@Test
  public void throwsErrorWhenMultipleDbConfigAvailable() throws Exception {
    DbConfig dbConfig1 = mock(DbConfig.class);
    when(dbConfig1.getName()).thenReturn("dbConfig1");
    DbConfig dbConfig2 = mock(DbConfig.class);
    when(dbConfig2.getName()).thenReturn("dbConfig2");

    DbConfigResolver dbConfigResolver1 = mock(DbConfigResolver.class);
    when(dbConfigResolver1.resolve(null)).thenReturn(dbConfig1);

    DbConfigResolver dbConfigResolver2 = mock(DbConfigResolver.class);
    when(dbConfigResolver2.resolve(null)).thenReturn(dbConfig2);

    MuleRegistry registry = mock(MuleRegistry.class);
    Collection<DbConfigResolver> foundDbConfigResolvers = new ArrayList<>();
    foundDbConfigResolvers.add(dbConfigResolver1);
    foundDbConfigResolvers.add(dbConfigResolver2);

    when(registry.lookupObjects(DbConfigResolver.class)).thenReturn(foundDbConfigResolvers);

    DefaultDbConfigResolver dbConfigResolver = new DefaultDbConfigResolver(registry);

    try {
      dbConfigResolver.resolve(muleEvent);
      fail("Was supposed to fail when there are multiple dbConfigs available");
    } catch (UnresolvableDbConfigException e) {
      assertThat(e.getMessage(), containsString("dbConfig1"));
      assertThat(e.getMessage(), containsString("dbConfig2"));
    }
  }
  @Test
  public void testsConnection() throws Exception {
    DbConfig dbConfig = mock(DbConfig.class);
    TestResult expectedTestResult = mock(TestResult.class);
    when(dbConfig.test()).thenReturn(expectedTestResult);

    DbConfigResolver dbConfigResolver = mock(DbConfigResolver.class);
    when(dbConfigResolver.resolve(null)).thenReturn(dbConfig);

    MuleRegistry registry = createMockRegistry(dbConfigResolver);
    DefaultDbConfigResolver defaultDbConfigResolver = new DefaultDbConfigResolver(registry);

    final TestResult testResult = defaultDbConfigResolver.test();

    assertThat(testResult, is(expectedTestResult));
  }
  @Test
  public void returnsMetaDataKeys() throws Exception {
    DbConfig dbConfig = mock(DbConfig.class);
    final Result<List<MetaDataKey>> expectedMetaDataResult = mock(Result.class);
    when(dbConfig.getMetaDataKeys()).thenReturn(expectedMetaDataResult);

    DbConfigResolver dbConfigResolver = mock(DbConfigResolver.class);
    when(dbConfigResolver.resolve(null)).thenReturn(dbConfig);

    MuleRegistry registry = createMockRegistry(dbConfigResolver);
    DefaultDbConfigResolver defaultDbConfigResolver = new DefaultDbConfigResolver(registry);

    final Result<List<MetaDataKey>> metaDataResult = defaultDbConfigResolver.getMetaDataKeys();

    assertThat(metaDataResult, is(expectedMetaDataResult));
  }