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convert.swift

typealias InputAndExpected = [String: String]
let x: InputAndExpected = [
    "11": "11.0",
    "11.0": "11.0",
    "11.01": "11.01",
    "11.1": "11.1",
    "11.10": "11.10",
    "11.11": "11.11"
]

func convert(input: String) -> String {
    input.contains(".") ? input : input + ".0"
}

func isValid(input: String) -> Bool {
    Float(input) != nil
}

for (key, value) in x {
    let v = convert(input: key)
    if value != v {
        fatalError("failure \(key), value: \(value), v: \(v)")
    }
    if !isValid(input: v) {
        fatalError("failure \(key), value: \(value), v: \(v)")
    }
}

print("Finish")