How to use

getContextLoader

method

in

org.springframework.test.context.MergedContextConfiguration

/**
 * Load the {@code ApplicationContext} for the supplied merged context configuration.
 * <p>Supports both the {@link SmartContextLoader} and {@link ContextLoader} SPIs.
 * @throws Exception if an error occurs while loading the application context
 */
protected ApplicationContext loadContextInternal(MergedContextConfiguration mergedContextConfiguration)
    throws Exception {
  ContextLoader contextLoader = mergedContextConfiguration.getContextLoader();
  Assert.notNull(contextLoader, "Cannot load an ApplicationContext with a NULL 'contextLoader'. " +
      "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
  ApplicationContext applicationContext;
  if (contextLoader instanceof SmartContextLoader) {
    SmartContextLoader smartContextLoader = (SmartContextLoader) contextLoader;
    applicationContext = smartContextLoader.loadContext(mergedContextConfiguration);
  }
  else {
    String[] locations = mergedContextConfiguration.getLocations();
    Assert.notNull(locations, "Cannot load an ApplicationContext with a NULL 'locations' array. " +
        "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
    applicationContext = contextLoader.loadContext(locations);
  }
  return applicationContext;
}

void assertMergedConfig(
    MergedContextConfiguration mergedConfig,
    Class<?> expectedTestClass,
    String[] expectedLocations,
    Class<?>[] expectedClasses,
    Set<Class<? extends ApplicationContextInitializer<?>>> expectedInitializerClasses,
    Class<? extends ContextLoader> expectedContextLoaderClass) {
  assertNotNull(mergedConfig);
  assertEquals(expectedTestClass, mergedConfig.getTestClass());
  assertNotNull(mergedConfig.getLocations());
  assertArrayEquals(expectedLocations, mergedConfig.getLocations());
  assertNotNull(mergedConfig.getClasses());
  assertArrayEquals(expectedClasses, mergedConfig.getClasses());
  assertNotNull(mergedConfig.getActiveProfiles());
  if (expectedContextLoaderClass == null) {
    assertNull(mergedConfig.getContextLoader());
  }
  else {
    assertEquals(expectedContextLoaderClass, mergedConfig.getContextLoader().getClass());
  }
  assertNotNull(mergedConfig.getContextInitializerClasses());
  assertEquals(expectedInitializerClasses, mergedConfig.getContextInitializerClasses());
}

/**
 * Added in order to support new version of Spring. There is a new
 * {@link org.springframework.test.context.SmartContextLoader} interface implemented in Spring.
 */
@Override
public ApplicationContext loadContext(MergedContextConfiguration mergedConfig) throws Exception {
  return mergedConfig.getContextLoader().loadContext(mergedConfig.getLocations());
}

/**
 * Load the {@code ApplicationContext} for the supplied merged context configuration.
 * <p>Supports both the {@link SmartContextLoader} and {@link ContextLoader} SPIs.
 * @throws Exception if an error occurs while loading the application context
 */
protected ApplicationContext loadContextInternal(MergedContextConfiguration mergedContextConfiguration)
    throws Exception {
  ContextLoader contextLoader = mergedContextConfiguration.getContextLoader();
  Assert.notNull(contextLoader, "Cannot load an ApplicationContext with a NULL 'contextLoader'. " +
      "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
  ApplicationContext applicationContext;
  if (contextLoader instanceof SmartContextLoader) {
    SmartContextLoader smartContextLoader = (SmartContextLoader) contextLoader;
    applicationContext = smartContextLoader.loadContext(mergedContextConfiguration);
  }
  else {
    String[] locations = mergedContextConfiguration.getLocations();
    Assert.notNull(locations, "Cannot load an ApplicationContext with a NULL 'locations' array. " +
        "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
    applicationContext = contextLoader.loadContext(locations);
  }
  return applicationContext;
}

/**
 * Load the {@code ApplicationContext} for the supplied merged context configuration.
 * <p>Supports both the {@link SmartContextLoader} and {@link ContextLoader} SPIs.
 * @throws Exception if an error occurs while loading the application context
 */
protected ApplicationContext loadContextInternal(MergedContextConfiguration mergedContextConfiguration)
    throws Exception {
  ContextLoader contextLoader = mergedContextConfiguration.getContextLoader();
  Assert.notNull(contextLoader, "Cannot load an ApplicationContext with a NULL 'contextLoader'. " +
      "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
  ApplicationContext applicationContext;
  if (contextLoader instanceof SmartContextLoader) {
    SmartContextLoader smartContextLoader = (SmartContextLoader) contextLoader;
    applicationContext = smartContextLoader.loadContext(mergedContextConfiguration);
  }
  else {
    String[] locations = mergedContextConfiguration.getLocations();
    Assert.notNull(locations, "Cannot load an ApplicationContext with a NULL 'locations' array. " +
        "Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.");
    applicationContext = contextLoader.loadContext(locations);
  }
  return applicationContext;
}

    .getContextLoader();
if (contextLoader == null) {
  contextLoader = BeanUtils.instantiateClass(

    .getContextLoader();
if (contextLoader == null) {
  contextLoader = BeanUtils.instantiateClass(

/**
 * Create a new {@link MergedContextConfiguration} with different classes and
 * properties.
 * @param mergedConfig the source config
 * @param classes the replacement classes
 * @param propertySourceProperties the replacement properties
 * @return a new {@link MergedContextConfiguration}
 */
protected final MergedContextConfiguration createModifiedConfig(
    MergedContextConfiguration mergedConfig, Class<?>[] classes,
    String[] propertySourceProperties) {
  return new MergedContextConfiguration(mergedConfig.getTestClass(),
      mergedConfig.getLocations(), classes,
      mergedConfig.getContextInitializerClasses(),
      mergedConfig.getActiveProfiles(),
      mergedConfig.getPropertySourceLocations(), propertySourceProperties,
      mergedConfig.getContextCustomizers(), mergedConfig.getContextLoader(),
      getCacheAwareContextLoaderDelegate(), mergedConfig.getParent());
}