Db

Installation

composer require --dev codeception/module-db

Description

Access a database.

The most important function of this module is to clean a database before each test. This module also provides actions to perform checks in a database, e.g. seeInDatabase()

In order to have your database populated with data you need a raw SQL dump. Simply put the dump in the tests/_data directory (by default) and specify the path in the config. The next time after the database is cleared, all your data will be restored from the dump. Don’t forget to include CREATE TABLE statements in the dump.

Supported and tested databases are:

• MySQL
• SQLite (i.e. just one file)
• PostgreSQL

Also available:

• MS SQL
• Oracle

Connection is done by database Drivers, which are stored in the Codeception\Lib\Driver namespace. Check out the drivers if you run into problems loading dumps and cleaning databases.

Config

• dsn required - PDO DSN
• user required - username to access database
• password required - password
• dump - path to database dump
• populate: false - whether the the dump should be loaded before the test suite is started
• cleanup: false - whether the dump should be reloaded before each test
• reconnect: false - whether the module should reconnect to the database before each test
• waitlock: 0 - wait lock (in seconds) that the database session should use for DDL statements
• ssl_key - path to the SSL key (MySQL specific, @see https://php.net/manual/de/ref.pdo-mysql.php#pdo.constants.mysql-attr-key)
• ssl_cert - path to the SSL certificate (MySQL specific, @see https://php.net/manual/de/ref.pdo-mysql.php#pdo.constants.mysql-attr-ssl-cert)
• ssl_ca - path to the SSL certificate authority (MySQL specific, @see https://php.net/manual/de/ref.pdo-mysql.php#pdo.constants.mysql-attr-ssl-ca)
• ssl_verify_server_cert - disables certificate CN verification (MySQL specific, @see https://php.net/manual/de/ref.pdo-mysql.php)
• ssl_cipher - list of one or more permissible ciphers to use for SSL encryption (MySQL specific, @see https://php.net/manual/de/ref.pdo-mysql.php#pdo.constants.mysql-attr-cipher)
• databases - include more database configs and switch between them in tests.
• initial_queries - list of queries to be executed right after connection to the database has been initiated, i.e. creating the database if it does not exist or preparing the database collation
• skip_cleanup_if_failed - Do not perform the cleanup if the tests failed. If this is used, manual cleanup might be required when re-running

  Example

  modules: enabled: - Db: dsn: ‘mysql:host=localhost;dbname=testdb’ user: ‘root’ password: ‘’ dump: ‘tests/_data/dump.sql’ populate: true cleanup: true reconnect: true waitlock: 10 skip_cleanup_if_failed: true ssl_key: ‘/path/to/client-key.pem’ ssl_cert: ‘/path/to/client-cert.pem’ ssl_ca: ‘/path/to/ca-cert.pem’ ssl_verify_server_cert: false ssl_cipher: ‘AES256-SHA’ initial_queries: - ‘CREATE DATABASE IF NOT EXISTS temp_db;’ - ‘USE temp_db;’ - ‘SET NAMES utf8;’

Example with multi-dumps

modules:
     enabled:
        - Db:
           dsn: 'mysql:host=localhost;dbname=testdb'
           user: 'root'
           password: ''
           dump:
              - 'tests/_data/dump.sql'
              - 'tests/_data/dump-2.sql'

Example with multi-databases

modules:
   enabled:
      - Db:
         dsn: 'mysql:host=localhost;dbname=testdb'
         user: 'root'
         password: ''
         databases:
            db2:
               dsn: 'mysql:host=localhost;dbname=testdb2'
               user: 'userdb2'
               password: ''

Example with Sqlite

modules:
   enabled:
      - Db:
         dsn: 'sqlite:relative/path/to/sqlite-database.db'
         user: ''
         password: ''

SQL data dump

There are two ways of loading the dump into your database:

Populator

The recommended approach is to configure a populator, an external command to load a dump. Command parameters like host, username, password, database can be obtained from the config and inserted into placeholders:

For MySQL:

modules:
   enabled:
      - Db:
         dsn: 'mysql:host=localhost;dbname=testdb'
         user: 'root'
         password: ''
         dump: 'tests/_data/dump.sql'
         populate: true # run populator before all tests
         cleanup: true # run populator before each test
         populator: 'mysql -u $user -h $host $dbname < $dump'

For PostgreSQL (using pg_restore)

modules:
   enabled:
      - Db:
         dsn: 'pgsql:host=localhost;dbname=testdb'
         user: 'root'
         password: ''
         dump: 'tests/_data/db_backup.dump'
         populate: true # run populator before all tests
         cleanup: true # run populator before each test
         populator: 'pg_restore -u $user -h $host -D $dbname < $dump'

Variable names are being taken from config and DSN which has a keyword=value format, so you should expect to have a variable named as the keyword with the full value inside it.

