Added tests for multifs priority

fs/tests/__init__.py

@@ -845,8 +845,6 @@ class FSTestCases(object):
 class ThreadingTestCases(object):
     """Testcases for thread-safety of FS implementations."""
         
-    
-    
     #  These are either too slow to be worth repeating,
     #  or cannot possibly break cross-thread.
     _dont_retest = ("test_pickling","test_multiple_overwrite",)

fs/tests/test_multifs.py

@@ -30,3 +30,54 @@ class TestMultiFS(unittest.TestCase):
         self.assert_(not m1.closed)
         self.assert_(not m2.closed)
     
+    
+    def test_priority(self):
+        """Test priority order is working"""
+        m1 = MemoryFS()
+        m2 = MemoryFS()
+        m3 = MemoryFS()
+        m1.setcontents("name", "m1")
+        m2.setcontents("name", "m2")
+        m3.setcontents("name", "m3")
+        multi_fs = MultiFS(auto_close=False)
+        multi_fs.addfs("m1", m1)
+        multi_fs.addfs("m2", m2)
+        multi_fs.addfs("m3", m3)
+        self.assert_(multi_fs.getcontents("name") == "m3")
+        
+        m1 = MemoryFS()
+        m2 = MemoryFS()
+        m3 = MemoryFS()
+        m1.setcontents("name", "m1")
+        m2.setcontents("name", "m2")
+        m3.setcontents("name", "m3")
+        multi_fs = MultiFS(auto_close=False)
+        multi_fs.addfs("m1", m1)
+        multi_fs.addfs("m2", m2, priority=10)
+        multi_fs.addfs("m3", m3)
+        self.assert_(multi_fs.getcontents("name") == "m2")        
+        
+        m1 = MemoryFS()
+        m2 = MemoryFS()
+        m3 = MemoryFS()
+        m1.setcontents("name", "m1")
+        m2.setcontents("name", "m2")
+        m3.setcontents("name", "m3")
+        multi_fs = MultiFS(auto_close=False)
+        multi_fs.addfs("m1", m1)
+        multi_fs.addfs("m2", m2, priority=10)
+        multi_fs.addfs("m3", m3, priority=10)
+        self.assert_(multi_fs.getcontents("name") == "m3")
+        
+        m1 = MemoryFS()
+        m2 = MemoryFS()
+        m3 = MemoryFS()
+        m1.setcontents("name", "m1")
+        m2.setcontents("name", "m2")
+        m3.setcontents("name", "m3")
+        multi_fs = MultiFS(auto_close=False)
+        multi_fs.addfs("m1", m1, priority=11)
+        multi_fs.addfs("m2", m2, priority=10)
+        multi_fs.addfs("m3", m3, priority=10)
+        self.assert_(multi_fs.getcontents("name") == "m1")
+        
\ No newline at end of file

fs/tests/test_s3fs.py

@@ -17,8 +17,8 @@ from six import PY3
 try:
     from fs import s3fs
 except ImportError:
-    if not PY3:
-        raise
+    raise unittest.SkipTest("s3fs wasn't importable")    
+    
 
 class TestS3FS(unittest.TestCase,FSTestCases,ThreadingTestCases):