Improve parse_address utils tests

tests/test_util.py

@@ -3,10 +3,22 @@
 # This file is part of gunicorn released under the MIT license.
 # See the NOTICE for more information.
 
+import pytest
+
 from gunicorn import util
 
 
 def test_parse_address():
     # Test unix socket addresses (PR #1623)
     assert util.parse_address('unix://var/run/test.sock') == 'var/run/test.sock'
     assert util.parse_address('unix:/var/run/test.sock') == '/var/run/test.sock'
+
+    assert util.parse_address('') == ('0.0.0.0', 8000)
+    assert util.parse_address('[::1]:8000') == ('::1', 8000)
+    assert util.parse_address('localhost:8000') == ('localhost', 8000)
+    assert util.parse_address('127.0.0.1:8000') == ('127.0.0.1', 8000)
+    assert util.parse_address('localhost') == ('localhost', 8000)
+
+    with pytest.raises(RuntimeError) as err:
+        assert util.parse_address('127.0.0.1:test')
+    assert "'test' is not a valid port number." in str(err)