ink_commonmark_tests.swift

import Foundation
import Ink

func tidy(_ inputStr: String) -> String {
    let task = Process()
    task.launchPath = "/usr/local/Cellar/tidy-html5/5.6.0/bin/tidy"
    task.arguments = ["--show-body-only", "yes", "--show-info", "no", "--show-warnings", "no", "--show-errors", "0"]
    
    let input = Pipe()
    let output = Pipe()
    let err = Pipe()
    
    task.standardInput = input
    task.standardOutput = output
    task.standardError = err
    
    task.launch()
    
    let inputData = inputStr.data(using: .utf8)!
    input.fileHandleForWriting.write(inputData)
    try! input.fileHandleForWriting.close()
    
    let outputData = output.fileHandleForReading.readDataToEndOfFile()
    let outputStr = String(data: outputData, encoding: .utf8)
    
    return outputStr!
}

struct TestCase: Decodable {
    let markdown: String
    let html: String
}

let testURL = URL(string: "https://spec.commonmark.org/0.29/spec.json")!
let data = try! Data(contentsOf: testURL)

let jsonDecoder = JSONDecoder()
let testCases = try! jsonDecoder.decode(Array<TestCase>.self, from: data)

let mdParser = MarkdownParser()
var pass = 0
for testCase in testCases {
    let gotHTML = mdParser.html(from: testCase.markdown)
    if (gotHTML == testCase.html) {
        pass += 1
    } else {
        let gotTidied = tidy(gotHTML)
        let testTidied = tidy(testCase.html)
        if (gotTidied != "" && gotTidied == testTidied) {
            pass += 1
        } else {
            print("Input:\n\(testCase.markdown)")
            print("----------------------------------------------------------------")
            print(testCase.html.replacingOccurrences(of: "\n", with: "\\n"))
            print("----------------------------------------------------------------")
            print(gotHTML.replacingOccurrences(of: "\n", with: "\\n"))
            print("================================================================")
        }
    }
}
print("\(pass)/\(testCases.count) passed")

@john-mueller ah yes, HTML parsing errors would def. be an issue–definitely can be improved–When tidy() output is blank is treated as failing it decreases to 193.