User AssertJ's hasSize() for arrays

Achieved via global search-and-replace.

spring-jms/src/test/java/org/springframework/jms/support/SimpleMessageConverterTests.java

@@ -78,7 +78,7 @@ public class SimpleMessageConverterTests {
 
 		SimpleMessageConverter converter = new SimpleMessageConverter();
 		Message msg = converter.toMessage(content, session);
-		assertThat(((byte[]) converter.fromMessage(msg)).length).isEqualTo(content.length);
+		assertThat(((byte[]) converter.fromMessage(msg))).hasSize(content.length);
 
 		verify(message).writeBytes(content);
 	}