Added warnings for zero test, except for when doing --compile. Closes #…

…99.

vunit/test/acceptance/test_external_run_scripts.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 #
-# Copyright (c) 2015, Lars Asplund lars.anders.asplund@gmail.com
+# Copyright (c) 2015-2016, Lars Asplund lars.anders.asplund@gmail.com
 
 """
 Verify that all external run scripts work correctly
@@ -37,10 +37,10 @@ def test_verilog_uart_example_project(self):
         self.check(join(ROOT, "examples", "verilog", "uart", "run.py"))
 
     def test_vhdl_logging_example_project(self):
-        self.check(join(ROOT, "examples", "vhdl", "logging", "compile.py"))
+        self.check(join(ROOT, "examples", "vhdl", "logging", "compile.py"), args=["--compile"])
 
     def test_vhdl_check_example_project(self):
-        self.check(join(ROOT, "examples", "vhdl", "check", "compile.py"))
+        self.check(join(ROOT, "examples", "vhdl", "check", "compile.py"), args=["--compile"])
 
     def test_vhdl_generate_tests_example_project(self):
         self.check(join(ROOT, "examples", "vhdl", "generate_tests", "run.py"))

vunit/test/unit/test_ui.py

@@ -287,13 +287,7 @@ def side_effect():
         pre_config.side_effect = side_effect
 
         obj.add_config(name="", pre_config=pre_config)
-        try:
-            ui.main()
-        except SystemExit as exc:
-            if retval is True:
-                self.assertEqual(exc.code, 0)
-            else:
-                self.assertEqual(exc.code, 1)
+        self._run_main(ui, 0 if retval else 1)
 
         pre_config.assert_has_calls([call()])
 
@@ -304,17 +298,46 @@ def test_entity_has_pre_config(self):
     def test_test_has_pre_config(self):
         self._test_pre_config_helper(True, test_not_entity=False)
 
+    @mock.patch("vunit.ui.LOGGER", autospec=True)
+    def test_warning_on_no_tests(self, logger):
+        ui = self._create_ui("--compile")
+        self._run_main(ui)
+        self.assertEqual(logger.warning.mock_calls, [])
+        logger.reset_mock()
+
+        ui = self._create_ui("--list")
+        self._run_main(ui)
+        self.assertEqual(len(logger.warning.mock_calls), 1)
+        self.assertTrue("found no test benches" in str(logger.warning.mock_calls))
+        logger.reset_mock()
+
+        ui = self._create_ui()
+        self._run_main(ui)
+        self.assertEqual(len(logger.warning.mock_calls), 1)
+        self.assertTrue("found no test benches" in str(logger.warning.mock_calls))
+        logger.reset_mock()
+
     def _create_ui(self, *args):
         """ Create an instance of the VUnit public interface class """
         ui = VUnit.from_argv(argv=["--output-path=%s" % self._output_path,
-                                   "--clean"] + list(args))
+                                   "--clean"] + list(args),
+                             compile_builtins=False)
         ui.add_library('lib')
 
         factory = MockSimulatorFactory(self._output_path)
         self.mocksim = factory.mocksim
         ui._simulator_factory = factory  # pylint: disable=protected-access
         return ui
 
+    def _run_main(self, ui, code=0):
+        """
+        Run ui.main and expect exit code
+        """
+        try:
+            ui.main()
+        except SystemExit as exc:
+            self.assertEqual(exc.code, code)
+
     def create_entity_file(self, idx=0, file_suffix='.vhd'):
         """
         Create and a temporary file containing the same source code

vunit/test_list.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 #
-# Copyright (c) 2014-2015, Lars Asplund lars.anders.asplund@gmail.com
+# Copyright (c) 2014-2016, Lars Asplund lars.anders.asplund@gmail.com
 
 """
 Functionality to handle lists of test suites and filtering of them
@@ -35,6 +35,15 @@ def keep_matches(self, test_filter):
         self._test_suites = [test for test in self._test_suites
                              if test.keep_matches(test_filter)]
 
+    def num_tests(self):
+        """
+        Return the number of tests within
+        """
+        num_tests = 0
+        for test_suite in self:
+            num_tests += len(test_suite.test_cases)
+        return num_tests
+
     def __iter__(self):
         return iter(self._test_suites)
 

vunit/test_scanner.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 #
-# Copyright (c) 2014-2015, Lars Asplund lars.anders.asplund@gmail.com
+# Copyright (c) 2014-2016, Lars Asplund lars.anders.asplund@gmail.com
 
 """
 Functionality to automatically create test suites from a project
@@ -269,7 +269,10 @@ def find_pragmas(self, code, file_name):
 
 
 def tb_filter(entity):
-    """ Filter entities with file name tb_* and entity_name tb_* """
+    """
+    Filters entities with both file name and entity name matching tb_* or *_tb.
+    """
+    # Above docstring can show up in ui.py warnings
     file_ok = basename(entity.file_name).startswith("tb_") or splitext(basename(entity.file_name))[0].endswith("_tb")
     entity_ok = entity.name.startswith("tb_") or entity.name.endswith("_tb")
 

vunit/ui.py

@@ -432,12 +432,11 @@ def _main_list_only(self):
         """
         simulator_if = None
         test_suites = self._create_tests(simulator_if)
-        num_tests = 0
+
         for test_suite in test_suites:
             for name in test_suite.test_cases:
                 print(name)
-                num_tests += 1
-        print("Listed %i tests" % num_tests)
+        print("Listed %i tests" % test_suites.num_tests())
         return True
 
     def _main_compile_only(self):
@@ -488,6 +487,11 @@ def _create_tests(self, simulator_if):
         scanner = TestScanner(simulator_if,
                               self._configuration)
         test_list = scanner.from_project(self._project, entity_filter=self._tb_filter)
+
+        if test_list.num_tests() == 0:
+            LOGGER.warning("Test scanner found no test benches using current filter rule:\n%s",
+                           self._tb_filter.__doc__)
+
         test_list.keep_matches(self._test_filter)
         return test_list