Minimum viable product

tests/test_db.py

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+import sqlite3
+
+import pytest
+from flaskr.db import get_db
+
+def test_get_close_db(app):
+    with app.app_context():
+        db = get_db()
+        assert db is get_db()
+
+    with pytest.raises(sqlite3.ProgrammingError) as e:
+        db.execute('SELECT 1')
+
+    assert 'closed' in str(e.value)
+
+    def test_init_db():
+        class Recorder(object):
+            called = False
+
+        def fake_init_db():
+            Recorder.called = True
+
+        monkeypatch.setattr('flaskr.db.init_db', fake_init_db)
+        result = runner.invoke(args=['init-db'])
+        assert 'Initialized' in result.output
+        assert Recorder.called