public function testSelectFirstCell() { $this->assertEquals(1, $this->connection->selectFirstCell('writers', 'id', ['`name` = ?', 'Leo Tolstoy'])); $this->assertEquals(2, $this->connection->selectFirstCell('writers', 'id', ['`name` = ?', 'Alexander Pushkin'])); $this->assertEquals(3, $this->connection->selectFirstCell('writers', 'id', ['`name` = ?', 'Fyodor Dostoyevsky'])); $this->assertEquals('Leo Tolstoy', $this->connection->selectFirstCell('writers', 'name', ['`id` = ?', 1])); $this->assertEquals('Alexander Pushkin', $this->connection->selectFirstCell('writers', 'name', ['`id` = ?', 2])); $this->assertEquals('Fyodor Dostoyevsky', $this->connection->selectFirstCell('writers', 'name', ['`id` = ?', 3])); }