To test importing an address book, make a new file in the
/import/test/unit directory with the prefix test_ in the filename
(ex. test_ldif_import.js).

It should have a function named run_test with no parameters.  If you are using
import_helper.js, which is already imported, you must at least get the file
to import and make a new AbImportHelper object with at least the file and type
of import.  Call the beginImport method on the object when you are ready to
start the import.

If you would like the results of the import checked, make sure to update
addressbook.json.  This file is read by import_helper.js to compare the address
book cards imported to an array of "cards" in in this file. When making a new
import, first chose a name for the array (like basic_addressbook) to store the
cards that should be in the newly-imported address book.  The properties and
values of each object in the array should identical to the properties and values
of the newly-imported card(s) and the cards themselves need to be in the
expected order.  If a card to be imported does not have a property, do not
include it in the JSON card.  Multiple types of imports can be tested with one
array, as only the supported attributes are checked.

You will also need to give the AbImportHelper constructor two additional
parameters: the name the imported address book will have (the filename without
the extension) and the name you chose for the JSON object.

Here is a sample LDIF unit test that doesn't check the results:
function run_test()
{
  var file = do_get_file("resources/basic_ldif_addressbook.ldif");
  new AbImportHelper(file, "Text file").beginImport();
}

Here is a sample CSV unit test that checks the results:
function run_test()
{
  var file = do_get_file("resources/basic_csv_addressbook.csv");
  new AbImportHelper(file, "Text file", "basic_csv_addressbook",
                     "basic_addressbook").beginImport();
}