auto-sizing cells with variable height content

TestVC.swift

import UIKit
import SnapKit

class TestVC: UITableViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        tableView.estimatedRowHeight = 58
        tableView.rowHeight = UITableView.automaticDimension
        
        tableView.dataSource = self
    }
    
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 30
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        return MyCell()
    }
}

class MyCell : UITableViewCell {
    
    init() {
        super.init(style: .default, reuseIdentifier: nil)
        setup()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setup() {
        let myView = MyView()
        contentView.addSubview(myView)
        myView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
    }
}

class MyView: UIView {
    
    lazy var artView: UIView = {
        let artView = UIView()
        artView.backgroundColor = .black
        return artView
    }()
    
    lazy var textView: UIView = {
        let textView = UIView()
        textView.backgroundColor = .darkGray
        return textView
    }()

    init() {
        super.init(frame: .zero)
        setup()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setup() {
        addSubview(artView)
        artView.snp.makeConstraints { make in
            make.size.equalTo(48)
            make.left.equalToSuperview().offset(16)
            
            make.centerY.equalToSuperview()
            make.top.greaterThanOrEqualToSuperview().inset(5)
            make.bottom.lessThanOrEqualToSuperview().inset(5)
        }
        
        addSubview(textView)
        textView.snp.makeConstraints { make in
            make.left.equalTo(artView.snp.right).offset(12)
            make.right.equalToSuperview().inset(16)
            make.height.equalTo(20 + CGFloat.random(in: 0...56))
            
            make.centerY.equalToSuperview()
            make.top.greaterThanOrEqualToSuperview().inset(5)
            make.bottom.lessThanOrEqualToSuperview().inset(5)
        }
    }
}