USE jna to provide access to native fadvise system call

1 files changed, 35 insertions, 0 deletions

diff --git a/vespajlib/src/test/java/com/yahoo/io/NativeIOTestCase.java b/vespajlib/src/test/java/com/yahoo/io/NativeIOTestCase.java
new file mode 100644
index 00000000000..91144d5999f
--- /dev/null
+++ b/vespajlib/src/test/java/com/yahoo/io/NativeIOTestCase.java
@@ -0,0 +1,35 @@
+package com.yahoo.io;
+
+import com.sun.jna.Platform;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+
+public class NativeIOTestCase {
+
+    @Test
+    public void requireThatDropFileFromCacheDoesNotThrow() throws IOException {
+        File testFile = new File("testfile");
+        FileOutputStream output = new FileOutputStream(testFile);
+        output.write('t');
+        output.flush();
+        output.close();
+        try {
+            NativeIO nativeIO = new NativeIO();
+            nativeIO.dropFileFromCache(output.getFD());
+            nativeIO.dropFileFromCache(testFile);
+        } catch (Throwable e) {
+            if (Platform.isLinux()) {
+                assertTrue(false);
+            } else {
+                assertEquals("Platform is unsúpported. Only supported on linux.", e.getMessage());
+            }
+        }
+    }
+}