PDO dsn elements for the supported drivers:

• MySQL: PDO_MYSQL DSN
• SQLite: PDO_SQLITE DSN - use relative path from the project root
• PostgreSQL: PDO_PGSQL DSN
• MSSQL: PDO_SQLSRV DSN
• Oracle: PDO_OCI DSN

Dump

Db module by itself can load SQL dump without external tools by using current database connection. This approach is system-independent, however, it is slower than using a populator and may have parsing issues (see below).

Provide a path to SQL file in dump config option:

modules:
   enabled:
      - Db:
         dsn: 'mysql:host=localhost;dbname=testdb'
         user: 'root'
         password: ''
         populate: true # load dump before all tests
         cleanup: true # load dump for each test
         dump: 'tests/_data/dump.sql'

To parse SQL Db file, it should follow this specification:

• Comments are permitted.
• The dump.sql may contain multiline statements.
• The delimiter, a semi-colon in this case, must be on the same line as the last statement:

-- Add a few contacts to the table.
REPLACE INTO `Contacts` (`created`, `modified`, `status`, `contact`, `first`, `last`) VALUES
(NOW(), NOW(), 1, 'Bob Ross', 'Bob', 'Ross'),
(NOW(), NOW(), 1, 'Fred Flintstone', 'Fred', 'Flintstone');

-- Remove existing orders for testing.
DELETE FROM `Order`;

Query generation

seeInDatabase, dontSeeInDatabase, seeNumRecords, grabFromDatabase and grabNumRecords methods accept arrays as criteria. WHERE condition is generated using item key as a field name and item value as a field value.

Example:

<?php
$I->seeInDatabase('users', ['name' => 'Davert', 'email' => '[email protected]']);

Will generate:

SELECT COUNT(*) FROM `users` WHERE `name` = 'Davert' AND `email` = '[email protected]'

Since version 2.1.9 it’s possible to use LIKE in a condition, as shown here:

<?php
$I->seeInDatabase('users', ['name' => 'Davert', 'email like' => 'davert%']);

Will generate:

SELECT COUNT(*) FROM `users` WHERE `name` = 'Davert' AND `email` LIKE 'davert%'

Null comparisons are also available, as shown here:

<?php
$I->seeInDatabase('users', ['name' => null, 'email !=' => null]);

Will generate:

SELECT COUNT(*) FROM `users` WHERE `name` IS NULL AND `email` IS NOT NULL

Public Properties

• dbh - contains the PDO connection
• driver - contains the Connection Driver

Actions

amConnectedToDatabase

• param string $databaseKey
• throws ModuleConfigException
• return void

Make sure you are connected to the right database.

<?php
$I->seeNumRecords(2, 'users');   //executed on default database
$I->amConnectedToDatabase('db_books');
$I->seeNumRecords(30, 'books');  //executed on db_books database
//All the next queries will be on db_books

dontSeeInDatabase

• param string $table
• param array $criteria
• return void

Effect is opposite to ->seeInDatabase

Asserts that there is no record with the given column values in a database. Provide table name and column values.

<?php
$I->dontSeeInDatabase('users', ['name' => 'Davert', 'email' => '[email protected]']);

Fails if such user was found.

Comparison expressions can be used as well:

<?php
$I->dontSeeInDatabase('posts', ['num_comments >=' => '0']);
$I->dontSeeInDatabase('users', ['email like' => 'miles%']);

Supported operators: <, >, >=, <=, !=, like.

grabColumnFromDatabase

• param string $table
• param string $column
• param array $criteria
• return array

Fetches all values from the column in database.

Provide table name, desired column and criteria.

