Tests string concatenation.
function testBasicConcat() {
$result = db_query('SELECT CONCAT(:a1, CONCAT(:a2, CONCAT(:a3, CONCAT(:a4, :a5))))', array(
':a1' => 'This',
':a2' => ' ',
':a3' => 'is',
':a4' => ' a ',
':a5' => 'test.',
));
$this
->assertIdentical($result
->fetchField(), 'This is a test.', 'Basic CONCAT works.');
}