import unittest
from piptools.datastructures import SpecSet


class TestSpecSet(unittest.TestCase):
    def test_adding_specs(self):
        """Adding specs to a set."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        assert 'Django>=1.3' in map(str, specset)

        specset.add_spec('django-pipeline')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline'], map(str, specset))

        specset.add_spec('Django<1.4')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline', 'Django<1.4'], map(str, specset))

    def test_normalizing(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        specset.add_spec('Django<1.4')
        specset.add_spec('Django>=1.3.2')
        specset.add_spec('Django<1.3.99')

        normalized = specset.normalize()
        assert 'Django>=1.3.2,<1.3.99' in map(str, normalized)

        specset.add_spec('Django<=1.3.2')
        normalized = specset.normalize()

        assert 'Django==1.3.2' in map(str, normalized)

import unittest
from piptools.datastructures import SpecSet


class TestSpecSet(unittest.TestCase):
    def test_adding_specs(self):
        """Adding specs to a set."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        assert 'Django>=1.3' in map(str, specset)

        specset.add_spec('django-pipeline')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline'], map(str, specset))

        specset.add_spec('Django<1.4')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline', 'Django<1.4'], map(str, specset))

    def test_normalizing(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        specset.add_spec('Django<1.4')
        specset.add_spec('Django>=1.3.2')
        specset.add_spec('Django<1.3.99')

        normalized = specset.normalize()
        assert 'Django>=1.3.2,<1.3.99' in map(str, normalized)

        specset.add_spec('Django<=1.3.2')
        normalized = specset.normalize()

        assert 'Django==1.3.2' in map(str, normalized)

    def test_normalizing_2(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django')
        specset.add_spec('Django<1.4')

        normalized = specset.normalize()
        assert 'Django<1.4' in map(str, normalized)

Add a simple test case.
Add a simple test case.

  import unittest
  from piptools.datastructures import SpecSet
  
  
  class TestSpecSet(unittest.TestCase):
      def test_adding_specs(self):
          """Adding specs to a set."""
          specset = SpecSet()
  
          specset.add_spec('Django>=1.3')
          assert 'Django>=1.3' in map(str, specset)
  
          specset.add_spec('django-pipeline')
          self.assertItemsEqual(['Django>=1.3', 'django-pipeline'], map(str, specset))
  
          specset.add_spec('Django<1.4')
          self.assertItemsEqual(['Django>=1.3', 'django-pipeline', 'Django<1.4'], map(str, specset))
  
      def test_normalizing(self):
          """Normalizing combines predicates to a single Spec."""
          specset = SpecSet()
  
          specset.add_spec('Django>=1.3')
          specset.add_spec('Django<1.4')
          specset.add_spec('Django>=1.3.2')
          specset.add_spec('Django<1.3.99')
  
          normalized = specset.normalize()
          assert 'Django>=1.3.2,<1.3.99' in map(str, normalized)
  
          specset.add_spec('Django<=1.3.2')
          normalized = specset.normalize()
  
          assert 'Django==1.3.2' in map(str, normalized)
  
+     def test_normalizing_2(self):
+         """Normalizing combines predicates to a single Spec."""
+         specset = SpecSet()
+ 
+         specset.add_spec('Django')
+         specset.add_spec('Django<1.4')
+ 
+         normalized = specset.normalize()
+         assert 'Django<1.4' in map(str, normalized)
+ 
Add a simple test case.
## Code Before:
import unittest
from piptools.datastructures import SpecSet


class TestSpecSet(unittest.TestCase):
    def test_adding_specs(self):
        """Adding specs to a set."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        assert 'Django>=1.3' in map(str, specset)

        specset.add_spec('django-pipeline')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline'], map(str, specset))

        specset.add_spec('Django<1.4')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline', 'Django<1.4'], map(str, specset))

    def test_normalizing(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        specset.add_spec('Django<1.4')
        specset.add_spec('Django>=1.3.2')
        specset.add_spec('Django<1.3.99')

        normalized = specset.normalize()
        assert 'Django>=1.3.2,<1.3.99' in map(str, normalized)

        specset.add_spec('Django<=1.3.2')
        normalized = specset.normalize()

        assert 'Django==1.3.2' in map(str, normalized)

## Instruction:
Add a simple test case.
## Code After:
import unittest
from piptools.datastructures import SpecSet


class TestSpecSet(unittest.TestCase):
    def test_adding_specs(self):
        """Adding specs to a set."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        assert 'Django>=1.3' in map(str, specset)

        specset.add_spec('django-pipeline')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline'], map(str, specset))

        specset.add_spec('Django<1.4')
        self.assertItemsEqual(['Django>=1.3', 'django-pipeline', 'Django<1.4'], map(str, specset))

    def test_normalizing(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django>=1.3')
        specset.add_spec('Django<1.4')
        specset.add_spec('Django>=1.3.2')
        specset.add_spec('Django<1.3.99')

        normalized = specset.normalize()
        assert 'Django>=1.3.2,<1.3.99' in map(str, normalized)

        specset.add_spec('Django<=1.3.2')
        normalized = specset.normalize()

        assert 'Django==1.3.2' in map(str, normalized)

    def test_normalizing_2(self):
        """Normalizing combines predicates to a single Spec."""
        specset = SpecSet()

        specset.add_spec('Django')
        specset.add_spec('Django<1.4')

        normalized = specset.normalize()
        assert 'Django<1.4' in map(str, normalized)
