ResettableStaticTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Bootstrap;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests that drupal_static() and drupal_static_reset() work.
 *
 * @group Bootstrap
 */
class ResettableStaticTest extends KernelTestBase {
    
    /**
     * Tests drupal_static() function.
     *
     * Tests that a variable reference returned by drupal_static() gets reset when
     * drupal_static_reset() is called.
     */
    public function testDrupalStatic() : void {
        $name = __CLASS__ . '_' . __METHOD__;
        $var =& drupal_static($name, 'foo');
        $this->assertEquals('foo', $var, 'Variable returned by drupal_static() was set to its default.');
        // Call the specific reset and the global reset each twice to ensure that
        // multiple resets can be issued without odd side effects.
        $var = 'bar';
        drupal_static_reset($name);
        $this->assertEquals('foo', $var, 'Variable was reset after first invocation of name-specific reset.');
        $var = 'bar';
        drupal_static_reset($name);
        $this->assertEquals('foo', $var, 'Variable was reset after second invocation of name-specific reset.');
        $var = 'bar';
        drupal_static_reset();
        $this->assertEquals('foo', $var, 'Variable was reset after first invocation of global reset.');
        $var = 'bar';
        drupal_static_reset();
        $this->assertEquals('foo', $var, 'Variable was reset after second invocation of global reset.');
        // Test calling drupal_static() with no arguments (empty string).
        $name1 = __CLASS__ . '_' . __METHOD__ . '1';
        $name2 = '';
        $var1 =& drupal_static($name1, 'initial1');
        $var2 =& drupal_static($name2, 'initial2');
        $this->assertEquals('initial1', $var1, 'Variable 1 returned by drupal_static() was set to its default.');
        $this->assertEquals('initial2', $var2, 'Variable 2 returned by drupal_static() was set to its default.');
        $var1 = 'modified1';
        $var2 = 'modified2';
        drupal_static_reset($name1);
        drupal_static_reset($name2);
        $this->assertEquals('initial1', $var1, 'Variable 1 was reset after invocation of name-specific reset.');
        $this->assertEquals('initial2', $var2, 'Variable 2 was reset after invocation of name-specific reset.');
        $var1 = 'modified1';
        $var2 = 'modified2';
        drupal_static_reset();
        $this->assertEquals('initial1', $var1, 'Variable 1 was reset after invocation of global reset.');
        $this->assertEquals('initial2', $var2, 'Variable 2 was reset after invocation of global reset.');
    }

}