如何模拟来自 Faces Context 外部上下文的请求？

Question

我在 MainBacking.java 上有这样的代码：

public void init() {
    // Blah... 
    ExternalContext context = FacesContext.getCurrentInstance().getExternalContext(); // line 10
    HttpServletRequest request = (HttpServletRequest) context.getRequest(); // line 11
    // Blah...
}

我也制作了 FacesContextProvider class，这是我的 FacesContextProvider.java

public abstract class FacesContextProvider extends FacesContext {

    private FacesContextProvider() {
    }

    private static final Release RELEASE = new Release();

    private static class Release implements Answer<Void> {

        @Override
        public Void answer(InvocationOnMock invocation) throws Throwable {
            setCurrentInstance(null);
            return null;
        }
    }

    public static FacesContext getCurrentInstance() {
        FacesContext context = Mockito.mock(FacesContext.class);
        setCurrentInstance(context);
        Mockito.doAnswer(RELEASE).when(context).release();
        return context;
    }
    
}

这是我的 test.java

FacesContext mockFacesContext = FacesContextProvider.getCurrentInstance();
HttpServletRequest mockRequest = Mockito.mock(HttpServletRequest.class);
ExternalContext mockExternalContext = Mockito.mock(ExternalContext.class);

when(mockFacesContext.getExternalContext()).thenReturn(mockExternalContext);
when(mockExternalContext.getRequest()).thenReturn(mockRequest);

// Run Test
mainBackingUnderTest.init(); // has been declare at top using @InjectMocks

当我运行测试时，我在 MainBacking.java:11 上得到了错误 null 请帮助我。谢谢。

Answer 1

看着里面的this answer and the article linked，我无法重现NPE。这就是我测试它的方式：

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.http.*;

public class MainBacking {
    public void init() {
        // Blah...
        ExternalContext context = FacesContext.getCurrentInstance().getExternalContext(); // line 10
        HttpServletRequest request = (HttpServletRequest) context.getRequest(); // line 11
        // Blah...
    }
}

class MainBackingTest {

    MainBacking mainBackingUnderTest = new MainBacking();

    @Test
    void testInit() {
        // given
        FacesContext mockFacesContext = FacesContextProvider.getCurrentInstance();
        HttpServletRequest mockRequest = Mockito.mock(HttpServletRequest.class);
        ExternalContext mockExternalContext = Mockito.mock(ExternalContext.class);

        when(mockFacesContext.getExternalContext()).thenReturn(mockExternalContext);
        when(mockExternalContext.getRequest()).thenReturn(mockRequest);

        // when
        try {
            mainBackingUnderTest.init();
        } finally {
            mockFacesContext.release();
        }

        // then
        verify(mockFacesContext, times(1)).getExternalContext();
        verify(mockExternalContext, times(1)).getRequest();
    }
}

Answer 2

感谢您的所有回复，我已经通过阅读 this article. I didn't know whats wrong when I'm using FacesContextProvider I'm still got null error, but when I'm using Omnifaces 将模拟的 FacesContext 设置为我的测试用例中的当前实例解决了我的问题，空错误已解决。谢谢！

如何模拟来自 Faces Context 外部上下文的请求？

How to Mocking Request from Faces Context External Context?

java

jakarta-ee

junit

mockito