tests: update tests for the trimmed-down model

Rework the tests to account for the refactored staging actions.

Signed-off-by: David Aguilar <[email protected]>

Author: davvid

test/browse_model_test.py

@@ -19,7 +19,8 @@ def test_stage_paths_untracked(self):
         """Test stage_paths() with an untracked file."""
         core.makedirs('foo/bar')
         self.touch('foo/bar/baz')
-        self.model.stage_paths(['foo'])
+        gitcmds.add(['foo'])
+        self.model.update_file_status()
 
         self.assertTrue('foo/bar/baz' in self.model.staged)
         self.assertTrue('foo/bar/baz' not in self.model.modified)