/**
* Verify a ViewFileSystem wrapped over multiple federated NameNodes will dispatch the XAttr
* operations to the correct NameNode.
*/
@Test
public void testXAttrOnMountEntry() throws Exception {
// Set XAttrs on the first namespace and verify they are correct
fsView.setXAttr(mountOnNn1, name1, value1);
fsView.setXAttr(mountOnNn1, name2, value2);
assertEquals(2, fsView.getXAttrs(mountOnNn1).size());
assertArrayEquals(value1, fsView.getXAttr(mountOnNn1, name1));
assertArrayEquals(value2, fsView.getXAttr(mountOnNn1, name2));
// Double-check by getting the XAttrs using FileSystem
// instead of ViewFileSystem
assertArrayEquals(value1, fHdfs.getXAttr(targetTestRoot, name1));
assertArrayEquals(value2, fHdfs.getXAttr(targetTestRoot, name2));
// Paranoid check: verify the other namespace does not
// have XAttrs set on the same path.
assertEquals(0, fsView.getXAttrs(mountOnNn2).size());
assertEquals(0, fHdfs2.getXAttrs(targetTestRoot2).size());
// Remove the XAttr entries on the first namespace
fsView.removeXAttr(mountOnNn1, name1);
fsView.removeXAttr(mountOnNn1, name2);
assertEquals(0, fsView.getXAttrs(mountOnNn1).size());
assertEquals(0, fHdfs.getXAttrs(targetTestRoot).size());
// Now set XAttrs on the second namespace
fsView.setXAttr(mountOnNn2, name1, value1);
fsView.setXAttr(mountOnNn2, name2, value2);
assertEquals(2, fsView.getXAttrs(mountOnNn2).size());
assertArrayEquals(value1, fsView.getXAttr(mountOnNn2, name1));
assertArrayEquals(value2, fsView.getXAttr(mountOnNn2, name2));
assertArrayEquals(value1, fHdfs2.getXAttr(targetTestRoot2, name1));
assertArrayEquals(value2, fHdfs2.getXAttr(targetTestRoot2, name2));
fsView.removeXAttr(mountOnNn2, name1);
fsView.removeXAttr(mountOnNn2, name2);
assertEquals(0, fsView.getXAttrs(mountOnNn2).size());
assertEquals(0, fHdfs2.getXAttrs(targetTestRoot2).size());
}
