function testIsPackageClassAvailable()
 {
     $coverageSource = dirname(__FILE__) . '/../coverage_calculator.php';
     $this->assertTrue(CoverageUtils::isPackageClassAvailable($coverageSource, 'CoverageCalculator'));
     $this->assertFalse(CoverageUtils::isPackageClassAvailable($coverageSource, 'BogusCoverage'));
     $this->assertFalse(CoverageUtils::isPackageClassAvailable('bogus-file', 'BogusCoverage'));
     $this->assertTrue(CoverageUtils::isPackageClassAvailable('bogus-file', 'CoverageUtils'));
 }