Polishing

spring-test/src/main/java/org/springframework/test/context/support/DynamicPropertiesContextCustomizer.java

@@ -45,6 +45,8 @@ import org.springframework.util.ReflectionUtils;
  * @author Sam Brannen
  * @since 5.2.5
  * @see DynamicPropertiesContextCustomizerFactory
+ * @see DefaultDynamicPropertyRegistry
+ * @see DynamicPropertySourceBeanInitializer
  */
 class DynamicPropertiesContextCustomizer implements ContextCustomizer {
 
@@ -59,20 +61,11 @@ class DynamicPropertiesContextCustomizer implements ContextCustomizer {
 
 
 	DynamicPropertiesContextCustomizer(Set<Method> methods) {
-		methods.forEach(this::assertValid);
+		methods.forEach(DynamicPropertiesContextCustomizer::assertValid);
 		this.methods = methods;
 	}
 
 
-	private void assertValid(Method method) {
-		Assert.state(Modifier.isStatic(method.getModifiers()),
-				() -> "@DynamicPropertySource method '" + method.getName() + "' must be static");
-		Class<?>[] types = method.getParameterTypes();
-		Assert.state(types.length == 1 && types[0] == DynamicPropertyRegistry.class,
-				() -> "@DynamicPropertySource method '" + method.getName() +
-						"' must accept a single DynamicPropertyRegistry argument");
-	}
-
 	@Override
 	public void customizeContext(ConfigurableApplicationContext context, MergedContextConfiguration mergedConfig) {
 		ConfigurableEnvironment environment = context.getEnvironment();
@@ -115,4 +108,14 @@ class DynamicPropertiesContextCustomizer implements ContextCustomizer {
 		return this.methods.hashCode();
 	}
 
+
+	private static void assertValid(Method method) {
+		Assert.state(Modifier.isStatic(method.getModifiers()),
+				() -> "@DynamicPropertySource method '" + method.getName() + "' must be static");
+		Class<?>[] types = method.getParameterTypes();
+		Assert.state(types.length == 1 && types[0] == DynamicPropertyRegistry.class,
+				() -> "@DynamicPropertySource method '" + method.getName() +
+						"' must accept a single DynamicPropertyRegistry argument");
+	}
+
 }

spring-test/src/main/java/org/springframework/test/context/support/DynamicValuesPropertySource.java

@@ -41,6 +41,7 @@ class DynamicValuesPropertySource extends MapPropertySource {
 		super(PROPERTY_SOURCE_NAME, Collections.unmodifiableMap(valueSuppliers));
 	}
 
+
 	@Override
 	@Nullable
 	public Object getProperty(String name) {