Documentation and tests for db.is_mutable

docs/internals.rst

@@ -480,6 +480,12 @@ The ``Database`` class also provides properties and methods for introspecting th
 ``db.mtime_ns`` - integer or None
     The last modification time of the database file in nanoseconds since the epoch. ``None`` for ``:memory:`` databases.
 
+``db.is_mutable`` - boolean
+    Is this database mutable, and allowed to accept writes?
+
+``db.is_memory`` - boolean
+    Is this database an in-memory database?
+
 ``await db.table_exists(table)`` - boolean
     Check if a table called ``table`` exists.
 

tests/test_internals_database.py

@@ -213,4 +213,10 @@ async def test_mtime_ns(db):
 
 def test_mtime_ns_is_none_for_memory(app_client):
     memory_db = Database(app_client.ds, is_memory=True)
+    assert memory_db.is_memory is True
     assert None is memory_db.mtime_ns
+
+
+def test_is_mutable(app_client):
+    assert Database(app_client.ds, is_memory=True, is_mutable=True).is_mutable is True
+    assert Database(app_client.ds, is_memory=True, is_mutable=False).is_mutable is False