Avoid String allocations with Assert.isTrue()

spring-test/src/test/java/org/springframework/test/context/junit4/hybrid/HybridContextLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -42,8 +42,8 @@ public class HybridContextLoader extends AbstractGenericContextLoader {
 
 	@Override
 	protected void validateMergedContextConfiguration(MergedContextConfiguration mergedConfig) {
-		Assert.isTrue(mergedConfig.hasClasses() || mergedConfig.hasLocations(), getClass().getSimpleName()
-				+ " requires either classes or locations");
+		Assert.isTrue(mergedConfig.hasResources(),
+				() -> getClass().getSimpleName() + " requires either classes or locations");
 	}
 
 	@Override