Added 18 more citation tests

Thanks @jakobgager for the tests-
http://nbviewer.ipython.org/gist/jakobgager/6859103

IPython/nbconvert/filters/tests/test_citation.py

@@ -17,7 +17,7 b' from nose.tools import assert_equal'
 # Tests
 #-----------------------------------------------------------------------------
 
-test_md = """
+test_md = {"""
 # My Heading
 
 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus ac magna non augue
@@ -32,9 +32,7 b' relations like 1<2 & 4>5.</p>'
 * One <cite data-cite="jdfreder">Jonathan</cite>.
 * Two <cite data-cite="carreau">Matthias</cite>.
 * Three <cite data-cite="ivanov">Paul</cite>.
-"""
-
-test_md_parsed = """
+""":  """
 # My Heading
 
 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus ac magna non augue
@@ -49,13 +47,106 b' relations like 1<2 & 4>5.</p>'
 * One \cite{jdfreder}.
 * Two \cite{carreau}.
 * Three \cite{ivanov}.
-"""
+""",
+
+# No citations
+r"""The quick brown fox jumps over the lazy dog.""": 
+r"""The quick brown fox jumps over the lazy dog.""",
+
+# Simple inline
+r"""Foo <cite data-cite=asdf>Text</cite> bar""":
+r"""Foo \cite{asdf} bar""",
+
+# Multiline
+r"""<cite data-cite=ewqr>Text
+</cite>Foo""":
+r"""\cite{ewqr}Foo""",
+
+# Nested tags
+r"""<div><div data-cite=Foo><div>Text</div></div></div> Bar""":
+r"""<div>\cite{Foo}</div> Bar""",
+
+# Including Maths
+r"""Foo $3*2*1$ <div data-cite=Foo>Text</div> Bar""":
+r"""Foo $3*2*1$ \cite{Foo} Bar""",
+
+# Missing end tag
+r"""<cite data-cite=asdf>Test Foo""":
+r"""\cite{asdf}""",
+
+r"""<cite data-cite=asdf><cite>Test Foo""":
+r"""\cite{asdf}""",
+
+r"""<cite data-cite=asdf><cite>Test</cite> Foo""":
+r"""\cite{asdf}""",
+
+# Multiple arguments
+r"""<cite width=qwer data-cite=asdf>Test</cite> Foo""":
+r"""\cite{asdf} Foo""",
+
+# Wrong capitalization
+r"""<CITE data-cite=asdf>Test</cite> Foo""":
+r"""\cite{asdf} Foo""",
+
+r"""<cite DATA-CITE=asdf>Test</cite> Foo""":
+r"""\cite{asdf} Foo""",
+
+# Wrong end tag
+r"""<asd data-cite=wer> ksjfs </asdf> sdf ds """:
+r"""\cite{wer}""",
+
+r"""<asd data-cite=wer>""":
+r"""\cite{wer}""",
+
+# Invalid tag names
+r"""<frog> <foo data-cite=wer></foo>""":
+r"""<frog> \cite{wer}""",
+
+# Non-nested tags
+r"""<strong> <h1> <cite data-cite=asdf></cite>Test</strong> Foo </h1>""":
+r"""<strong> <h1> \cite{asdf}Test</strong> Foo </h1>""",
+
+# LXML errors
+r"""Foo
+\begin{eqnarray}
+1 & <cite data-cite=bar>bar1</cite> \\
+3 & 4 \\
+\end{eqnarray}""":
+r"""Foo
+\begin{eqnarray}
+1 & \cite{bar} \\
+3 & 4 \\
+\end{eqnarray}""",
+
+r"""
+1<2 is true, but 3>4 is false.
+
+$1<2$ is true, but $3>4$ is false.
+
+1<2 it is even worse if it is alone in a line.""":
+r"""
+1<2 is true, but 3>4 is false.
+
+$1<2$ is true, but $3>4$ is false.
+
+1<2 it is even worse if it is alone in a line.""",
+
+r"""
+1 < 2 is true, but 3 > 4 is false
+
+$1 < 2$ is true, but $3 > 4$ is false
+
+1 < 2 it is even worse if it is alone in a line.
+""":
+r"""
+1 < 2 is true, but 3 > 4 is false
+
+$1 < 2$ is true, but $3 > 4$ is false
+
+1 < 2 it is even worse if it is alone in a line.
+"""}
 
 def test_citation2latex():
     """Are citations parsed properly?"""
-    try:
-        from lxml import html  #analysis:ignore
-    except ImportError:
-        assert_equal(test_md, citation2latex(test_md))
-    else:
-        assert_equal(test_md_parsed, citation2latex(test_md))
+    for input, output in test_md.items():
+        yield (assert_equal, citation2latex(input), output)