$arguments * * @dataProvider expressionProvider */ public function testConcatExpression(array $arguments, string $expected): void { $platform = $this->connection->getDatabasePlatform(); $query = $platform->getDummySelectSQL($platform->getConcatExpression(...$arguments)); self::assertEquals($expected, $this->connection->fetchOne($query)); } /** @return iterable,string}> */ public static function expressionProvider(): iterable { yield 'strings' => [["'foo'", "'bar'"], 'foobar']; yield 'numbers and a hyphen' => [['2010', "'-'", '2019'], '2010-2019']; } }