add some tests for the pth writer/manager

--HG--
branch : distribute
extra : rebase_source : b7e6abf35a947b39b6290b076f618ce75211757e

setuptools/tests/test_easy_install.py

@@ -3,7 +3,9 @@
 import sys
 import os, shutil, tempfile, unittest
 from setuptools.command.easy_install import easy_install, get_script_args, main
+from setuptools.command.easy_install import  PthDistributions
 from setuptools.dist import Distribution
+from pkg_resources import Distribution as PRDistribution
 
 class FakeDist(object):
     def get_entry_map(self, group):
@@ -90,3 +92,19 @@ class TestEasyInstallTest(unittest.TestCase):
             os.chdir(old_wd)
             shutil.rmtree(dir)
 
+class TestPTHFileWriter(unittest.TestCase):
+    def test_add_from_cwd_site_sets_dirty(self):
+        '''a pth file manager should set dirty 
+        if a distribution is in site but also the cwd
+        '''
+        pth = PthDistributions('does-not_exist', [os.getcwd()])
+        self.assertFalse(pth.dirty)
+        pth.add(PRDistribution(os.getcwd()))
+        self.assertTrue(pth.dirty)
+
+    def test_add_from_site_is_ignored(self):
+        pth = PthDistributions('does-not_exist', ['/test/location/does-not-have-to-exist'])
+        self.assertFalse(pth.dirty)
+        pth.add(PRDistribution('/test/location/does-not-have-to-exist'))
+        self.assertFalse(pth.dirty)
+