使用PHPUnit模擬對象測試模板方法設計模式實現

Question

假設我有模板方法設計模式實現的代碼。我想在我的模板方法中測試方法調用的順序和計數。我嘗試使用PHPUnit模擬。我的源代碼如下所示：

class Foo { 

    public function __construct() {} 

    public function foobar() { 
     $this->foo(); 
     $this->bar(); 
    } 

    protected function foo() {} 

    protected function bar() {} 
} 


class FooTest extends PHPUnit_Framework_TestCase { 

    public function testFoo() { 
     $fooMock = $this->getMock('Foo', array('foo', 'bar')); 

     $fooMock->foobar(); 

     $fooMock->expects($this->once())->method('foo'); 
     $fooMock->expects($this->once())->method('bar'); 
    } 
} 

因此，我有這樣的錯誤：

PHPUnit_Framework_ExpectationFailedException : 
Expectation failed for method name is equal to <string:foo> when invoked 1 time(s). 
Method was expected to be called 1 times, actually called 0 times. 

是否可以算使用模擬對象在這樣的情況方法調用？

Answer 1

這只是我愚蠢的錯誤。錯誤的模擬對象創建序列：

// ... 

public function testFoo() { 
    $fooMock = $this->getMock('Foo', array('foo', 'bar')); 
    $fooMock->expects($this->once())->method('foo'); // (!) immediately after   
    $fooMock->expects($this->once())->method('bar'); // mock object instantiation 

    $fooMock->foobar(); 
}