与Testcontainers Dropwizard集成测试

Question

我试图对dockered数据库运行dropwizard的集成测试。

• Dropwizard
• Testcontainers

我已经试过：

@ClassRule 
public static final PostgreSQLContainer postgres = new PostgreSQLContainer(); 

@ClassRule 
    public final DropwizardAppRule<Configuration> RULE = new DropwizardAppRule<>(
      Application.class, 
      CONFIG_PATH, 
      ConfigOverride.config("dataSourceFactory.url", postgres.getJdbcUrl()), 
      ConfigOverride.config("dataSourceFactory.user", postgres.getUsername()), 
      ConfigOverride.config("dataSourceFactory.password", postgres.getPassword()) 
    ); 

我得到Caused by: java.lang.IllegalStateException: Mapped port can only be obtained after the container is started

链接这些结合在一起无法正常工作或

@ClassRule 
    public static TestRule chain = RuleChain.outerRule(postgres = new PostgreSQLContainer()) 
      .around(RULE = new DropwizardAppRule<>(
        Application.class, 
        CONFIG_PATH, 
        ConfigOverride.config("dataSourceFactory.url", postgres.getJdbcUrl()), 
        ConfigOverride.config("dataSourceFactory.user", postgres.getUsername()), 
        ConfigOverride.config("dataSourceFactory.password", postgres.getPassword()) 
      )); 

最后这个工程，但据我所知它运行的每个测试的新DropwizardAppRule，这是不好 ...

@ClassRule 
public static final PostgreSQLContainer postgres = new PostgreSQLContainer(); 

@Rule 
    public final DropwizardAppRule<Configuration> RULE = new DropwizardAppRule<>(
      Application.class, 
      CONFIG_PATH, 
      ConfigOverride.config("dataSourceFactory.url", postgres.getJdbcUrl()), 
      ConfigOverride.config("dataSourceFactory.user", postgres.getUsername()), 
      ConfigOverride.config("dataSourceFactory.password", postgres.getPassword()) 
    ); 

那么，如何链中的规则，使得PostgreSQLContainer是首先启动并且容器在创建DropwizardAppRule之前已经启动？

Answer 1

通过启动PostgreSQLContainer作为单例来实现它。

public static final PostgreSQLContainer postgres = new PostgreSQLContainer(); 
    static { 
     postgres.start(); 
    } 

    @ClassRule 
    public final DropwizardAppRule<Configuration> RULE = new DropwizardAppRule<>(
      Application.class, 
      CONFIG_PATH, 
      ConfigOverride.config("dataSourceFactory.url", postgres.getJdbcUrl()), 
      ConfigOverride.config("dataSourceFactory.user", postgres.getUsername()), 
      ConfigOverride.config("dataSourceFactory.password", postgres.getPassword()) 
    );