Add Support for Custom Default Configuration in Web Security

Fixes gh-4102

config/src/test/java/org/springframework/security/config/annotation/web/WebSecurityConfigurerAdapterPowermockTests.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2002-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.powermock.api.mockito.PowerMockito.*;
+
+import java.util.Arrays;
+
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+import org.springframework.core.io.support.SpringFactoriesLoader;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.web.context.ConfigurableWebApplicationContext;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+
+/**
+ *
+ * @author Rob Winch
+ *
+ */
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({ SpringFactoriesLoader.class })
+public class WebSecurityConfigurerAdapterPowermockTests {
+	ConfigurableWebApplicationContext context;
+
+	@After
+	public void close() {
+		if(context != null) {
+			context.close();
+		}
+	}
+
+	@Test
+	public void loadConfigWhenDefaultConfigurerAsSpringFactoryhenDefaultConfigurerApplied() {
+		spy(SpringFactoriesLoader.class);
+		DefaultConfigurer configurer = new DefaultConfigurer();
+		when(SpringFactoriesLoader
+				.loadFactories(AbstractHttpConfigurer.class, getClass().getClassLoader()))
+			.thenReturn(Arrays.<AbstractHttpConfigurer>asList(configurer));
+
+		loadConfig(Config.class);
+
+		assertThat(configurer.init).isTrue();
+		assertThat(configurer.configure).isTrue();
+	}
+
+	private void loadConfig(Class<?>... classes) {
+		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
+		context.setClassLoader(getClass().getClassLoader());
+		context.register(classes);
+		context.refresh();
+		this.context = context;
+	}
+
+	@EnableWebSecurity
+	static class Config extends WebSecurityConfigurerAdapter {
+		@Override
+		protected void configure(HttpSecurity http) throws Exception {
+		}
+	}
+
+	static class DefaultConfigurer extends AbstractHttpConfigurer<DefaultConfigurer,HttpSecurity> {
+		boolean init;
+		boolean configure;
+
+		@Override
+		public void init(HttpSecurity builder) throws Exception {
+			this.init = true;
+		}
+
+		@Override
+		public void configure(HttpSecurity builder) throws Exception {
+			this.configure = true;
+		}
+	}
+}