Club Drupal

<?php

/**

 * Tests the simple MathExpressionStack class.

 */

class CtoolsMathExpressionStackTestCase extends DrupalWebTestCase {

  /**

   * {@inheritdoc}

   */

  public static function getInfo() {

    return array(

      'name' => 'Math expressions stack',

      'description' => 'Test the stack class of the math expression library.',

      'group' => 'ctools',

      'dependencies' => array('ctools'),

    );

  }

  /**

   * {@inheritdoc}

   */

  public function setUp(array $modules = array()) {

    $modules[] = 'ctools';

    $modules[] = 'ctools_plugin_test';

    parent::setUp($modules);

  }

  /**

   * Test the math expression stack system.

   */

  public function testStack() {

    $stack = new ctools_math_expr_stack();

    // Test the empty stack.

    $this->assertNull($stack->last());

    $this->assertNull($stack->pop());

    // Add an element and see whether it's the right element.

    $value = $this->randomName();

    $stack->push($value);

    $this->assertIdentical($value, $stack->last());

    $this->assertIdentical($value, $stack->pop());

    $this->assertNull($stack->pop());

    // Add multiple elements and see whether they are returned in the right

    // order.

    $values = array($this->randomName(), $this->randomName(), $this->randomName());

    foreach ($values as $value) {

      $stack->push($value);

    }

    // Test the different elements at different positions with the last()

    // method.

    $count = count($values);

    foreach ($values as $key => $value) {

      $this->assertEqual($value, $stack->last($count - $key));

    }

    // Pass in a non-valid number to last.

    $non_valid_number = rand(10, 20);

    $this->assertNull($stack->last($non_valid_number));

    // Test the order of the poping.

    $values = array_reverse($values);

    foreach ($values as $key => $value) {

      $this->assertEqual($stack->last(), $value);

      $this->assertEqual($stack->pop(), $value);

    }

    $this->assertNull($stack->pop());

  }

}