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// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.
package schema
import (
"bytes"
"context"
"strings"
"testing"
"github.com/facebook/ent/dialect"
"github.com/stretchr/testify/require"
)
func TestWriteDriver(t *testing.T) {
b := &bytes.Buffer{}
w := WriteDriver{Driver: nopDriver{}, Writer: b}
ctx := context.Background()
tx, err := w.Tx(ctx)
require.NoError(t, err)
err = tx.Query(ctx, "SELECT `name` FROM `users`", nil, nil)
require.NoError(t, err)
err = tx.Query(ctx, "SELECT `name` FROM `users`", nil, nil)
require.NoError(t, err)
err = tx.Exec(ctx, "ALTER TABLE `users` ADD COLUMN `age` int", nil, nil)
require.NoError(t, err)
err = tx.Exec(ctx, "ALTER TABLE `users` ADD COLUMN `NAME` varchar(100);", nil, nil)
require.NoError(t, err)
err = tx.Query(ctx, "SELECT `name` FROM `users`", nil, nil)
require.NoError(t, err)
require.NoError(t, tx.Commit())
lines := strings.Split(b.String(), "\n")
require.Equal(t, "BEGIN;", lines[0])
require.Equal(t, "ALTER TABLE `users` ADD COLUMN `age` int;", lines[1])
require.Equal(t, "ALTER TABLE `users` ADD COLUMN `NAME` varchar(100);", lines[2])
require.Equal(t, "COMMIT;", lines[3])
require.Empty(t, lines[4], "file ends with blank line")
}
type nopDriver struct {
dialect.Driver
}
func (nopDriver) Exec(context.Context, string, interface{}, interface{}) error {
return nil
}
func (nopDriver) Query(context.Context, string, interface{}, interface{}) error {
return nil
}
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