Use the contexts

tests/drivers/test_raster_drivers.py

@@ -11,6 +11,22 @@
 METADATA_KEYS = ('bounds', 'range', 'mean', 'stdev', 'percentiles', 'metadata')
 
 
+@pytest.fixture
+def dynamic_non_writable_db(monkeypatch, driver_path, provider, raster_file):
+    from terracotta import drivers
+    db = drivers.get_driver(driver_path, provider=provider)
+    keys = ('some', 'keynames')
+
+    db.create(keys)
+    db.insert(['some', 'value'], str(raster_file), skip_metadata=True)
+
+    with monkeypatch.context() as m:
+        m.setattr(db.meta_store, "_WRITABLE", False)
+        yield
+
+    db.delete(['some', 'value'])
+
+
 @pytest.mark.parametrize('provider', DRIVERS)
 def test_insertion_and_retrieval(driver_path, provider, raster_file):
     from terracotta import drivers
@@ -147,16 +163,9 @@ def test_lazy_loading(driver_path, provider, raster_file):
 
 
 @pytest.mark.parametrize('provider', DRIVERS)
-def test_non_writable_lazy_loading(driver_path, provider, raster_file):
+def test_non_writable_lazy_loading(driver_path, provider, dynamic_non_writable_db):
     from terracotta import drivers
     db = drivers.get_driver(driver_path, provider=provider)
-    keys = ('some', 'keynames')
-
-    db.create(keys)
-    db.insert(['some', 'value'], str(raster_file), skip_metadata=True)
-
-    # Manually set the meta store to un-writable
-    db.meta_store._WRITABLE = False
 
     with pytest.raises(exceptions.DatabaseNotWritableError):
         db.get_metadata(['some', 'value'])