Unit test session completion

tests/helpers/fixtures.py

@@ -225,6 +225,15 @@ def web_history_stub(stubs):
     objreg.delete('web-history')
 
 
+@pytest.yield_fixture
+def session_manager_stub(stubs):
+    """Fixture which provides a fake web-history object."""
+    stub = stubs.SessionManagerStub()
+    objreg.register('session-manager', stub)
+    yield stub
+    objreg.delete('session-manager')
+
+
 @pytest.fixture(scope='session')
 def stubs():
     """Provide access to stub objects useful for testing."""

tests/helpers/stubs.py

@@ -469,3 +469,14 @@ class HostBlockerStub:
 
     def __init__(self):
         self.blocked_hosts = set()
+
+
+class SessionManagerStub:
+
+    """Stub for the session-manager object."""
+
+    def __init__(self):
+        self.sessions = []
+
+    def list_sessions(self):
+        return self.sessions

tests/unit/completion/test_models.py

@@ -176,6 +176,14 @@ def test_url_completion(config_stub, web_history, quickmarks, bookmarks):
     ]
 
 
+def test_session_completion(session_manager_stub):
+    session_manager_stub.sessions = ['default', '1', '2']
+    actual = _get_completions(miscmodels.SessionCompletionModel())
+    assert actual == [
+        ("Sessions", [('default', '', ''), ('1', '', ''), ('2', '', '')])
+    ]
+
+
 def _get_completions(model):
     """Collect all the completion entries of a model, organized by category.