Note behaviour of @MockBean and @SpyBean with non-bean dependencies

Closes gh-10381

Author: wilkinsona

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -37,8 +37,12 @@
  * or test classes that are {@link RunWith @RunWith} the {@link SpringRunner}.
  * <p>
  * Mocks can be registered by type or by {@link #name() bean name}. Any existing single
- * bean of the same type defined in the context will be replaced by the mock, if no
- * existing bean is defined a new one will be added.
+ * bean of the same type defined in the context will be replaced by the mock. If no
+ * existing bean is defined a new one will be added. Dependencies that are known to the
+ * application context but are not beans (such as those
+ * {@link org.springframework.beans.factory.config.ConfigurableListableBeanFactory#registerResolvableDependency(Class, Object)
+ * registered directly} ) will not be found and a mocked bean will be added to the context
+ * alongside the existing dependency.
  * <p>
  * When {@code @MockBean} is used on a field, as well as being registered in the
  * application context, the mock will also be injected into the field. Typical usage might

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/SpyBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -38,7 +38,11 @@
  * <p>
  * Spies can be applied by type or by {@link #name() bean name}. All beans in the context
  * of the same type will be wrapped with the spy. If no existing bean is defined a new one
- * will be added.
+ * will be added. Dependencies that are known to the application context but are not beans
+ * (such as those
+ * {@link org.springframework.beans.factory.config.ConfigurableListableBeanFactory#registerResolvableDependency(Class, Object)
+ * registered directly} ) will not be found and a spied bean will be added to the context
+ * alongside the existing dependency.
  * <p>
  * When {@code @SpyBean} is used on a field, as well as being registered in the
  * application context, the spy will also be injected into the field. Typical usage might