使用@ContextConfiguration在Junit中模拟Spring环境对象

Question

I have got a test like this

RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { AppConfig.class, TestConfig.class})
public class MyTest {
 ........
}

The AppConfig is the main config for my app, the TestConfig is the test config which loads the test properties

  @Configuration
  @PropertySource("classpath:test_dev.properties")
    public class DevConfig {
  @Bean
  public DataSource getDataDataSource() {
    BasicDataSource dataSource = new BasicDataSource();

    dataSource.setDriverClassName(env.getProperty("driverclass"));
    dataSource.setUrl(env.getProperty("url"));
    dataSource.setUsername(env.getProperty("username"));
    dataSource.setPassword(env.getProperty("password"));
    return dataSource;
  }

}

problem is The test_dev.properties file has a encrypted password field driverclass = ojdbc:xxx

 url = xxxxxx
 username = abc
 password = #'"@~£$%

I need to use decryptor to decrypt it, then the decrypted password on the env object. thus env.get("password"), the real password will return

so my question is how can I mock the Environment object before the DataSource object gets crated.

Answer 1

in my case, I wanted to mock the password filed on the datasource object

I first let the datasource bean initialize, then in my integration test autowired the mybatis Environment (don't be confused with springs environment).

from the env you can get the datasource.

from the @beforetest section, the trick is to use Reflectiontestutils.setfield to set the password field on the datasource

alternatively you could inject the entire datasource on the target environment but I didn't try

the key motivation for using Spring is to easily inject mock objects.