status-go/appdatabase/test_helpers.go

package appdatabase

import (
	"database/sql"
	"io/ioutil"
	"os"

	"github.com/status-im/status-go/protocol/sqlite"
)

const kdfIterationsNumberForTests = 3200

// SetupTestSQLDB creates a temporary sqlite database file, initialises and then returns with a teardown func
func SetupTestSQLDB(prefix string) (*sql.DB, func() error, error) {
	tmpfile, err := ioutil.TempFile("", prefix)
	if err != nil {
		return nil, nil, err
	}
	db, err := InitializeDB(tmpfile.Name(), prefix, kdfIterationsNumberForTests)
	if err != nil {
		return nil, nil, err
	}

	return db, func() error {
		err := db.Close()
		if err != nil {
			return err
		}
		return os.Remove(tmpfile.Name())
	}, nil
}

func SetupTestMemorySQLDB(prefix string) (*sql.DB, error) {
	db, err := InitializeDB(sqlite.InMemoryPath, prefix, kdfIterationsNumberForTests)
	if err != nil {
		return nil, err
	}

	return db, nil
}

func ColumnExists(db *sql.DB, tableName string, columnName string) (bool, error) {
	rows, err := db.Query("PRAGMA table_info(" + tableName + ")")
	if err != nil {
		return false, err
	}
	defer rows.Close()

	var cid int
	var name string
	var dataType string
	var notNull bool
	var dFLTValue sql.NullString
	var pk int

	for rows.Next() {
		err := rows.Scan(&cid, &name, &dataType, &notNull, &dFLTValue, &pk)
		if err != nil {
			return false, err
		}
		if name == columnName {
			return true, nil
		}
	}

	if rows.Err() != nil {
		return false, rows.Err()
	}

	return false, nil
}