add the raises exception and use self.assertRaises to test for the ex…

…ception raised.

about_code_tool/genabout.py

@@ -204,7 +204,7 @@ def verify_license_files(self, input_list, project_dir):
             except Exception as e:
                 print(repr(e))
                 print("The input does not have the 'license_text_file' key which is required.")
-                sys.exit(errno.EINVAL)
+                raise Exception(repr(e))
         return license_files_list
 
     def request_license_data(self, url, username, api_key, license_key):
@@ -595,6 +595,8 @@ def main(parser, options, args):
                 copy_license_path += '/'
             project_parent_dir = dirname(copy_license_path)
             license_list = gen.verify_license_files(input_list, project_parent_dir)
+            if not license_list:
+                print("None of the 'license_text_file' is found. '--copy_license' is ignored.")
             gen.copy_license_files(output_path, license_list, project_parent_dir)
 
     if extract_license:

about_code_tool/tests/test_genabout.py

@@ -14,13 +14,13 @@
 #  limitations under the License.
 # =============================================================================
 
-from __future__ import print_function
-from __future__ import with_statement
+from __future__ import print_function, with_statement
 
 import os
-import unittest
-import tempfile
 import shutil
+import tempfile
+import unittest
+
 from os.path import abspath, dirname, join
 
 from about_code_tool import genabout
@@ -255,6 +255,13 @@ def test_verify_license_files_not_exist(self):
         self.assertTrue(len(gen.warnings) == 1, "Should return 1 warning.")
         self.assertFalse(gen.errors, "No errors should be returned.")
 
+    def test_verify_license_files_no_key(self):
+        gen = genabout.GenAbout()
+        input_list = [{'version': '0.8.1', 'about_file': 'about.py.ABOUT',
+                          'name': 'ABOUT tool', 'about_resource': '.'}]
+        path = '.'
+        self.assertRaises(Exception, gen.verify_license_files, input_list, path)
+
     def test_gen_license_list_license_text_file_no_value(self):
         gen = genabout.GenAbout()
         input_list = {'about_file': '/tmp/3pp/opensans/', 'name': 'OpenSans Fonts',