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Index: urllib3-1.5/test/test_collections.py
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===================================================================
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--- urllib3-1.5.orig/test/test_collections.py
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+++ urllib3-1.5/test/test_collections.py
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@@ -122,9 +122,11 @@ class TestLRUContainer(unittest.TestCase
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     def test_iter(self):
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         d = Container()
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-        with self.assertRaises(NotImplementedError):
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+        def to_test():
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             for i in d:
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                 self.fail("Iteration shouldn't be implemented.")
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+        self.assertRaises(NotImplementedError, to_test)
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+
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 if __name__ == '__main__':
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     unittest.main()
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Index: urllib3-1.5/test/test_connectionpool.py
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===================================================================
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--- urllib3-1.5.orig/test/test_connectionpool.py
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+++ urllib3-1.5/test/test_connectionpool.py
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@@ -98,8 +98,7 @@ class TestConnectionPool(unittest.TestCa
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         def _test(exception, expect):
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             pool._make_request = lambda *args, **kwargs: _raise(exception)
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-            with self.assertRaises(expect):
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-                pool.request('GET', '/')
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+            self.assertRaises(expect, pool.request, 'GET', '/')
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             self.assertEqual(pool.pool.qsize(), POOL_SIZE)
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@@ -114,15 +113,13 @@ class TestConnectionPool(unittest.TestCa
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         # MaxRetryError, not EmptyPoolError
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         # See: https://github.com/shazow/urllib3/issues/76
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         pool._make_request = lambda *args, **kwargs: _raise(HTTPException)
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-        with self.assertRaises(MaxRetryError):
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-            pool.request('GET', '/', retries=1, pool_timeout=0.01)
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+        self.assertRaises(MaxRetryError, pool.request, 'GET', '/', retries=1, pool_timeout=0.01)
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         self.assertEqual(pool.pool.qsize(), POOL_SIZE)
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     def test_assert_same_host(self):
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         c = connection_from_url('http://google.com:80')
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-        with self.assertRaises(HostChangedError):
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-            c.request('GET', 'http://yahoo.com:80', assert_same_host=True)
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+        self.assertRaises(HostChangedError, c.request, 'GET', 'http://yahoo.com:80', assert_same_host=True)
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     def test_pool_close(self):
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         pool = connection_from_url('http://google.com:80')
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@@ -139,16 +136,13 @@ class TestConnectionPool(unittest.TestCa
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         pool.close()
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         self.assertEqual(pool.pool, None)
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-        with self.assertRaises(ClosedPoolError):
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-            pool._get_conn()
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+        self.assertRaises(ClosedPoolError, pool._get_conn)
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         pool._put_conn(conn3)
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-        with self.assertRaises(ClosedPoolError):
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-            pool._get_conn()
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+        self.assertRaises(ClosedPoolError, pool._get_conn)
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-        with self.assertRaises(Empty):
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-            old_pool_queue.get(block=False)
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+        self.assertRaises(Empty, old_pool_queue.get, block=False)
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 if __name__ == '__main__':
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Index: urllib3-1.5/test/test_poolmanager.py
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===================================================================
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--- urllib3-1.5.orig/test/test_poolmanager.py
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+++ urllib3-1.5/test/test_poolmanager.py
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@@ -54,13 +54,11 @@ class TestPoolManager(unittest.TestCase)
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         p.clear()
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         self.assertEqual(len(p.pools), 0)
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-        with self.assertRaises(ClosedPoolError):
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-            conn_pool._get_conn()
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+        self.assertRaises(ClosedPoolError, conn_pool._get_conn)
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         conn_pool._put_conn(conn)
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-        with self.assertRaises(ClosedPoolError):
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-            conn_pool._get_conn()
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+        self.assertRaises(ClosedPoolError, conn_pool._get_conn)
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         self.assertEqual(len(p.pools), 0)
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