diff --git a/dotdrop/templategen.py b/dotdrop/templategen.py
index 892702a..41cd40f 100644
--- a/dotdrop/templategen.py
+++ b/dotdrop/templategen.py
@@ -144,7 +144,7 @@ class Templategen:
             return self.generate_string(content)
         if isinstance(content, dict):
             return self.generate_dict(content)
-        raise UndefinedError(f'could not template {content}')
+        raise UndefinedException(f'could not template {content}')
 
     def add_tmp_vars(self, newvars=None):
         """add vars to the globals, make sure to call restore_vars"""
diff --git a/tests/test_misc.py b/tests/test_misc.py
index 483ca5d..79fb6fd 100644
--- a/tests/test_misc.py
+++ b/tests/test_misc.py
@@ -9,8 +9,108 @@ basic unittest for misc stuff
 # pylint: disable=W0212
 
 import unittest
+from unittest.mock import patch
 from dotdrop.profile import Profile
 from dotdrop.linktypes import LinkTypes
+from dotdrop.templategen import Templategen
+from dotdrop.exceptions import UndefinedException
+from jinja2 import TemplateNotFound
+from tests.helpers import create_random_file, \
+    get_tempdir, clean
+
+
+class TestTemplateGen(unittest.TestCase):
+    """test case"""
+
+    def test_misc(self):
+        """test misc"""
+        tmpl = Templategen()
+        self.assertFalse(tmpl.path_is_template('/abc'))
+        self.assertFalse(tmpl._is_template('/abc'))
+        tmpl._debug_dict('a', 'b')
+
+    def test_lodaer(self):
+        """test loading template"""
+        tmpl = Templategen()
+        with self.assertRaises(TemplateNotFound):
+            tmpl._template_loader('/abc')
+
+    def test_is_text(self):
+        """test is_text"""
+        self.assertTrue(Templategen._is_text('empty'))
+        self.assertTrue(Templategen._is_text('json'))
+        self.assertTrue(Templategen._is_text('javascript'))
+        self.assertTrue(Templategen._is_text('ecmascript'))
+        self.assertTrue(Templategen._is_text('text'))
+        self.assertFalse(Templategen._is_text('binary'))
+
+    def test_handle_bin_file(self):
+        """test handle binary file"""
+        tmpl = Templategen()
+
+        tmpdir = get_tempdir()
+        self.addCleanup(clean, tmpdir)
+        content = b'abc'
+        path, _ = create_random_file(tmpdir, content=content, binary=True)
+
+        cont = tmpl._handle_file(path)
+        self.assertEqual(content, cont)
+
+    def test_filetype(self):
+        """test using file instead of magic"""
+        oimport = __import__
+
+        def import_mock(name, *args):
+            if name == 'magic':
+                raise ImportError
+            return oimport(name, *args)
+
+        with patch('builtins.__import__',
+                   side_effect=import_mock):
+            tmpdir = get_tempdir()
+            self.addCleanup(clean, tmpdir)
+            content = 'abc'
+            path, _ = create_random_file(tmpdir, content=content)
+
+            tmpl = Templategen()
+            self.assertTrue('text' in tmpl._get_filetype(path))
+
+    def test_generate(self):
+        """test generate"""
+        tmpl = Templategen()
+        self.assertEqual(tmpl.generate('/abc'), '')
+
+        tmpdir = get_tempdir()
+        self.addCleanup(clean, tmpdir)
+        content = '{{@@ non-existing-var @@}}'
+        path, _ = create_random_file(tmpdir, content=content)
+        with self.assertRaises(UndefinedException):
+            tmpl.generate(path)
+
+        fakestring = None
+        self.assertEqual(tmpl.generate_string(fakestring), '')
+        fakestring = '{{@@ non-existing-var @@}}'
+        with self.assertRaises(UndefinedException):
+            tmpl.generate_string(fakestring)
+
+        fakedict = None
+        self.assertEqual(tmpl.generate_dict(fakedict), None)
+        fakedict = {'key': {
+            'subkey', fakestring,
+        }}
+        tmpl.generate_dict(fakedict)
+
+        with self.assertRaises(UndefinedException):
+            tmpl.generate_string_or_dict(2)
+
+        tmpdir2 = get_tempdir()
+        self.addCleanup(clean, tmpdir2)
+        adic = {}
+        path, _ = create_random_file(tmpdir, content='blah')
+        with self.assertRaises(NameError):
+            tmpl._load_path_to_dic(path, adic)
+
+        tmpl._load_funcs_to_dic(None, None)
 
 
 class TestLinkTypes(unittest.TestCase):