[英]Mocking extended java classes in groovy
如何在groovy測試中模擬由groovy(輸入/輸出流)擴展的Java類? 我嘗試了模仿和時髦的模擬,但是沒有運氣。 有什么辦法可以工作嗎? 任何可以處理這種情況的java / groovy庫?
下面有一個groovy servlet,它在InputStream上使用groovy getText方法,在OutputStream上使用setBytes。 如何在Groovy測試中模擬(1)getText和驗證(2)setBytes?
感謝幫助,
米哈爾
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse
@groovy.transform.TypeChecked
class SomeServlet extends javax.servlet.http.HttpServlet {
@Override
protected void doPost(final HttpServletRequest request, final HttpServletResponse response) {
final String charset = request.getCharacterEncoding();
final String requestPayload = request.getInputStream().getText(charset); // GROOVY getText
response.setContentType(request.getContentType());
response.setStatus(200);
response.setCharacterEncoding(charset);
response.getOutputStream().setBytes(requestPayload.getBytes(charset)) // GROOVY setBytes
}
}
class SomeServletTest {
@org.testng.annotations.Test
void aTest() {
// given
HttpServletRequest request = mock(HttpServletRequest)
when(request.getCharacterEncoding()).thenReturn("UTF-8")
when(request.getInputStream().getText("UTF-8")).thenReturn("some text") // (1)
HttpServletResponse response = mock(HttpServletResponse)
def ss = new SomeServlet()
// when
ss.doPost(request, request)
// then
verify(response.getOutputStream()).setBytes("some text") // (2)
}
}
我建議您使用HttpServletRequest和HttpServletResponse的現成的模擬程序,而不要自己模擬類。 模擬Servlet API類非常困難,並且在現實世界中會證明成本太高。
Spring Framework具備以下全部功能: http : //docs.spring.io/spring-framework/docs/3.2.x/javadoc-api/org/springframework/mock/web/package-summary.html
使用MockHttpServletRequest和MockHttpServletResponse類,單元測試將非常簡單且可讀:
import org.springframework.mock.web.MockHttpServletRequest
import org.springframework.mock.web.MockHttpServletResponse
import org.testng.Assert
import org.testng.annotations.Test
class SomeServletTest {
@Test
void aTest() {
def request = new MockHttpServletRequest(
characterEncoding: "UTF-8",
content: "some text".bytes)
def response = new MockHttpServletResponse()
def ss = new SomeServlet()
ss.doPost(request, response)
Assert.assertEquals(response.getContentAsString(), "some text")
}
}
即使您不想使用Spring Framework構建整個應用程序,仍然可以從其出色的單元測試支持中受益。
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