public function test_srcNotExists()
 {
     /** === Test Data === */
     $src = 'file_is_not_exists';
     $vars = ['var1' => '21'];
     $tmpl = new Template();
     $tmpl->setSource($src);
     /** === Setup Mocks === */
     $expected = self::CLAZZ . ": <error>Cannot open source template ({$src}).</error>";
     $this->mIo->shouldReceive('writeError')->once()->with($expected);
     /** === Call and asserts  === */
     $proc = new Handler($vars, $this->mIo);
     $proc->process($tmpl);
 }