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@@ -1,6 +1,7 @@
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 """
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   Input parsers for Hadoop tasks.
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 """
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+from sys import stdin
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 from itertools import imap
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 class LineParser(object):
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@@ -12,7 +13,7 @@ class LineParser(object):
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     >>> lines = [line for line in p]
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     ['blah', 'blee', 'blorg']
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   """
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-  def __init__(self, iterable):
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+  def __init__(self, iterable=stdin):
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     """
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       Creates a new LineParser instance which will iterate over the provided
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       iterable.

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@@ -14,7 +14,7 @@ class ParserTests(unittest.TestCase):
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   @test
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   def line_parser_should_parse_single_lines(self):
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-    p = LineParser(self.fixture)
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+    p = LineParser(iterable=self.fixture)
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     result = [l for l in p]
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     self.assertEqual(2, len(result))
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     self.assertEqual('one\ttwo\tthree', result[0])
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@@ -22,12 +22,15 @@ class ParserTests(unittest.TestCase):
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   @test
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   def tsv_parser_should_parse_tuples(self):
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-    p = TSVParser(self.fixture)
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+    p = TSVParser(iterable=self.fixture)
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     result = [l for l in p]
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     self.assertEqual(2, len(result))
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     self.assertEqual(('one', ('two', 'three')), result[0])
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     self.assertEqual(('four', ('five', 'six')), result[1])
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+def suite():
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+  return unittest.makeSuite(ParserTests)
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+
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 if __name__ == '__main__':
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   unittest.main()
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\ No newline at end of file