Add Spring factories test for initializers

Add a unit test that verifies ApplicationContextInitializer implementations are discovered via Spring factories. The test uses SpringFactoriesLoaderUtils.loadFactoryClasses to load ApplicationContextInitializer classes, asserts there are four entries, checks they are assignable from ConfigurableApplicationContextInitializer, and verifies the specific initializer classes (AutoRegistrationBeanInitializer, EventPublishingBeanInitializer, ListenableAutowireCandidateResolverInitializer, ListenableConfigurableEnvironmentInitializer) are present. Necessary imports and a static import were added to the test file.

Author: mercyblitz

microsphere-spring-context/src/test/java/io/microsphere/spring/context/ConfigurableApplicationContextInitializerTest.java

@@ -18,13 +18,21 @@
 package io.microsphere.spring.context;
 
 
+import io.microsphere.spring.beans.factory.support.ListenableAutowireCandidateResolverInitializer;
+import io.microsphere.spring.context.annotation.AutoRegistrationBeanInitializer;
+import io.microsphere.spring.context.event.EventPublishingBeanInitializer;
+import io.microsphere.spring.core.env.ListenableConfigurableEnvironmentInitializer;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.support.GenericApplicationContext;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.mock.env.MockEnvironment;
 
+import java.util.Set;
+
+import static io.microsphere.spring.core.io.support.SpringFactoriesLoaderUtils.loadFactoryClasses;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertSame;
@@ -80,6 +88,18 @@ public void testGetEnabledPropertyName() {
                 getEnabledPropertyName());
     }
 
+    @Test
+    public void testSpringFactories() {
+        Set<Class<ApplicationContextInitializer>> factoryClasses = loadFactoryClasses(ApplicationContextInitializer.class);
+        assertEquals(4, factoryClasses.size());
+        factoryClasses.forEach(factoryClass ->
+                assertTrue(ConfigurableApplicationContextInitializer.class.isAssignableFrom(factoryClass)));
+        assertTrue(factoryClasses.contains(AutoRegistrationBeanInitializer.class));
+        assertTrue(factoryClasses.contains(EventPublishingBeanInitializer.class));
+        assertTrue(factoryClasses.contains(ListenableAutowireCandidateResolverInitializer.class));
+        assertTrue(factoryClasses.contains(ListenableConfigurableEnvironmentInitializer.class));
+    }
+
     @Override
     protected void initialize(ConfigurableApplicationContext context, ConfigurableEnvironment environment) {
         this.context = context;