1 files changed, 117 insertions, 0 deletions
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..d07ae7d
--- /dev/null
+++ b/tests/__init__.py
@@ -0,0 +1,117 @@
+import os
+import markdown
+import codecs
+import difflib
+import nose
+import util 
+from plugins import HtmlOutput, Markdown
+try:
+    import tidy
+except ImportError:
+    tidy = None
+
+
+test_dir = os.path.abspath(os.path.dirname(__file__))
+
+def relpath(path, start=test_dir):
+    """ reimplement relpath for python 2.3-2.5 from 2.6 """
+    if not path:
+        raise ValueError('no path secified')
+    start_list = os.path.abspath(start).split(os.path.sep)
+    path_list = os.path.abspath(path).split(os.path.sep)
+    # Work out how much of the filepath is shared by start and path.
+    i = len(os.path.commonprefix([start_list, path_list]))
+    rel_list = [os.path.pardir] * (len(start_list)-i) + path_list[i:]
+    if not rel_list:
+        return test_dir
+    return os.path.join(*rel_list)
+
+def get_section(file, config):
+    """ Get name of config section for given file. """
+    filename = os.path.basename(file)
+    if config.has_section(filename):
+        return filename
+    else:
+        return 'DEFAULT'
+
+def get_args(file, config):
+    """ Get args to pass to markdown from config for a given file. """
+    args = {}
+    section = get_section(file, config)
+    for key in ['extensions', 'safe_mode', 'output_format']:
+        args[key] = config.get(section, key)
+    return args
+
+def normalize(text):
+    """ Normalize whitespace for a string of html using tidy. """
+    return str(tidy.parseString(text.encode('utf-8'), 
+                                    drop_empty_paras=0,
+                                    fix_backslash=0,
+                                    fix_bad_comments=0,
+                                    fix_uri=0,
+                                    join_styles=0,
+                                    lower_literals=0,
+                                    merge_divs=0,
+                                    output_xhtml=1,
+                                    quote_ampersand=0,
+                                    show_body_only=1,
+                                    char_encoding='utf8',
+                                    newline='LF')).decode('string-escape')
+
+class CheckSyntax(object):
+    def __init__(self, description=None):
+        if description:
+            self.description = 'TestSyntax: "%s"' % description
+
+    def __call__(self, file, config):
+        """ Compare expected output to actual output and report result. """
+        cfg_section = get_section(file, config)
+        if config.getboolean(cfg_section, 'skip'):
+            raise nose.plugins.skip.SkipTest, 'Test skipped per config.'
+        input_file = file + config.get(cfg_section, 'input_ext')
+        input = codecs.open(input_file, encoding="utf-8").read()
+        output_file = file + config.get(cfg_section, 'output_ext') 
+        expected_output = codecs.open(output_file, encoding="utf-8").read()
+        output = markdown.markdown(input, **get_args(file, config))
+        if tidy and config.getboolean(cfg_section, 'normalize'):
+            # Normalize whitespace before comparing.
+            expected_output = normalize(expected_output)
+            output = normalize(output)
+        elif config.getboolean(cfg_section, 'normalize'):
+            # Tidy is not available. Skip this test.
+            raise nose.plugins.skip.SkipTest, 'Test skipped. Tidy not available in system.'
+        diff = [l for l in difflib.unified_diff(expected_output.splitlines(True),
+                                                output.splitlines(True), 
+                                                output_file, 
+                                                'actual_output.html', 
+                                                n=3)]
+        if diff:
+            raise util.MarkdownSyntaxError('Output from "%s" failed to match expected '
+                                           'output.\n\n%s' % (input_file, ''.join(diff)))
+
+def TestSyntax():
+    for dir_name, sub_dirs, files in os.walk(test_dir):
+        # Get dir specific config settings.
+        config = util.CustomConfigParser({'extensions': '', 
+                                          'safe_mode': False,
+                                          'output_format': 'xhtml1',
+                                          'normalize': '0',
+                                          'skip': '0',
+                                          'input_ext': '.txt',
+                                          'output_ext': '.html'})
+        config.read(os.path.join(dir_name, 'test.cfg'))
+        # Loop through files and generate tests.
+        for file in files:
+            root, ext = os.path.splitext(file)
+            if ext == config.get(get_section(file, config), 'input_ext'):
+                path = os.path.join(dir_name, root)
+                check_syntax = CheckSyntax(description=relpath(path, test_dir))
+                yield check_syntax, path, config
+
+def run():
+    nose.main(addplugins=[HtmlOutput(), Markdown()])
+
+# Hack to make nose run with extensions. Once extensions can be added from
+# setup.cfg, the below line can be removed. 
+# See nose [Issue 271](http://code.google.com/p/python-nose/issues/detail?id=271)
+run()