Add test for the indentation fix.

IPython/lib/tests/test_pretty.py

@@ -0,0 +1,49 b''
+"""Tests for IPython.lib.pretty.
+"""
+#-----------------------------------------------------------------------------
+# Copyright (c) 2011, the IPython Development Team.
+#
+# Distributed under the terms of the Modified BSD License.
+#
+# The full license is in the file COPYING.txt, distributed with this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+from __future__ import print_function
+
+# Third-party imports
+import nose.tools as nt
+
+# Our own imports
+from IPython.lib import pretty
+
+#-----------------------------------------------------------------------------
+# Classes and functions
+#-----------------------------------------------------------------------------
+
+class MyList(object):
+    def __init__(self, content):
+        self.content = content
+    def _repr_pretty_(self, p, cycle):
+        if cycle:
+            p.text("MyList(...)")
+        else:
+            with p.group(3, "MyList(", ")"):
+                for (i, child) in enumerate(self.content):
+                    if i:
+                        p.text(",")
+                        p.breakable()
+                    else:
+                        p.breakable("")
+                    p.pretty(child)
+
+
+def test_indentation():
+    """Test correct indentation in groups"""
+    count = 40
+    gotoutput = pretty.pretty(MyList(range(count)))
+    expectedoutput = "MyList(\n" + ",\n".join("   %d" % i for i in range(count)) + ")"
+
+    nt.assert_equals(gotoutput, expectedoutput)