public function testAddPrimaryKey()
{
$this->specify('The SQL generated to add the primary key to a table is incorrect', function ($schema, $index, $expected) {
$dialect = new Postgresql();
$indexes = $this->getIndexes();
expect($dialect->addPrimaryKey('table', $schema, $indexes[$index]))->equals($expected);
}, ['examples' => $this->getAddPrimaryKey()]);
}