Coverage Summary for Class: Emoji (io.heapy.kotmark.ext.emoji)

 package io.heapy.kotmark.ext.emoji
 
 import io.heapy.kotmark.node.CustomNode
 import io.heapy.kotmark.node.Text
 
 /**
  * An emoji written as `:shortcode:`. Its Unicode text is a [Text] child so visitors
  * that collect text (including image alt text) can read it without knowing this node type.
  * Markdown rendering preserves [shortcode]; HTML and plain text render the children.
  */
 class Emoji(val shortcode: String, unicode: String) : CustomNode() {
     init {
         require(shortcode.isNotEmpty() && shortcode.all(::isShortcodeCharacter)) {
             "Emoji shortcode must contain only lowercase ASCII letters, digits, '_', '+' or '-'"
         }
         require(unicode.isNotEmpty() && '\n' !in unicode && '\r' !in unicode) {
             "Emoji text must be nonempty and fit on one line"
         }
         appendChild(Text(unicode))
     }
 }
 
 internal fun isShortcodeCharacter(character: Char): Boolean =
     character in 'a'..'z' || character in '0'..'9' || character == '_' || character == '+' || character == '-'