Instantiating a class without constructor and with @Value annotation for Junit

I want to make a Bean in context of my Junit code of a spring web application. Here is the class in the project that i want to instantiate.
This has no constructor and also uses @Value annotation. How to do it.

public class AppEnvironment {

    private String appId;
    private String appSecret;
    private boolean isProd;
    private String baseUrl;
    private String botGUID;
    private String botToken;
    private String appIconUrl;
    private String fontColor;
    private String reminderBotHost;

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Rohit BajajAsked:
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There are several approaches:

1) Mock the class (using Mockito/JMock/any other mocking framework)
2) Run it with SpringJUnit4ClassRunner and use a @TestPropertySource
3) Change the access to package and set the values manually.

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