public virtual void TestIsCurrent()
{
Directory dir1 = GetDir1();
Directory dir2 = GetDir2();
ParallelReader pr = new ParallelReader();
pr.Add(IndexReader.Open(dir1));
pr.Add(IndexReader.Open(dir2));
Assert.IsTrue(pr.IsCurrent());
IndexReader modifier = IndexReader.Open(dir1);
modifier.SetNorm(0, "f1", 100);
modifier.Close();
// one of the two IndexReaders which ParallelReader is using
// is not current anymore
Assert.IsFalse(pr.IsCurrent());
modifier = IndexReader.Open(dir2);
modifier.SetNorm(0, "f3", 100);
modifier.Close();
// now both are not current anymore
Assert.IsFalse(pr.IsCurrent());
}