public function testIssetArray()
{
$t = new \Test\IssetTest();
$testArray = array('a', 'abc' => 'def', 'gef' => '123');
$this->assertTrue($t->testIssetArray1($testArray, 'abc'));
$this->assertTrue(!$t->testIssetArray2($testArray, 12));
$this->assertTrue($t->testIssetArray3($testArray, 'gef'));
$this->assertTrue($t->testIssetArray4($testArray));
$this->assertTrue(!$t->testIssetArray5($testArray));
}