title: Exclude Hibernate in Spring Boot not working
body: <p>I'm trying to start JUnit tests wihout hibernate. My Application class:</p>
  
  <pre><code>@SpringBootApplication(exclude = { HibernateJpaAutoConfiguration.class, JpaRepositoriesAutoConfiguration.class,
      DataSourceAutoConfiguration.class, JpaBaseConfiguration.class, WebMvcAutoConfiguration.class })
  @ComponentScan("my.base.package")
  public class TestContext {
  
    public static void main(String[] args) {
      SpringApplication.run(TestContext.class, args);
    }
  
  }
  </code></pre>
  
  <p>As you can see you I excluded more and more stuff but its always the same error. My Tests: </p>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @SpringApplicationConfiguration(classes = TestContext.class)
  public class TestMail {
      @Autowired
      private Component c;
  
      public void setC(Component c) {
          this.c = c;
      }
  
      @Test
      public void test() {
         ...
      }
  
  }
  </code></pre>
  
  <p>When I start the tests Hibernate will be configured and fails with: </p>
  
  <pre><code>org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$NonEmbeddedConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (the profiles "dev" are currently active).
  </code></pre>
  
  <p>So starting only the application or as context for the tests also starts hibernate configuration. What am I doing wrong?</p>
  
  <p>EDIT:
  Having only: </p>
  
  <pre><code>@SpringBootApplication(exclude = { HibernateJpaAutoConfiguration.class, JpaRepositoriesAutoConfiguration.class}) 
  </code></pre>
  
  <p>Does not throw any exception until I try to use actual hibernate stuff. However it builds the database correctly...</p>
  
  <p>EDIT2:
  The problem was a custom config class that had @EnableJpaRepositories on. Also this seems not possible because Beans annotated with @Component which have autowired repositories will fail because the beans cannot be created.</p>