如何模拟 com.google.inject.Binder 和 org.yaml.snakeyaml.Yaml？

Question

根据我的要求，我必须将我的代码覆盖率提高到 80% 我有些达到了 71% 但 30% 的代码是在 main class 和 YAML 配置加载器 class.谁能告诉我如何为以下方法编写测试用例：-

private String configFilePath;

    private Optional<ItemMasterFileProcessorConfiguration> config;

    public ItemMasterFileProcessorTaskModule(String configFilePath)
    {
        this.configFilePath = configFilePath;
        config = Optional.empty();
    }

    @Override
    public void configure(Binder binder)
    {
        binder.bind(<Interface>.class).to(<ImplClass>.class);
        binder.bind(<Interface>.class).to(<ImplClass>.class);
    }

    @Provides
    public ItemMasterFileProcessorConfiguration getConfig() throws ItemMasterFileProcessorException
    {
        Yaml yaml = new Yaml();

        try
        {
            if (!config.isPresent())
            {
                ItemMasterFileProcessorConfiguration writerConfig = yaml.loadAs(ItemMasterFileProcessorConfiguration.class.getClassLoader().getResourceAsStream(configFilePath), ItemMasterFileProcessorConfiguration.class);
                config = Optional.of(writerConfig);
            }
            /*
             * Sonar is wanting is to add isPresent() before this But if I do
             * Sonar complains that it will always evaluate to TRUE
             */
            return config.get();
        }
        catch (Exception e)
        {
            throw new ItemMasterFileProcessorException("Config is NULL while initializing configuration for config path : {}", e);
        }
    }

Answer 1

如果您创建一个具有有效配置的临时文件，我在测试您的 class 时没有发现任何问题。您可以使用 JUnit 中的 TemporaryFolder 创建临时文件和一些 IOUtils 以 yaml 格式将配置写入文件。

以下示例来自官方org.junit.rules.TemporaryFolder javadoc

 public static class HasTempFolder {
  @Rule
  public TemporaryFolder folder= new TemporaryFolder();

  @Test
  public void testUsingTempFolder() throws IOException {
      File createdFile= folder.newFile("myfile.txt");
      File createdFolder= folder.newFolder("subfolder");
      // ...
     }
 }

如何模拟 com.google.inject.Binder 和 org.yaml.snakeyaml.Yaml？

How to mock com.google.inject.Binder and org.yaml.snakeyaml.Yaml?

java

junit

mockito

powermockito