<?php
    // $Id: compatibility_test.php,v 1.3 2006/10/08 18:06:12 pp11 Exp $
    require_once(dirname(__FILE__) . '/../compatibility.php');
    
    class ComparisonClass {
    }
    
    class ComparisonSubclass extends ComparisonClass {
    }
    
    if (version_compare(phpversion(), '5') >= 0) {
        eval('interface ComparisonInterface { }');
        eval('class ComparisonClassWithInterface implements ComparisonInterface { }');
    }
    
    class TestOfCompatibility extends UnitTestCase {
        
        function testIsA() {
            $this->assertTrue(SimpleTestCompatibility::isA(
                    new ComparisonClass(),
                    'ComparisonClass'));
            $this->assertFalse(SimpleTestCompatibility::isA(
                    new ComparisonClass(),
                    'ComparisonSubclass'));
            $this->assertTrue(SimpleTestCompatibility::isA(
                    new ComparisonSubclass(),
                    'ComparisonClass'));
        }
        
        function testIdentityOfNumericStrings() {
            $numericString1 = "123";
            $numericString2 = "00123";
            $this->assertNotIdentical($numericString1, $numericString2);
        }
        
        function testIdentityOfObjects() {
            $object1 = new ComparisonClass();
            $object2 = new ComparisonClass();
            $this->assertIdentical($object1, $object2);
        }
        
        function testReferences () {
            $thing = "Hello";
            $thing_reference = &$thing;
            $thing_copy = $thing;
            $this->assertTrue(SimpleTestCompatibility::isReference(
                    $thing,
                    $thing));
            $this->assertTrue(SimpleTestCompatibility::isReference(
                    $thing,
                    $thing_reference));
            $this->assertFalse(SimpleTestCompatibility::isReference(
                    $thing,
                    $thing_copy));
        }
        
        function testObjectReferences () {
            $object = &new ComparisonClass();
            $object_reference = &$object;
            $object_copy = new ComparisonClass();
            $object_assignment = $object;
            $this->assertTrue(SimpleTestCompatibility::isReference(
                    $object,
                    $object));
            $this->assertTrue(SimpleTestCompatibility::isReference(
                    $object,
                    $object_reference));
            $this->assertFalse(SimpleTestCompatibility::isReference(
                    $object,
                    $object_copy));
            if (version_compare(phpversion(), '5', '>=')) {
                $this->assertTrue(SimpleTestCompatibility::isReference(
                        $object,
                        $object_assignment));
            } else {
                $this->assertFalse(SimpleTestCompatibility::isReference(
                        $object,
                        $object_assignment));
            }
        }
        
        function testInteraceComparison() {
            if (version_compare(phpversion(), '5', '<')) {
                return;
            }
            
            $object = new ComparisonClassWithInterface();
            $this->assertFalse(SimpleTestCompatibility::isA(
                    new ComparisonClass(),
                    'ComparisonInterface'));
            $this->assertTrue(SimpleTestCompatibility::isA(
                    new ComparisonClassWithInterface(),
                    'ComparisonInterface'));
        }
    }
?>