Improve test coverage of PropertiesMeterFilter

Closes gh-14689

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilterTests.java

@@ -71,6 +71,14 @@ public class PropertiesMeterFilterTests {
 				.isEqualTo(MeterFilterReply.NEUTRAL);
 	}
 
+	@Test
+	public void acceptWhenHasNoMatchingEnabledPropertyShouldReturnNeutral() {
+		PropertiesMeterFilter filter = new PropertiesMeterFilter(
+				createProperties("enable.something.else=false"));
+		assertThat(filter.accept(createMeterId("spring.boot")))
+				.isEqualTo(MeterFilterReply.NEUTRAL);
+	}
+
 	@Test
 	public void acceptWhenHasEnableFalseShouldReturnDeny() {
 		PropertiesMeterFilter filter = new PropertiesMeterFilter(