def test_extract_titles(self):
""" Test the ``extract_titles`` utility. """
document_tree = RootTreeNode()
document_tree.new_child(None, TextTreeNode)
a1 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a2 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a3 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a4 = document_tree.new_child('title', generate_title_cls(1))
titles = extract_titles(document_tree)
self.assertEqual([a1, a2, a3, a4], titles)
def test_extract_titles(self):
""" Test the ``extract_titles`` utility. """
document_tree = RootTreeNode()
document_tree.new_child(None, TextTreeNode)
a1 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a2 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a3 = document_tree.new_child('title', generate_title_cls(1))
document_tree.new_child(None, TextTreeNode)
a4 = document_tree.new_child('title', generate_title_cls(1))
titles = extract_titles(document_tree)
self.assertEqual([a1, a2, a3, a4], titles)
def test_render_html_without_permalink(self):
""" Test the ``render_html`` when the "id" attribute is not set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1', generate_title_cls(1), attrs={})
output_result = tree_node.render_html('Hello World!')
expected_result = '<h1>Hello World!</h1>\n'
self.assertEqual(expected_result, output_result)
def test_constructor(self):
""" Test if the constructor set the title level and HTML tag name correctly. """
for level in range(1, 7):
cls = generate_title_cls(level)
self.assertEqual(cls.title_level, level)
self.assertEqual(cls.html_tagname, 'h%d' % level)
self.assertEqual('h%d' % level, cls.canonical_tag_name)
def test_generator_cls(self):
""" Test the constructor function. """
cls = generate_title_cls(1)
self.assertEqual(1, cls.title_level)
self.assertEqual('h1', cls.html_tagname)
self.assertEqual('h1', cls.canonical_tag_name)
self.assertEqual((), cls.alias_tag_names)
def test_render_text_with_permalink(self):
""" Test the ``render_text`` when the "id" attribute is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1', generate_title_cls(1), attrs={'id': 'test'})
output_result = tree_node.render_text('Hello World!')
expected_result = '#[test] Hello World!\n'
self.assertEqual(expected_result, output_result)
def test_make_auto_title_ids(self):
""" Test the ``make_auto_title_ids`` utility. """
document_tree = RootTreeNode()
document_tree.new_child(None, TextTreeNode)
a1 = document_tree.new_child('title', generate_title_cls(1))
a1.new_child(None, TextTreeNode, content='Title 1')
a2 = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'title-2-custom'})
a2.new_child(None, TextTreeNode, content='Title 2')
a3 = document_tree.new_child('title', generate_title_cls(1))
a3.new_child(None, TextTreeNode, content='Title 3')
a4 = document_tree.new_child('title', generate_title_cls(1))
make_auto_title_ids(document_tree)
self.assertEqual('title-1', a1.get_permalink_slug())
self.assertEqual('title-2-custom', a2.get_permalink_slug())
self.assertEqual('title-3', a3.get_permalink_slug())
self.assertEqual('', a4.get_permalink_slug())
def test_generator_cls(self):
""" Test the constructor function. """
cls = generate_title_cls(1)
self.assertEqual(1, cls.title_level)
self.assertEqual('h1', cls.html_tagname)
self.assertEqual('h1', cls.canonical_tag_name)
self.assertEqual((), cls.alias_tag_names)
def test_constructor(self):
""" Test if the constructor set the title level and HTML tag name correctly. """
for level in range(1, 7):
cls = generate_title_cls(level)
self.assertEqual(cls.title_level, level)
self.assertEqual(cls.html_tagname, 'h%d' % level)
self.assertEqual('h%d' % level, cls.canonical_tag_name)
def test_get_permalink_slug_call_slugify(self):
""" Test the ``get_permalink_slug`` method call the ``slugify`` function. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1', generate_title_cls(1), attrs={'id': 'test'})
with unittest.mock.patch('skcode.tags.titles.slugify') as mock_slugify:
tree_node.get_permalink_slug()
mock_slugify.assert_called_once_with('test')
def test_get_permalink_slug_with_id_set(self):
""" Test the ``get_permalink_slug`` when the "id" attribute is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1',
generate_title_cls(1),
attrs={'id': 'test'})
permalink_slug = tree_node.get_permalink_slug()
self.assertEqual('test', permalink_slug)
def test_get_permalink_slug_without_value(self):
""" Test the ``get_permalink_slug`` when no value is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1',
generate_title_cls(1),
attrs={})
permalink_slug = tree_node.get_permalink_slug()
self.assertEqual('', permalink_slug)
def test_make_auto_title_ids(self):
""" Test the ``make_auto_title_ids`` utility. """
document_tree = RootTreeNode()
document_tree.new_child(None, TextTreeNode)
a1 = document_tree.new_child('title', generate_title_cls(1))
a1.new_child(None, TextTreeNode, content='Title 1')
a2 = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'title-2-custom'})
a2.new_child(None, TextTreeNode, content='Title 2')
a3 = document_tree.new_child('title', generate_title_cls(1))
a3.new_child(None, TextTreeNode, content='Title 3')
a4 = document_tree.new_child('title', generate_title_cls(1))
make_auto_title_ids(document_tree)
self.assertEqual('title-1', a1.get_permalink_slug())
self.assertEqual('title-2-custom', a2.get_permalink_slug())
self.assertEqual('title-3', a3.get_permalink_slug())
self.assertEqual('', a4.get_permalink_slug())
def test_render_html_with_permalink(self):
""" Test the ``render_html`` when the "id" attribute is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1',
generate_title_cls(1),
attrs={'id': 'test'})
output_result = tree_node.render_html('Hello World!')
