PHPUnit Class not found even though it is defined - php

Question

I'm trying to unit-test my class-function using PHPUnit, but I keep running into Class not found error, even though it is present.
Here's my func.php where the class is defined:
<?php
class func {
public function url($var) {
//do something
return myvalue;
}
?>
And here's funcCase.php where the Test class is defined:
<?php
require 'func.php';
require 'PHPUnit.php';
class funcTest extends PHPUnit_TestCase {
// contains the object handle of the string class
var $box;
// constructor of the test suite
function funcTest($name) {
$this->PHPUnit_TestCase($name);
}
// called before the test functions will be executed
// this function is defined in PHPUnit_TestCase and overwritten
// here
function setUp() {
// create a new instance of String with the
// string 'abc'
$this->box = new func();
}
// called after the test functions are executed
// this function is defined in PHPUnit_TestCase and overwritten
// here
function tearDown() {
// delete your instance
unset($this->box);
}
// test the url
function testurl() {
$result = $this->box->url('myvalue');
$expected = 'myvalue';
echo $result;
$this->assertTrue($result == $expected);
}
}
?>
And the funcTest.php which runs the PHPTestSuite:
<?php
require_once 'funcCase.php';
require_once 'PHPUnit.php';
$suite = new PHPUnit_TestSuite("funcTest");
$result = PHPUnit::run($suite);
echo $result -> toString();
?>
When running the funcTest.php using phpunit funcTest.php I get this error:
TestCase funcTest->testurl() failed: expected TRUE, actual FALSE
Class 'funcTest' could not be found in 'C:\xampp\htdocs\funcTest.php'.
Why am I getting this if the funcTest class is defined and funcCase.php is included in funcTest.php?