How to use

createModifiedConfig

method

in

org.springframework.boot.test.context.SpringBootTestContextBootstrapper

/**
 * Create a new {@link MergedContextConfiguration} with different classes.
 * @param mergedConfig the source config
 * @param classes the replacement classes
 * @return a new {@link MergedContextConfiguration}
 */
protected final MergedContextConfiguration createModifiedConfig(
    MergedContextConfiguration mergedConfig, Class<?>[] classes) {
  return createModifiedConfig(mergedConfig, classes,
      mergedConfig.getPropertySourceProperties());
}

@Override
protected MergedContextConfiguration processMergedContextConfiguration(
    MergedContextConfiguration mergedConfig) {
  Class<?>[] classes = getOrFindConfigurationClasses(mergedConfig);
  List<String> propertySourceProperties = getAndProcessPropertySourceProperties(
      mergedConfig);
  mergedConfig = createModifiedConfig(mergedConfig, classes,
      StringUtils.toStringArray(propertySourceProperties));
  WebEnvironment webEnvironment = getWebEnvironment(mergedConfig.getTestClass());
  if (webEnvironment != null && isWebEnvironmentSupported(mergedConfig)) {
    WebApplicationType webApplicationType = getWebApplicationType(mergedConfig);
    if (webApplicationType == WebApplicationType.SERVLET
        && (webEnvironment.isEmbedded()
            || webEnvironment == WebEnvironment.MOCK)) {
      WebAppConfiguration webAppConfiguration = AnnotatedElementUtils
          .findMergedAnnotation(mergedConfig.getTestClass(),
              WebAppConfiguration.class);
      String resourceBasePath = (webAppConfiguration != null)
          ? webAppConfiguration.value() : "src/main/webapp";
      mergedConfig = new WebMergedContextConfiguration(mergedConfig,
          resourceBasePath);
    }
    else if (webApplicationType == WebApplicationType.REACTIVE
        && (webEnvironment.isEmbedded()
            || webEnvironment == WebEnvironment.MOCK)) {
      return new ReactiveWebMergedContextConfiguration(mergedConfig);
    }
  }
  return mergedConfig;
}