MockMVC如何在同一测试用例中测试异常和响应代码 [英] MockMVC how to test exception and response code in the same test case

问题描述

我想断言引发了异常，并且服务器返回了500个内部服务器错误.

I want to assert that an exception is raised and that the server returns an 500 internal server error.

要突出显示意图，提供了一个代码段:

To highlight the intent a code snippet is provided:

thrown.expect(NestedServletException.class);
this.mockMvc.perform(post("/account")
            .contentType(MediaType.APPLICATION_JSON)
            .content(requestString))
            .andExpect(status().isInternalServerError());

当然我写isInternalServerError或isOk都没关系. 不管是否在throw.except语句下面引发异常，测试都会通过.

Of course it dosen't matter if I write isInternalServerError or isOk. The test will pass regardless if an exception is thrown below the throw.except statement.

您将如何解决这个问题?

How would you go about to solve this?

推荐答案

您可以尝试以下操作-

1. 创建自定义匹配器

1. Create a custom matcher

public class CustomExceptionMatcher extends
TypeSafeMatcher<CustomException> {

private String actual;
private String expected;

private CustomExceptionMatcher (String expected) {
    this.expected = expected;
}

public static CustomExceptionMatcher assertSomeThing(String expected) {
    return new CustomExceptionMatcher (expected);
}

@Override
protected boolean matchesSafely(CustomException exception) {
    actual = exception.getSomeInformation();
    return actual.equals(expected);
}

@Override
public void describeTo(Description desc) {
    desc.appendText("Actual =").appendValue(actual)
        .appendText(" Expected =").appendValue(
                expected);

}
}

在JUnit类中声明一个@Rule，如下所示-

Declare a @Rule in JUnit class as below -

@Rule
public ExpectedException exception = ExpectedException.none();

在测试用例中将自定义匹配器用作-

Use the Custom matcher in test case as -

exception.expect(CustomException.class);
exception.expect(CustomException
        .assertSomeThing("Some assertion text"));
this.mockMvc.perform(post("/account")
    .contentType(MediaType.APPLICATION_JSON)
    .content(requestString))
    .andExpect(status().isInternalServerError());

附言::我提供了通用伪代码，您可以根据自己的要求进行自定义.

P.S.: I have provided a generic pseudo code which you can customize as per your requirement.

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