public static function mock($function, $returnValue)
 {
     if (CIPHPUnitTestFunctionPatcher::isBlacklisted($function)) {
         throw new LogicException('Can\'t patch on ' . $function);
     }
     self::$mocks[$function] = $returnValue;
 }
 public function leaveNode(PhpParser\Node $node)
 {
     if (!$node instanceof FuncCall) {
         return;
     }
     if (!$node->name instanceof Name) {
         return;
     }
     if ($node->name->isUnqualified() && !CIPHPUnitTestFunctionPatcher::isBlacklisted((string) $node->name)) {
         $replacement = new FullyQualified(array());
         $replacement->set('CIPHPUnitTestFunctionPatcherProxy::' . (string) $node->name);
         $pos = $node->getAttribute('startTokenPos');
         CIPHPUnitTestFunctionPatcher::$replacement[$pos] = '\\CIPHPUnitTestFunctionPatcherProxy::' . (string) $node->name;
         $node->name = $replacement;
     }
 }