unit-testing - 测试 grails 数据绑定(bind)

Question

我编写了以下 Grails Controller

class CategoryController {

    def create = {
        def newCategory = new CategoryCommand()
        bindData(newCategory, params)
        [newCategory: newCategory]
    }
}

class CategoryCommand {

    String name
    String seoName
}

我编写了这个单元测试来测试数据绑定(bind):

class CategoryControllerTests extends ControllerUnitTestCase {


    void testCreate() {

        // A new ControllerCommand should be returned if invoked with no params
        assertNotNull controller.create()

        // If called with params, they should be bound
        mockParams.name = 'snooker'
        mockParams.seoName = 'snooker-loopy'
        def model = controller.create()

        CategoryCommand newCategory = model.newCategory
        assertEquals 'snooker', newCategory.name
        assertEquals 'snooker-loopy', newCategory.seoName

    }
}

但是当 controller.create() 时出现此异常被调用:

No signature of method: com.example.CategoryController.bindData() is applicable for argument types: (com.example.CategoryCommand, org.codehaus.groovy.grails.web.taglib.GroovyPageAttributes) values: [com.example.CategoryCommand@7860e7d2, [:]]

我尝试将其作为集成测试运行，但结果是相同的。

Answer 1

对...我挖了一下，发现this blog page它说(大约一半):

note:ControllerUnitTestCase not support some dynamic method. For instance: bindData(). Then is better use integration testing, or you can add this method to controller:

this.controller.metaClass.bindData = { obj, params ->  
  params.each { key, value ->  
    obj."$key" = value  
  }  
}  

或者，我查看了 Grails source code ，并模拟它做同样的事情 as what Grails does ，我认为你需要这样做:

import org.codehaus.groovy.grails.web.metaclass.BindDynamicMethod

this.controller.metaClass.bindData = { obj, params ->
  new BindDynamicMethod().invoke( delegate, BindDynamicMethod.BIND_DATA_METHOD, [ obj, params ] as Object[] ) ;
}

(我认为 - 没有测试过)