     }
 
     func testFilterFormat() {
+        XCTAssertEqual(Int(1), results.filter("stringCol = '1'").count)
         XCTAssertEqual(Int(1), results.filter("stringCol = %@", "1").count)
         XCTAssertEqual(Int(1), results.filter("stringCol = %@", "2").count)
         XCTAssertEqual(Int(0), results.filter("stringCol = %@", "3").count)

    func testSubscript() {
        XCTAssertEqual(str1, results[0])
        XCTAssertEqual(str2, results[1])
    }

    func testFirst() {

        XCTAssertEqual(Float(1.1), results.min("floatCol") as Float!)
        XCTAssertEqual(Double(1.11), results.min("doubleCol") as Double!)
        XCTAssertEqual(NSDate(timeIntervalSince1970: 1), results.min("dateCol") as NSDate!)

        assertThrows(results.min("noSuchCol") as Float!)
    }

    func testMax() {
