Allow for prettytable 0.7.x as well

Relax requirements to >= 0.6, < 0.8, as 0.7.x seems to
work as well. Added testcase to ensure this.

Change-Id: I1a1a709e6053451b1256a0d78f8fe8562fb10e62

tests/test_utils.py

@@ -15,6 +15,8 @@
 
 import errno
 import testtools
+import sys
+import StringIO
 
 from glanceclient.common import utils
 
@@ -69,6 +71,47 @@ class TestUtils(testtools.TestCase):
         self.assertEqual(u'ni\xf1o', ensure_unicode('ni\xc3\xb1o',
                                                     incoming='ascii'))
 
+    def test_prettytable(self):
+        class Struct:
+            def __init__(self, **entries):
+                self.__dict__.update(entries)
+
+        # test that the prettytable output is wellformatted (left-aligned)
+        columns = ['ID', 'Name']
+        val = ['Name1', 'another', 'veeeery long']
+        images = [Struct(**{'id': i ** 16, 'name': val[i]})
+                  for i in range(len(val))]
+
+        saved_stdout = sys.stdout
+        try:
+            sys.stdout = output_list = StringIO.StringIO()
+            utils.print_list(images, columns)
+
+            sys.stdout = output_dict = StringIO.StringIO()
+            utils.print_dict({'K': 'k', 'Key': 'Value'})
+
+        finally:
+            sys.stdout = saved_stdout
+
+        self.assertEqual(output_list.getvalue(), '''\
++-------+--------------+
+| ID    | Name         |
++-------+--------------+
+|       | Name1        |
+| 1     | another      |
+| 65536 | veeeery long |
++-------+--------------+
+''')
+
+        self.assertEqual(output_dict.getvalue(), '''\
++----------+-------+
+| Property | Value |
++----------+-------+
+| K        | k     |
+| Key      | Value |
++----------+-------+
+''')
+
     def test_ensure_str(self):
         ensure_str = utils.ensure_str
         self.assertEqual("True", ensure_str(True))

tools/pip-requires

@@ -1,5 +1,5 @@
 argparse
-prettytable>=0.6,<0.7
+prettytable>=0.6,<0.8
 python-keystoneclient>=0.1.2,<1
 pyOpenSSL
 warlock>=0.7.0,<2