math_expression_stack.test

<?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());
    }

}