public void Should_construct_document_IDs()
{
Assert.AreEqual("col/123", ADocument.Identify("col", 123));
Assert.AreEqual("col/123", ADocument.Identify("col", "123"));
Assert.AreEqual("col/123a", ADocument.Identify("col", "123a"));
Assert.AreEqual(null, ADocument.Identify("col", "123 a"));
Assert.AreEqual(null, ADocument.Identify("", "123"));
Assert.AreEqual(null, ADocument.Identify("col", ""));
}