Document visibility requirements for Bean Overrides

This commit makes it clear that there are no visibility requirements
for @⁠TestBean fields or factory methods as well as @⁠MockitoBean or
@⁠MockitoSpyBean fields.

Closes gh-33923

framework-docs/modules/ROOT/pages/testing/annotations/integration-spring/annotation-mockitobean.adoc

@@ -52,6 +52,15 @@ When using `@MockitoSpyBean` to create a spy for a `FactoryBean`, a spy will be
 for the object created by the `FactoryBean`, not for the `FactoryBean` itself.
 ====
 
+[NOTE]
+====
+There are no restrictions on the visibility of `@MockitoBean` and `@MockitoSpyBean`
+fields.
+
+Such fields can therefore be `public`, `protected`, package-private (default visibility),
+or `private` depending on the needs or coding practices of the project.
+====
+
 The following example shows how to use the default behavior of the `@MockitoBean` annotation:
 
 [tabs]
@@ -62,7 +71,7 @@ Java::
 ----
 	class OverrideBeanTests {
 		@MockitoBean // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 	}
@@ -86,7 +95,7 @@ Java::
 ----
 	class OverrideBeanTests {
 		@MockitoBean("service") // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 
@@ -107,7 +116,7 @@ Java::
 ----
 	class OverrideBeanTests {
 		@MockitoSpyBean // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 	}
@@ -130,7 +139,7 @@ Java::
 ----
 	class OverrideBeanTests {
 		@MockitoSpyBean("service") // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 

framework-docs/modules/ROOT/pages/testing/annotations/integration-spring/annotation-testbean.adoc

@@ -30,6 +30,14 @@ same bean in several tests, make sure to name the field consistently to avoid cr
 unnecessary contexts.
 ====
 
+[NOTE]
+====
+There are no restrictions on the visibility of `@TestBean` fields or factory methods.
+
+Such fields and methods can therefore be `public`, `protected`, package-private (default
+visibility), or `private` depending on the needs or coding practices of the project.
+====
+
 The following example shows how to use the default behavior of the `@TestBean` annotation:
 
 [tabs]
@@ -40,11 +48,11 @@ Java::
 ----
 	class OverrideBeanTests {
 		@TestBean // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 
-		private static CustomService customService() { // <2>
+		static CustomService customService() { // <2>
 			return new MyFakeCustomService();
 		}
 	}
@@ -68,11 +76,11 @@ Java::
 ----
 	class OverrideBeanTests {
 		@TestBean(name = "service", methodName = "createCustomService") // <1>
-		private CustomService customService;
+		CustomService customService;
 
 		// test case body...
 
-		private static CustomService createCustomService() { // <2>
+		static CustomService createCustomService() { // <2>
 			return new MyFakeCustomService();
 		}
 	}

spring-test/src/main/java/org/springframework/test/context/bean/override/convention/TestBean.java

@@ -105,6 +105,11 @@ import org.springframework.test.context.bean.override.BeanOverride;
  * FactoryBean}, the {@code FactoryBean} will be replaced with a singleton bean
  * corresponding to the value returned from the {@code @TestBean} factory method.
  *
+ * <p>There are no restrictions on the visibility of {@code @TestBean} fields or
+ * factory methods. Such fields and methods can therefore be {@code public},
+ * {@code protected}, package-private (default visibility), or {@code private}
+ * depending on the needs or coding practices of the project.
+ *
  * @author Simon Baslé
  * @author Stephane Nicoll
  * @author Sam Brannen

spring-test/src/main/java/org/springframework/test/context/bean/override/mockito/MockitoBean.java

@@ -58,6 +58,11 @@ import org.springframework.test.context.bean.override.BeanOverride;
  * FactoryBean}, the {@code FactoryBean} will be replaced with a singleton mock
  * of the type of object created by the {@code FactoryBean}.
  *
+ * <p>There are no restrictions on the visibility of a {@code @MockitoBean} field.
+ * Such fields can therefore be {@code public}, {@code protected}, package-private
+ * (default visibility), or {@code private} depending on the needs or coding
+ * practices of the project.
+ *
  * @author Simon Baslé
  * @author Sam Brannen
  * @since 6.2

spring-test/src/main/java/org/springframework/test/context/bean/override/mockito/MockitoSpyBean.java

@@ -51,6 +51,11 @@ import org.springframework.test.context.bean.override.BeanOverride;
  * a spy will be created for the object created by the {@code FactoryBean}, not
  * for the {@code FactoryBean} itself.
  *
+ * <p>There are no restrictions on the visibility of a {@code @MockitoSpyBean} field.
+ * Such fields can therefore be {@code public}, {@code protected}, package-private
+ * (default visibility), or {@code private} depending on the needs or coding
+ * practices of the project.
+ *
  * @author Simon Baslé
  * @author Sam Brannen
  * @since 6.2