Merge pull request #20580 from Phoosha

* gh-20580:
  Polish "Improve handling of non-existent path in disk space health check"
  Improve handling of non-existent path in disk space health check

Closes gh-20580

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthIndicatorProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -48,8 +48,6 @@ public class DiskSpaceHealthIndicatorProperties {
 	}
 
 	public void setPath(File path) {
-		Assert.isTrue(path.exists(), () -> "Path '" + path + "' does not exist");
-		Assert.isTrue(path.canRead(), () -> "Path '" + path + "' cannot be read");
 		this.path = path;
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -58,6 +58,12 @@ class DiskSpaceHealthContributorAutoConfigurationTests {
 		});
 	}
 
+	@Test
+	void runWhenPathDoesNotExistShouldCreateIndicator() {
+		this.contextRunner.withPropertyValues("management.health.diskspace.path=does/not/exist")
+				.run((context) -> assertThat(context).hasSingleBean(DiskSpaceHealthIndicator.class));
+	}
+
 	@Test
 	void runWhenDisabledShouldNotCreateIndicator() {
 		this.contextRunner.withPropertyValues("management.health.diskspace.enabled:false")

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/system/DiskSpaceHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -68,7 +68,7 @@ public class DiskSpaceHealthIndicator extends AbstractHealthIndicator {
 			builder.down();
 		}
 		builder.withDetail("total", this.path.getTotalSpace()).withDetail("free", diskFreeInBytes)
-				.withDetail("threshold", this.threshold.toBytes());
+				.withDetail("threshold", this.threshold.toBytes()).withDetail("exists", this.path.exists());
 	}
 
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -52,7 +52,6 @@ class DiskSpaceHealthIndicatorTests {
 	void setUp() {
 		MockitoAnnotations.initMocks(this);
 		given(this.fileMock.exists()).willReturn(true);
-		given(this.fileMock.canRead()).willReturn(true);
 		this.healthIndicator = new DiskSpaceHealthIndicator(this.fileMock, THRESHOLD);
 	}
 
@@ -66,6 +65,7 @@ class DiskSpaceHealthIndicatorTests {
 		assertThat(health.getDetails().get("threshold")).isEqualTo(THRESHOLD.toBytes());
 		assertThat(health.getDetails().get("free")).isEqualTo(freeSpace);
 		assertThat(health.getDetails().get("total")).isEqualTo(TOTAL_SPACE.toBytes());
+		assertThat(health.getDetails().get("exists")).isEqualTo(true);
 	}
 
 	@Test
@@ -78,6 +78,16 @@ class DiskSpaceHealthIndicatorTests {
 		assertThat(health.getDetails().get("threshold")).isEqualTo(THRESHOLD.toBytes());
 		assertThat(health.getDetails().get("free")).isEqualTo(freeSpace);
 		assertThat(health.getDetails().get("total")).isEqualTo(TOTAL_SPACE.toBytes());
+		assertThat(health.getDetails().get("exists")).isEqualTo(true);
+	}
+
+	@Test
+	void whenPathDoesNotExistDiskSpaceIsDown() {
+		Health health = new DiskSpaceHealthIndicator(new File("does/not/exist"), THRESHOLD).health();
+		assertThat(health.getStatus()).isEqualTo(Status.DOWN);
+		assertThat(health.getDetails().get("free")).isEqualTo(0L);
+		assertThat(health.getDetails().get("total")).isEqualTo(0L);
+		assertThat(health.getDetails().get("exists")).isEqualTo(false);
 	}
 
 }