assertEquals("Hello world 2", contents);
setNewFileContent(file2, "changed 2");
DiscardChangesOperation dcop = new DiscardChangesOperation(
new IResource[] { file1, file2 });
dcop.execute(new NullProgressMonitor());
contents = testUtils.slurpAndClose(file1.getContents());
assertEquals("Hello world 1", contents);
contents = testUtils.slurpAndClose(file2.getContents());