<?php
$mails = $I->grabColumnFromDatabase('users', 'email', array('name' => 'RebOOter'));

grabEntriesFromDatabase

• param string $table
• param array $criteria
• throws PDOException|Exception
• return array<array<string, mixed» Returns an array of all matched rows

Fetches a set of entries from a database.

Provide table name and criteria.

<?php
$mail = $I->grabEntriesFromDatabase('users', array('name' => 'Davert'));

Comparison expressions can be used as well:

<?php
$post = $I->grabEntriesFromDatabase('posts', ['num_comments >=' => 100]);
$user = $I->grabEntriesFromDatabase('users', ['email like' => 'miles%']);

Supported operators: <, >, >=, <=, !=, like.

grabEntryFromDatabase

• param string $table
• param array $criteria
• throws PDOException|Exception
• return array Returns a single entry value

Fetches a whole entry from a database.

Make the test fail if the entry is not found. Provide table name, desired column and criteria.

<?php
$mail = $I->grabEntryFromDatabase('users', array('name' => 'Davert'));

Comparison expressions can be used as well:

<?php
$post = $I->grabEntryFromDatabase('posts', ['num_comments >=' => 100]);
$user = $I->grabEntryFromDatabase('users', ['email like' => 'miles%']);

Supported operators: <, >, >=, <=, !=, like.

grabFromDatabase

• param string $table
• param string $column
• param array $criteria
• return mixed Returns a single column value or false

Fetches a single column value from a database.

Provide table name, desired column and criteria.

<?php
$mail = $I->grabFromDatabase('users', 'email', array('name' => 'Davert'));

Comparison expressions can be used as well:

<?php
$postNum = $I->grabFromDatabase('posts', 'num_comments', ['num_comments >=' => 100]);
$mail = $I->grabFromDatabase('users', 'email', ['email like' => 'miles%']);

Supported operators: <, >, >=, <=, !=, like.

grabNumRecords

• param string $table Table name
• param array $criteria Search criteria [Optional]
• return int

Returns the number of rows in a database

haveInDatabase

• param string $table
• param array $data
• return int

Inserts an SQL record into a database. This record will be erased after the test, unless you’ve configured “skip_cleanup_if_failed”, and the test fails.

<?php
$I->haveInDatabase('users', array('name' => 'miles', 'email' => '[email protected]'));

performInDatabase

• param $databaseKey
• param ActionSequence|array|callable $actions
• throws ModuleConfigException
• return void

Can be used with a callback if you don’t want to change the current database in your test.

<?php
$I->seeNumRecords(2, 'users');   //executed on default database
$I->performInDatabase('db_books', function($I) {
    $I->seeNumRecords(30, 'books');  //executed on db_books database
});
$I->seeNumRecords(2, 'users');  //executed on default database

List of actions can be pragmatically built using Codeception\Util\ActionSequence:

<?php
$I->performInDatabase('db_books', ActionSequence::build()
    ->seeNumRecords(30, 'books')
);

Alternatively an array can be used:

$I->performInDatabase('db_books', ['seeNumRecords' => [30, 'books']]);

Choose the syntax you like the most and use it,

Actions executed from array or ActionSequence will print debug output for actions, and adds an action name to exception on failure.

seeInDatabase

• param string $table
• param array $criteria
• return void

Asserts that a row with the given column values exists.

Provide table name and column values.

<?php
$I->seeInDatabase('users', ['name' => 'Davert', 'email' => '[email protected]']);

Fails if no such user found.

Comparison expressions can be used as well:

<?php
$I->seeInDatabase('posts', ['num_comments >=' => '0']);
$I->seeInDatabase('users', ['email like' => '[email protected]']);

Supported operators: <, >, >=, <=, !=, like.

seeNumRecords

• param int $expectedNumber Expected number
• param string $table Table name
• param array $criteria Search criteria [Optional]
• return void

Asserts that the given number of records were found in the database.

<?php
$I->seeNumRecords(1, 'users', ['name' => 'davert'])

updateInDatabase

• param string $table
• param array $data
• param array $criteria
• return void

Update an SQL record into a database.

<?php
$I->updateInDatabase('users', array('isAdmin' => true), array('email' => '[email protected]'));