--- a/licenser/licenses.py	Wed Nov 23 14:29:17 2011 -0800
+++ b/licenser/licenses.py	Thu Nov 24 12:58:32 2011 -0800
@@ -48,74 +48,83 @@
 def hash_comments():
     pass
 
-type = {'py': hash_comments,
-        'sh': hash_comments,
-        'c':  asterisk_comments}
+suffixes = {'py': hash_comments,
+            'sh': hash_comments,
+            'c':  asterisk_comments}
 
 class License(object):
-  """Abstract base class for a license"""
+    """Abstract base class for a license"""
 
-  variables = [] # required variables
+    variables = [] # required variables
 
-  def __init__(self):
-    if self.template and not os.path.isabs(self.template):
-      self.template = os.path.join(os.path.dirname(__file__),
-                                   'licenses',
-                                   self.template)
-    assert os.path.exists(self.template)
+    def __init__(self):
+        if self.template:
+            if not os.path.isabs(self.template):
+                self.template = os.path.join(os.path.dirname(__file__),
+                                             'licenses',
+                                             self.template)
+            assert os.path.exists(self.template)
+        
+    def license(self):
+        return file(self.template).read()
 
-  def license(self):
-    return file(self.template).read()
+    def print_license(self):
+        print self.license()
 
-  def print_license(self):
-    print self.license()
+    def token(self):
+        """a token indicative of the license, by default the first line"""
+        return self.license.splitlines()[0].strip()
 
-  def has_license(filename):
-      """does the file already have a license?"""
-      raise NotImplementedError
+    def has_license(self, filename):
+        """does the file already have a license?"""
+        token = self.token()
+        for line in file(filename).readlines():
+            if token in line:
+                return True
+        return False
 
-  def __call__(self, directory, **kw):
-    variables = self.obtain_variables(**kw)
-    self.interpolate(directory, variables)
+    def __call__(self, directory, **kw):
+        variables = self.obtain_variables(**kw)
+        self.interpolate(directory, variables)
 
-  def obtain_variables(self, **kw):
-    for var in self.variables:
-      if var not in kw:
-        print 'Enter %s: ' % var,
-        kw[var] = raw_input()
-    self.pre(kw)
-    return kw
+    def obtain_variables(self, **kw):
+        for var in self.variables:
+            if var not in kw:
+                print 'Enter %s: ' % var,
+                kw[var] = raw_input()
+        self.pre(kw)
+        return kw
 
   def pre(self, variables):
-    """do anything that needs to be done before interpolation"""
+      """do anything that needs to be done with the variables before interpolation"""
 
   def interpolate_file(self, _file, variables):
 
-    # get the file lines
-    f = file(_file)
-    lines = [ i.rstrip() for i in f.readlines() ]
-    f.close()
-
-    # open the file for writing
-    f = file(_file, 'w')
+      # get the file lines
+      f = file(_file)
+      lines = [ i.rstrip() for i in f.readlines() ]
+      f.close()
+      
+      # open the file for writing
+      f = file(_file, 'w')
 
-    # print shebang if it exists
-    if lines[0].startswith('#!'):
-      shebang = lines.pop(0)
-      print >> f, shebang
-      print >> f
+      # print shebang if it exists
+      if lines[0].startswith('#!'):
+          shebang = lines.pop(0)
+          print >> f, shebang
+          print >> f
 
-    # print the license
-    g = self.license()
-    for line in g.splitlines():
-      line = line.rstrip()
-      _template = Template(line)
-      print >> f, '# %s' % _template.substitute(**variables)
-    g.close()
+      # print the license
+      g = self.license()
+      for line in g.splitlines():
+          line = line.rstrip()
+          _template = Template(line)
+          print >> f, '# %s' % _template.substitute(**variables)
+      g.close()
 
-    # print the rest of the file
-    for line in lines:
-      print >> f, line.rstrip()
+      # print the rest of the file
+      for line in lines:
+          print >> f, line.rstrip()
     f.close()
 
   def interpolate(self, directory, variables):

--- a/tests/doctest.txt	Wed Nov 23 14:29:17 2011 -0800
+++ b/tests/doctest.txt	Thu Nov 24 12:58:32 2011 -0800
@@ -1,11 +1,12 @@
 Test licenser
 ================
 
-The obligatory imports:
+The obligatory imports::
 
     >>> import licenser
-
-Run some tests.  This test will fail, please fix it:
+    >>> import os
 
-    >>> assert True == False
+Run some tests::
 
+    >>> assert os.path.exists(directory)
+

--- a/tests/test.py	Wed Nov 23 14:29:17 2011 -0800
+++ b/tests/test.py	Thu Nov 24 12:58:32 2011 -0800
@@ -6,10 +6,11 @@
 
 import doctest
 import os
+import shutil
 import sys
+import tempfile
 from optparse import OptionParser
 
-
 def run_tests(raise_on_error=False, report_first=False):
 
     # add results here
@@ -28,12 +29,21 @@
 
     # run the tests
     for test in tests:
+
+        # make a temporary directory for example files
+        tempdir = tempfile.mktemp()
+        shutil.copytree(os.path.join(directory, 'example'), tempdir)
+        doctest_args['extraglobs']['directory'] = tempdir
+        
         try:
             results[test] = doctest.testfile(test, **doctest_args)
         except doctest.DocTestFailure, failure:
             raise
         except doctest.UnexpectedException, failure:
             raise failure.exc_info[0], failure.exc_info[1], failure.exc_info[2]
+        finally:
+            # cleanup
+            shutil.rmtree(tempdir)
 
     return results