Add testcase for toctree

tests/util.py

@@ -13,7 +13,7 @@ import sys
 import tempfile
 from functools import wraps
 
-from six import StringIO
+from six import StringIO, string_types
 
 from nose import tools, SkipTest
 
@@ -94,14 +94,33 @@ def assert_startswith(thing, prefix):
         assert False, '%r does not start with %r' % (thing, prefix)
 
 
-def assert_node(node, cls=None, **kwargs):
+def assert_node(node, cls=None, xpath="", **kwargs):
     if cls:
-        assert isinstance(node, cls), '%r is not subclass of %r' % (node, cls)
+        if isinstance(cls, list):
+            assert_node(node, cls[0], xpath=xpath, **kwargs)
+            if cls[1:]:
+                if isinstance(cls[1], tuple):
+                    assert_node(node, cls[1], xpath=xpath, **kwargs)
+                else:
+                    assert len(node) == 1, \
+                        'The node%s has %d child nodes, not one' % (xpath, len(node))
+                    assert_node(node[0], cls[1:], xpath=xpath + "[0]", **kwargs)
+        elif isinstance(cls, tuple):
+            assert len(node) == len(cls), \
+                'The node%s has %d child nodes, not %r' % (xpath, len(node), len(cls))
+            for i, nodecls in enumerate(cls):
+                path = xpath + "[%d]" % i
+                assert_node(node[i], nodecls, xpath=path, **kwargs)
+        elif isinstance(cls, string_types):
+            assert node == cls, 'The node %r is not %r: %r' % (xpath, cls, node)
+        else:
+            assert isinstance(node, cls), \
+                'The node%s is not subclass of %r: %r' % (xpath, cls, node)
 
     for key, value in kwargs.items():
-        assert key in node, '%r does not have %r attribute' % (node, key)
+        assert key in node, 'The node%s does not have %r attribute: %r' % (xpath, key, node)
         assert node[key] == value, \
-            '%r[%s]: %r does not equals %r' % (node, key, node[key], value)
+            'The node%s[%s] is not %r: %r' % (xpath, key, value, node[key])
 
 
 try: