Add @ConditionalOnWebApplication to SecurityConfiguration

fixes #405

Author: joshiste

problem-spring-web-autoconfigure/pom.xml

@@ -63,12 +63,27 @@
             <version>${spring-security.version}</version>
             <optional>true</optional>
         </dependency>
-
         <dependency>
             <groupId>org.zalando</groupId>
             <artifactId>problem-spring-web</artifactId>
             <version>${project.version}</version>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <version>${spring-boot.version}</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.hamcrest</groupId>
+                    <artifactId>java-hamcrest</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>ch.qos.logback</groupId>
+                    <artifactId>logback-classic</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
     </dependencies>
 </project>

problem-spring-web-autoconfigure/src/main/java/org/zalando/problem/spring/web/autoconfigure/security/SecurityConfiguration.java

@@ -2,6 +2,7 @@
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.Ordered;
@@ -14,6 +15,7 @@
  * Registers exception handling in spring-security
  */
 @Configuration
+@ConditionalOnWebApplication
 @ConditionalOnClass(WebSecurityConfigurerAdapter.class) //only when spring-security is in classpath
 @Import(SecurityProblemSupport.class)
 @Order(Ordered.LOWEST_PRECEDENCE - 21) //subtract random, uncommon number to reduce chances of collision with a user-selected order

problem-spring-web-autoconfigure/src/test/java/org/zalando/problem/spring/web/autoconfigure/security/SecurityConfigurationTest.java

@@ -0,0 +1,21 @@
+package org.zalando.problem.spring.web.autoconfigure.security;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+
+@SpringBootTest("spring.main.web-application-type=none")
+final class SecurityConfigurationTest {
+
+    @Test
+    void contextLoads(@Autowired ApplicationContext context) {
+        assertThat(context).isNotNull();
+    }
+
+    @SpringBootApplication
+    static class TestApplication {
+    }
+}