Polishing

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

@@ -151,7 +151,7 @@ public abstract class AbstractDelegatingSmartContextLoader implements SmartConte
 	@Override
 	public void processContextConfiguration(final ContextConfigurationAttributes configAttributes) {
 		Assert.notNull(configAttributes, "configAttributes must not be null");
-		Assert.isTrue(!(configAttributes.hasLocations() && configAttributes.hasClasses()), String.format(
+		Assert.isTrue(!(configAttributes.hasLocations() && configAttributes.hasClasses()), () -> String.format(
 			"Cannot process locations AND classes for context configuration %s: "
 					+ "configure one or the other, but not both.", configAttributes));
 

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

@@ -555,12 +555,7 @@ public abstract class AbstractTestContextBootstrapper implements TestContextBoot
 
 
 	private static boolean areAllEmpty(Collection<?>... collections) {
-		for (Collection<?> collection : collections) {
-			if (!collection.isEmpty()) {
-				return false;
-			}
-		}
-		return true;
+		return Arrays.stream(collections).allMatch(Collection::isEmpty);
 	}
 
 }

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

@@ -118,7 +118,7 @@ public abstract class TestPropertySourceUtils {
 			}
 			String[] locationsArray = TestContextResourceUtils.convertToClasspathResourcePaths(
 					attrs.getDeclaringClass(), attrs.getLocations());
-			locations.addAll(0, Arrays.<String> asList(locationsArray));
+			locations.addAll(0, Arrays.asList(locationsArray));
 			if (!attrs.isInheritLocations()) {
 				break;
 			}