     
     func testSignBitIndex() {
         let tests = [
-            (input: UInt128(0), output: Int(127)),
+            (input: UInt128(), output: Int(127)),
             (input: UInt128.max, output: Int(0))]
         
         tests.forEach { test in

    
    func testCanBeSentToAFloat() {
        let expectedResult: Float = 1
        let testResult = Float(UInt128(1))
        XCTAssertEqual(testResult, expectedResult)
    }
}

    
    func testCanBeSentToAnInt() {
        let expectedResult: Int = 1
        let testResult = Int(UInt128(upperBits: 0, lowerBits: 1))
        XCTAssertEqual(testResult, expectedResult)
    }
    