expected_result = '<h1><a id="test">Hello World!</a></h1>\n'
self.assertEqual(expected_result, output_result)
def test_render_text_without_permalink(self):
""" Test the ``render_text`` when the "id" attribute is not set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1',
generate_title_cls(1),
attrs={})
output_result = tree_node.render_text('Hello World!')
expected_result = '# Hello World!\n'
self.assertEqual(expected_result, output_result)
def test_get_permalink_slug_call_slugify(self):
""" Test the ``get_permalink_slug`` method call the ``slugify`` function. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1',
generate_title_cls(1),
attrs={'id': 'test'})
with unittest.mock.patch('skcode.tags.titles.slugify') as mock_slugify:
tree_node.get_permalink_slug()
mock_slugify.assert_called_once_with('test')
def test_get_permalink_slug_with_id_and_tagname_set(self):
""" Test the ``get_permalink_slug`` when the tag name and "id" attribute is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1', generate_title_cls(1), attrs={'h1': 'test', 'id': 'test2'})
permalink_slug = tree_node.get_permalink_slug()
self.assertEqual('test', permalink_slug)
def test_make_titles_hierarchy(self):
""" Test the ``make_titles_hierarchy`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title', generate_title_cls(3))
b = document_tree.new_child('title', generate_title_cls(4))
c = document_tree.new_child('title', generate_title_cls(1))
d = document_tree.new_child('title', generate_title_cls(2))
e = document_tree.new_child('title', generate_title_cls(3))
f = document_tree.new_child('title', generate_title_cls(2))
g = document_tree.new_child('title', generate_title_cls(3))
h = document_tree.new_child('title', generate_title_cls(1))
i = document_tree.new_child('title', generate_title_cls(2))
j = document_tree.new_child('title', generate_title_cls(1))
k = document_tree.new_child('title', generate_title_cls(1))
l = document_tree.new_child('title', generate_title_cls(3))
m = document_tree.new_child('title', generate_title_cls(4))
n = document_tree.new_child('title', generate_title_cls(2))
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
self.assertEqual([(a, [(b, [])]), (c, [(d, [(e, [])]),
(f, [(g, [])])]),
(h, [(i, [])]), (j, []),
(k, [(l, [(m, [])]), (n, [])])], titles_hierarchy)
def test_render_titles_hierarchy_html(self):
""" Test the ``render_titles_hierarchy_text`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title a'})
a.new_child(None, TextTreeNode, content='Title a')
b = document_tree.new_child('title',
generate_title_cls(4),
attrs={'id': 'Title b'})
b.new_child(None, TextTreeNode, content='Title b')
c = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title c'})
c.new_child(None, TextTreeNode, content='Title c')
d = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title d'})
d.new_child(None, TextTreeNode, content='Title d')
e = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title e'})
e.new_child(None, TextTreeNode, content='Title e')
f = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title f'})
f.new_child(None, TextTreeNode, content='Title f')
g = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title g'})
g.new_child(None, TextTreeNode, content='Title g')
h = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title h'})
h.new_child(None, TextTreeNode, content='Title h')
i = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title i'})
i.new_child(None, TextTreeNode, content='Title i')
j = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title j'})
j.new_child(None, TextTreeNode, content='Title j')
k = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title k'})
k.new_child(None, TextTreeNode, content='Title k')
l = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title l'})
l.new_child(None, TextTreeNode, content='Title l')
m = document_tree.new_child('title',
generate_title_cls(4),
attrs={'id': 'Title m'})
m.new_child(None, TextTreeNode, content='Title m')
n = document_tree.new_child('title', generate_title_cls(2))
n.new_child(None, TextTreeNode, content='Title n')
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
output = render_titles_hierarchy_html(titles_hierarchy)
expected_output = """<ul class="titles-summary">
<li class="titles-summary-entry">
<a href="#title-a" class="titles-summary-link">Title a</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-b" class="titles-summary-link">Title b</a>
</li>
</ul>
</li>
<li class="titles-summary-entry">
<a href="#title-c" class="titles-summary-link">Title c</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-d" class="titles-summary-link">Title d</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-e" class="titles-summary-link">Title e</a>
</li>
</ul>
</li>
<li class="titles-summary-entry">
<a href="#title-f" class="titles-summary-link">Title f</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-g" class="titles-summary-link">Title g</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="titles-summary-entry">
<a href="#title-h" class="titles-summary-link">Title h</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-i" class="titles-summary-link">Title i</a>
