You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: alter_changefeed_test.go
    path of file: ./repos/cockroach/pkg/ccl/changefeedccl
    
    the code of the file until where you have to start completion: // Copyright 2022 The Cockroach Authors.
//
// Licensed as a CockroachDB Enterprise file under the Cockroach Community
// License (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the
    
func TestAlterChangefeedDatabaseScopeUnqualifiedName(t *testing.T) {
	defer leaktest.AfterTest(t)()
	defer log.Scope(t).Close(t)

	testFn := func(t *testing.T, s TestServer, f cdctest.TestFeedFactory) {
		sqlDB := sqlutils.MakeSQLRunner(s.DB)
		sqlDB.Exec(t, `CREATE DATABASE movr`)
		sqlDB.Exec(t, `CREATE DATABASE new_movr`)

		sqlDB.Exec(t, `CREATE TABLE movr.drivers (id INT PRIMARY KEY, name STRING)`)
		sqlDB.Exec(t, `CREATE TABLE new_movr.drivers (id INT PRIMARY KEY, name STRING)`)

		sqlDB.Exec(t,
			`INSERT INTO movr.drivers VALUES (1, 'Alice')`,
		)

		sqlDB.Exec(t, `USE movr`)
		testFeed := feed(t, f, `CREATE CHANGEFEED FOR drivers WITH diff, resolved = '100ms'`)
		defer closeFeed(t, testFeed)

		assertPayloads(t, testFeed, []string{
			`drivers: [1]->{"after": {"id": 1, "name": "Alice"}, "before": null}`,
		})

		expectResolvedTimestamp(t, testFeed)

		feed, ok := testFeed.(cdctest.EnterpriseTestFeed)
		require.True(t, ok)

		require.NoError(t, feed.Pause())

		sqlDB.Exec(t, `USE new_movr`)

		sqlDB.Exec(t, fmt.Sprintf(`ALTER CHANGEFEED %d UNSET diff`, feed.JobID()))

		require.NoError(t, feed.Resume())

		sqlDB.Exec(t,
			`INSERT INTO movr.drivers VALUES (2, 'Bob')`,
		)

		assertPayloads(t, testFeed, []string{
			`drivers: [2]->{"after": {"id": 2, "name": "Bob"}}`,
		})
	}

	cdcTest(t, testFn, feedTestEnterpriseSinks, feedTestNoExternalConnection, feedTestUseRootUserConnection)
}