1 files changed, 30 insertions, 0 deletions
diff --git a/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/maintenance/StorageMaintainerTest.java b/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/maintenance/StorageMaintainerTest.java
new file mode 100644
index 00000000000..c1603a7535e
--- /dev/null
+++ b/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/maintenance/StorageMaintainerTest.java
@@ -0,0 +1,30 @@
+package com.yahoo.vespa.hosted.node.admin.maintenance;
+
+import com.yahoo.vespa.hosted.node.maintenance.DeleteOldAppDataTest;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.IOException;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author dybis
+ */
+public class StorageMaintainerTest {
+
+    @Rule
+    public TemporaryFolder folder = new TemporaryFolder();
+
+    @Test
+    public void testDiskUsed() throws IOException, InterruptedException {
+        int writeSize = 10000;
+        DeleteOldAppDataTest.writeNBytesToFile(folder.newFile(), writeSize);
+
+        StorageMaintainer storageMaintainer = new StorageMaintainer();
+        long usedBytes = storageMaintainer.getDiscUsedInBytes(folder.getRoot());
+        if (usedBytes * 4 < writeSize || usedBytes > writeSize * 4)
+            fail("Used bytes is " + usedBytes + ", but wrote " + writeSize + " bytes, not even close.");
+    }
+}
+\ No newline at end of file