</li>
</ul>
</li>
<li class="titles-summary-entry">
<a href="#title-j" class="titles-summary-link">Title j</a>
</li>
<li class="titles-summary-entry">
<a href="#title-k" class="titles-summary-link">Title k</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-l" class="titles-summary-link">Title l</a>
<ul class="titles-summary-subentry">
<li class="titles-summary-entry">
<a href="#title-m" class="titles-summary-link">Title m</a>
</li>
</ul>
</li>
<li class="titles-summary-entry">
<a href="#" class="titles-summary-link">Title n</a>
</li>
</ul>
</li>
</ul>"""
self.assertEqual(expected_output, output)
def test_render_titles_hierarchy_html_custom_class(self):
""" Test the ``render_titles_hierarchy_html`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title a'})
a.new_child(None, TextTreeNode, content='Title a')
b = document_tree.new_child('title', generate_title_cls(4), attrs={'id': 'Title b'})
b.new_child(None, TextTreeNode, content='Title b')
c = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title c'})
c.new_child(None, TextTreeNode, content='Title c')
d = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title d'})
d.new_child(None, TextTreeNode, content='Title d')
e = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title e'})
e.new_child(None, TextTreeNode, content='Title e')
f = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title f'})
f.new_child(None, TextTreeNode, content='Title f')
g = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title g'})
g.new_child(None, TextTreeNode, content='Title g')
h = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title h'})
h.new_child(None, TextTreeNode, content='Title h')
i = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title i'})
i.new_child(None, TextTreeNode, content='Title i')
j = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title j'})
j.new_child(None, TextTreeNode, content='Title j')
k = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title k'})
k.new_child(None, TextTreeNode, content='Title k')
l = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title l'})
l.new_child(None, TextTreeNode, content='Title l')
m = document_tree.new_child('title', generate_title_cls(4), attrs={'id': 'Title m'})
m.new_child(None, TextTreeNode, content='Title m')
n = document_tree.new_child('title', generate_title_cls(2))
n.new_child(None, TextTreeNode, content='Title n')
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
output = render_titles_hierarchy_html(titles_hierarchy,
root_ul_class_name='custom_summary',
li_class_name='custom_summary-entry',
a_class_name='custom_summary-link',
ul_class_name='custom_summary-subentry')
expected_output = """<ul class="custom_summary">
<li class="custom_summary-entry">
<a href="#title-a" class="custom_summary-link">Title a</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-b" class="custom_summary-link">Title b</a>
</li>
</ul>
</li>
<li class="custom_summary-entry">
<a href="#title-c" class="custom_summary-link">Title c</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-d" class="custom_summary-link">Title d</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-e" class="custom_summary-link">Title e</a>
</li>
</ul>
</li>
<li class="custom_summary-entry">
<a href="#title-f" class="custom_summary-link">Title f</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-g" class="custom_summary-link">Title g</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="custom_summary-entry">
<a href="#title-h" class="custom_summary-link">Title h</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-i" class="custom_summary-link">Title i</a>
</li>
</ul>
</li>
<li class="custom_summary-entry">
<a href="#title-j" class="custom_summary-link">Title j</a>
</li>
<li class="custom_summary-entry">
<a href="#title-k" class="custom_summary-link">Title k</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-l" class="custom_summary-link">Title l</a>
<ul class="custom_summary-subentry">
<li class="custom_summary-entry">
<a href="#title-m" class="custom_summary-link">Title m</a>
</li>
</ul>
</li>
<li class="custom_summary-entry">
<a href="#" class="custom_summary-link">Title n</a>
</li>
</ul>
</li>
</ul>"""
self.assertEqual(expected_output, output)
def test_render_titles_hierarchy_text(self):
""" Test the ``render_titles_hierarchy_text`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title a'})
a.new_child(None, TextTreeNode, content='Title a')
b = document_tree.new_child('title', generate_title_cls(4), attrs={'id': 'Title b'})
b.new_child(None, TextTreeNode, content='Title b')
c = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title c'})
c.new_child(None, TextTreeNode, content='Title c')
d = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title d'})
d.new_child(None, TextTreeNode, content='Title d')
e = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title e'})
e.new_child(None, TextTreeNode, content='Title e')
f = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title f'})
f.new_child(None, TextTreeNode, content='Title f')
g = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title g'})
g.new_child(None, TextTreeNode, content='Title g')
h = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title h'})
h.new_child(None, TextTreeNode, content='Title h')
i = document_tree.new_child('title', generate_title_cls(2), attrs={'id': 'Title i'})
i.new_child(None, TextTreeNode, content='Title i')
j = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title j'})
j.new_child(None, TextTreeNode, content='Title j')
k = document_tree.new_child('title', generate_title_cls(1), attrs={'id': 'Title k'})
k.new_child(None, TextTreeNode, content='Title k')
l = document_tree.new_child('title', generate_title_cls(3), attrs={'id': 'Title l'})
l.new_child(None, TextTreeNode, content='Title l')
m = document_tree.new_child('title', generate_title_cls(4), attrs={'id': 'Title m'})
m.new_child(None, TextTreeNode, content='Title m')
n = document_tree.new_child('title', generate_title_cls(2))
n.new_child(None, TextTreeNode, content='Title n')
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
output = render_titles_hierarchy_text(titles_hierarchy)
expected_output = """# Title a
## Title b
# Title c
## Title d
### Title e
## Title f
### Title g
# Title h
## Title i
# Title j
# Title k
## Title l
### Title m
## Title n"""
self.assertEqual(expected_output, output)
def test_make_titles_hierarchy(self):
""" Test the ``make_titles_hierarchy`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title', generate_title_cls(3))
b = document_tree.new_child('title', generate_title_cls(4))
c = document_tree.new_child('title', generate_title_cls(1))
d = document_tree.new_child('title', generate_title_cls(2))
e = document_tree.new_child('title', generate_title_cls(3))
f = document_tree.new_child('title', generate_title_cls(2))
g = document_tree.new_child('title', generate_title_cls(3))
h = document_tree.new_child('title', generate_title_cls(1))
i = document_tree.new_child('title', generate_title_cls(2))
j = document_tree.new_child('title', generate_title_cls(1))
k = document_tree.new_child('title', generate_title_cls(1))
l = document_tree.new_child('title', generate_title_cls(3))
m = document_tree.new_child('title', generate_title_cls(4))
n = document_tree.new_child('title', generate_title_cls(2))
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
self.assertEqual([
(a, [
(b, [])
]),
(c, [
(d, [
(e, [])
]),
(f, [
(g, [])
])
]),
(h, [
(i, [])
]),
(j, []),
(k, [
(l, [
(m, [])
]), (n, [])
])
], titles_hierarchy)
def test_render_titles_hierarchy_text(self):
""" Test the ``render_titles_hierarchy_text`` utility. """
document_tree = RootTreeNode()
a = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title a'})
a.new_child(None, TextTreeNode, content='Title a')
b = document_tree.new_child('title',
generate_title_cls(4),
attrs={'id': 'Title b'})
b.new_child(None, TextTreeNode, content='Title b')
c = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title c'})
c.new_child(None, TextTreeNode, content='Title c')
d = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title d'})
d.new_child(None, TextTreeNode, content='Title d')
e = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title e'})
e.new_child(None, TextTreeNode, content='Title e')
f = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title f'})
f.new_child(None, TextTreeNode, content='Title f')
g = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title g'})
g.new_child(None, TextTreeNode, content='Title g')
h = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title h'})
h.new_child(None, TextTreeNode, content='Title h')
i = document_tree.new_child('title',
generate_title_cls(2),
attrs={'id': 'Title i'})
i.new_child(None, TextTreeNode, content='Title i')
j = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title j'})
j.new_child(None, TextTreeNode, content='Title j')
k = document_tree.new_child('title',
generate_title_cls(1),
attrs={'id': 'Title k'})
k.new_child(None, TextTreeNode, content='Title k')
l = document_tree.new_child('title',
generate_title_cls(3),
attrs={'id': 'Title l'})
l.new_child(None, TextTreeNode, content='Title l')
m = document_tree.new_child('title',
generate_title_cls(4),
attrs={'id': 'Title m'})
m.new_child(None, TextTreeNode, content='Title m')
n = document_tree.new_child('title', generate_title_cls(2))
n.new_child(None, TextTreeNode, content='Title n')
titles = [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
titles_hierarchy = make_titles_hierarchy(titles)
output = render_titles_hierarchy_text(titles_hierarchy)
expected_output = """# Title a
## Title b
# Title c
## Title d
### Title e
## Title f
### Title g
# Title h
## Title i
# Title j
# Title k
## Title l
### Title m
## Title n"""
self.assertEqual(expected_output, output)
def test_get_permalink_slug_without_value(self):
""" Test the ``get_permalink_slug`` when no value is set. """
root_tree_node = RootTreeNode()
tree_node = root_tree_node.new_child('h1', generate_title_cls(1), attrs={})
permalink_slug = tree_node.get_permalink_slug()
self.assertEqual('', permalink_slug)
