spring - 如何在 Controller 单元测试中模拟Grails 4服务

Question

我不了解在Grails 4.0中模拟是如何工作的。
我有一个失败的单元测试(这只是真实测试的一个说明，真实测试实际上涉及 Controller ):

import com.myapp.MySearchService

class ApiControllerSpec extends Specification implements ControllerUnitTest<ApiController> {

    def setup() {
    }

    def cleanup() {
    }

    void "test listSources"() {
        given:
        def mock = Mock(MySearchService) {
            find(_) >> [["label": "abc", "description": "xsad"]]
        }

        when:
        System.out.println(mock.find(''))

        then:
        1 * mock.find(_) >> [["label": "abc", "description": "xsad"]]
    }

有错误

Too few invocations for:

1 * mock.find(_) >> [["label": "abc", "description": "xsad"]]   (0 invocations)

Unmatched invocations (ordered by similarity):

1 * mock.invokeMethod('find', [<java.lang.String@0 value= hash=0>])


    at org.spockframework.mock.runtime.InteractionScope.verifyInteractions(InteractionScope.java:93)
    at org.spockframework.mock.runtime.MockController.leaveScope(MockController.java:77)
    at toe.ApiControllerSpec.test listSources(ApiControllerSpec.groovy:29)

和标准输出

null

有趣的是，如果我使用非常简单的测试类而不是MySearchService，则此方法很好用。因此，我假设它必须与Grails / Spring的设置方式有关。这也可以解释以下几行:

Unmatched invocations (ordered by similarity):

1 * mock.invokeMethod('find', [<java.lang.String@0 value= hash=0>])

但是我如何设置它呢？我在文档的任何地方都找不到。谢谢你的帮助!

类似问题(无答案):
How to partially mock service in Grails integration test

Answer 1

模拟的语法不正确-这是在Grails 4.0.1中测试的工作示例

    void "test something"() {
        given:
        def mock = Mock(SearchService) {
            1 * find(_) >> ['foobar'] // note the interaction count is required when defining this way.
        }

        when:
        def result = mock.find('')

        then:
        result == ['foobar']
    }

参见- http://spockframework.org/spock/docs/1.0/interaction_based_testing.html-部分: Declaring Interactions at Mock Creation Time
请注意，Grails文档中可能没有此功能，因为没有任何Grails特定于此-仅Spock。