Question

我想通过读取我拥有的json文件进行单元测试，该文件与API返回的方案相同。但是我承认我丝毫不知道如何开始。

场景如下：当应用程序通过ViewModel的观察者加载片段时，将对API进行改造。我在“ test / res /”的.json文件中拥有该调用响应的JSON，在我的第一个测试中，我只想测试“ code”参数的返回值是否等于200

服务界面

@GET("characters")
    fun getCharacters(@Query("ts") ts: String,
                      @Query("apikey") apiKey: String,
                      @Query("hash") hash: String,
                      @Query("limit") limit : String = "80"): Call<ReturnData>

型号

data class ReturnData(
    val attributionHTML: String,
    val attributionText: String,
    val code: Int,
    val copyright: String,
    val `data`: Data,
    val etag: String,
    val status: String
)

class HomeViewModel(private val repository: MarvelRepository = MarvelRepositoryImpl(),
                    private val fragment: HomeFragment = HomeFragment.newInstance())
    : ViewModel() {

fun getHeroes(){
        //fragment.showLoading()
        repository.getCharacter(object : OnGetMarvelCallback{

            override fun onSuccess(response: ReturnData) {
                Log.d("Reponse", "It's Ok!!!")
                heroesList.value = response
                //fragment.hideLoading()
            }

            override fun onError() {
                Log.e("ErrorViewModel", "Error in viewmodel call")
                //fragment.hideLoading()
            }
        })
    }
}

class HomeViewModelTest {
    @get:Rule
    var rule: TestRule = InstantTaskExecutorRule()

    @Before
    fun setUp() {
        MockitoAnnotations.initMocks(this)

    }

@Test
    @Throws(Exception::class)
    fun fileObjectShouldNotBeNull() {
        //val file = getFileFromPath(this, "mock_response_error_404.json")
        val file = readFileFromJson( "mock_response_error_404")
        assertThat(file, notNullValue())
    }

fun readFileFromJson(fileName: String): String{
        val br = BufferedReader(InputStreamReader(FileInputStream(fileName)))
        val sb = StringBuilder()

        var line = br.readLine()

        while (line != null){
            sb.append(line)
            line = br.readLine()
        }

        return sb.toString()
    }

private fun getFileFromPath(obj: Any, fileName: String): File {
        val classLoader = obj.javaClass.classLoader
        val resource = classLoader!!.getResource(fileName)
        return File(resource.path)
    }

}

除了这些类外，还具有负责执行对MarvelAPI服务的调用的存储库。运行这些测试会给我带来以下异常：java.io.FileNotFoundException：mock_response_error_404（没有此类文件或目录）。

在单元测试中模拟Json响应

0 个答案: