first add files

lib/sqlalchemy/dialects/sqlite/provision.py

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+import os
+import re
+
+from ... import exc
+from ...engine import url as sa_url
+from ...testing.provision import create_db
+from ...testing.provision import drop_db
+from ...testing.provision import follower_url_from_main
+from ...testing.provision import generate_driver_url
+from ...testing.provision import log
+from ...testing.provision import post_configure_engine
+from ...testing.provision import run_reap_dbs
+from ...testing.provision import stop_test_class_outside_fixtures
+from ...testing.provision import temp_table_keyword_args
+
+
+# TODO: I can't get this to build dynamically with pytest-xdist procs
+_drivernames = {"pysqlite", "aiosqlite", "pysqlcipher"}
+
+
+@generate_driver_url.for_db("sqlite")
+def generate_driver_url(url, driver, query_str):
+    if driver == "pysqlcipher" and url.get_driver_name() != "pysqlcipher":
+        if url.database:
+            url = url.set(database=url.database + ".enc")
+        url = url.set(password="test")
+    url = url.set(drivername="sqlite+%s" % (driver,))
+    try:
+        url.get_dialect()
+    except exc.NoSuchModuleError:
+        return None
+    else:
+        return url
+
+
+@follower_url_from_main.for_db("sqlite")
+def _sqlite_follower_url_from_main(url, ident):
+    url = sa_url.make_url(url)
+
+    if not url.database or url.database == ":memory:":
+        return url
+    else:
+
+        m = re.match(r"(.+?)\.(.+)$", url.database)
+        name, ext = m.group(1, 2)
+        drivername = url.get_driver_name()
+        return sa_url.make_url(
+            "sqlite+%s:///%s_%s.%s" % (drivername, drivername, ident, ext)
+        )
+
+
+@post_configure_engine.for_db("sqlite")
+def _sqlite_post_configure_engine(url, engine, follower_ident):
+    from sqlalchemy import event
+
+    @event.listens_for(engine, "connect")
+    def connect(dbapi_connection, connection_record):
+        # use file DBs in all cases, memory acts kind of strangely
+        # as an attached
+        if not follower_ident:
+            # note this test_schema.db gets created for all test runs.
+            # there's not any dedicated cleanup step for it.  it in some
+            # ways corresponds to the "test.test_schema" schema that's
+            # expected to be already present, so for now it just stays
+            # in a given checkout directory.
+            dbapi_connection.execute(
+                'ATTACH DATABASE "%s_test_schema.db" AS test_schema'
+                % (engine.driver,)
+            )
+        else:
+            dbapi_connection.execute(
+                'ATTACH DATABASE "%s_%s_test_schema.db" AS test_schema'
+                % (follower_ident, engine.driver)
+            )
+
+
+@create_db.for_db("sqlite")
+def _sqlite_create_db(cfg, eng, ident):
+    pass
+
+
+@drop_db.for_db("sqlite")
+def _sqlite_drop_db(cfg, eng, ident):
+    for path in [
+        "%s.db" % ident,
+        "%s_%s_test_schema.db" % (ident, eng.driver),
+    ]:
+        if os.path.exists(path):
+            log.info("deleting SQLite database file: %s" % path)
+            os.remove(path)
+
+
+@stop_test_class_outside_fixtures.for_db("sqlite")
+def stop_test_class_outside_fixtures(config, db, cls):
+    with db.connect() as conn:
+        files = [
+            row.file
+            for row in conn.exec_driver_sql("PRAGMA database_list")
+            if row.file
+        ]
+
+    if files:
+        db.dispose()
+        # some sqlite file tests are not cleaning up well yet, so do this
+        # just to make things simple for now
+        for file_ in files:
+            if file_ and os.path.exists(file_):
+                os.remove(file_)
+
+
+@temp_table_keyword_args.for_db("sqlite")
+def _sqlite_temp_table_keyword_args(cfg, eng):
+    return {"prefixes": ["TEMPORARY"]}
+
+
+@run_reap_dbs.for_db("sqlite")
+def _reap_sqlite_dbs(url, idents):
+    log.info("db reaper connecting to %r", url)
+
+    log.info("identifiers in file: %s", ", ".join(idents))
+    for ident in idents:
+        # we don't have a config so we can't call _sqlite_drop_db due to the
+        # decorator
+        for ext in ("db", "db.enc"):
+            for path in (
+                ["%s.%s" % (ident, ext)]
+                + [
+                    "%s_%s.%s" % (drivername, ident, ext)
+                    for drivername in _drivernames
+                ]
+                + [
+                    "%s_test_schema.%s" % (drivername, ext)
+                    for drivername in _drivernames
+                ]
+                + [
+                    "%s_%s_test_schema.%s" % (ident, drivername, ext)
+                    for drivername in _drivernames
+                ]
+            ):
+                if os.path.exists(path):
+                    log.info("deleting SQLite database file: %s" % path)
+                    os.remove(path)