gtk: Give the TestCaseView a show-messages signal

This simply passes on the signal from the underlying factory to be used
in a higher up layer.

Signed-off-by: Anna Schumaker <anna@nowheycreamery.com>

tests/gtk/test_view.py

@@ -245,10 +245,17 @@ class TestTestCaseView(unittest.TestCase):
 
     def test_make_factory(self):
         """Test the do_make_factory() implementation."""
+        show_messages = unittest.mock.Mock()
+        self.view.connect("show-messages", show_messages)
+
         factory = self.view.do_make_factory("xunit-1")
         self.assertIsInstance(factory, xfstestsdb.gtk.row.ResultFactory)
         self.assertEqual(factory.xunit, "xunit-1")
 
+        factory.emit("show-messages", "testcase", "xunit", "stdout", "stderr")
+        show_messages.assert_called_with(self.view, "testcase", "xunit",
+                                         "stdout", "stderr")
+
 
 class TestSummaryView(unittest.TestCase):
     """Tests the SummaryView."""

xfstestsdb/gtk/view.py

@@ -148,9 +148,20 @@ class TestCaseView(XunitView):
 
         self.props.child.set_vexpand(True)
 
+    def __show_messages(self, factory: row.ResultFactory, testcase: str,
+                        xunit: str, stdout: str, stderr: str) -> None:
+        self.emit("show-messages", testcase, xunit, stdout, stderr)
+
     def do_make_factory(self, xunit: str) -> row.ResultFactory:
         """Make a new ResultFactory instance."""
-        return row.ResultFactory(xunit=xunit)
+        factory = row.ResultFactory(xunit=xunit)
+        factory.connect("show-messages", self.__show_messages)
+        return factory
+
+    @GObject.Signal(arg_types=(str, str, str, str))
+    def show_messages(self, testcase: str, xunit: str,
+                      stdout: str, stderr: str) -> None:
+        """Signal that the user wants to inspect stdout and stderr messages."""
 
 
 class SummaryView(XunitView):