tests: add repo __getitem__() tests

Author: radhermit

tests/repo/test_base.py

@@ -94,6 +94,14 @@ def test_contains(self, repo):
             with pytest.raises(TypeError):
                 assert obj in repo
 
+    def test_getitem(self, repo):
+        pkg = repo.create_pkg('cat/pkg-1')
+        assert pkg == repo['cat/pkg-1']
+
+        for obj in ('cat/pkg-2', Cpv('cat/pkg-3')):
+            with pytest.raises(KeyError):
+                repo[obj]
+
     def test_len(self, repo):
         # empty repo
         assert len(repo) == 0