            self::$_NOT_INSTANCE = new self(false);
        }

        return self::$_NOT_INSTANCE;
    }
}

• [F] IsEmptyString.php
  Delete
• [F] IsEqualIgnoringCase.php
  Delete
• [F] IsEqualIgnoringWhiteSpace.php
  Delete
• [F] MatchesPattern.php
  Delete
• [F] StringContains.php
  Delete
• [F] StringContainsIgnoringCase.php
  Delete
• [F] StringContainsInOrder.php
  Delete
• [F] StringEndsWith.php
  Delete
• [F] StringStartsWith.php
  Delete
• [F] SubstringMatcher.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024