Add test for DiskSpaceHealthIndicator path

Author: Phoosha

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthContributorAutoConfigurationTests.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.actuate.autoconfigure.system;
 
+import java.util.UUID;
+
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.actuate.autoconfigure.health.HealthContributorAutoConfiguration;
@@ -58,6 +60,14 @@ void thresholdCanBeCustomized() {
 		});
 	}
 
+	@Test
+	void pathMustExist() {
+		String randomPath = "IDoNOTeXiST" + UUID.randomUUID().toString();
+		this.contextRunner.withPropertyValues("management.health.diskspace.path=" + randomPath)
+				.run((context) -> assertThat(context).hasFailed().getFailure()
+						.hasStackTraceContaining("Path '" + randomPath + "' does not exist"));
+	}
+
 	@Test
 	void runWhenDisabledShouldNotCreateIndicator() {
 		this.contextRunner.withPropertyValues("management.health.diskspace.enabled:false")