PHP預言之謎

Question

我有$entity_type->isSubClassOf('Drupal\Core\Entity\FieldableEntityInterface')->willReturn(TRUE);和得到這個非常莫名其妙的錯誤：

Prophecy\Exception\Call\UnexpectedCallException: Method call: 
    - isSubclassOf("Drupal\Core\Entity\FieldableEntityInterface") 
on Double\EntityTypeInterface\P121 was not expected, expected calls were: 
    - isSubClassOf(exact("Drupal\Core\Entity\FieldableEntityInterface")) 

Answer 1

細心的讀者會觀察下情況c VS上情況c isSub後。我將問題發佈到https://github.com/phpspec/prophecy/issues/249