Spring mvc Spring SimpleFormController中的Java junit测试更改区域设置

对于SpringMVC，我有一个SimpleFormController，它有一个简单的方法，可以通过更改语言环境（i18n）来更改用户的语言

使用应用程序时，代码工作正常。但是，我想对这个方法进行Junit测试，到目前为止，我已经想到了以下几点：

public class LoginPostControllerTest extends TestCase {
public void testLocalize() throws Exception {

    MockHttpServletRequest mockRequest = new MockHttpServletRequest();
    MockHttpServletResponse mockResponse = new MockHttpServletResponse();

    Locale frenchLocale = Locale.CANADA_FRENCH;

    mockRequest.addPreferredLocale(frenchLocale);

    SessionLocaleResolver localeResolver = new SessionLocaleResolver();

    mockRequest.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE, localeResolver);

    String language = "zh_CN";

    LoginPostController loginPostControllerTest = new LoginPostController();

    loginPostControllerTest.localize(mockRequest, mockResponse, language);
    System.out.println(mockRequest.getLocale().toString());
}

}

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但它打印的是“fr_CA”而不是“zh_CN”。有人能提供更好的Junit测试策略吗？

您需要在测试中再次获得LocalResolver

LocaleResolver resolver = RequestContextUtils.getLocaleResolver(mockRequest);
System.out.println(mockRequest.getLocale().toString());
System.out.println(resolver.resolveLocale(mockRequest).toString());
assertTrue(!mockRequest.getLocale().equals(resolver.resolveLocale(mockRequest)));

LocaleResolver resolver = RequestContextUtils.getLocaleResolver(mockRequest);
System.out.println(mockRequest.getLocale().toString());
System.out.println(resolver.resolveLocale(mockRequest).toString());
assertTrue(!mockRequest.getLocale().equals(resolver.resolveLocale(mockRequest)));