Verify internal anchor links

test/link-check.js

@@ -3,6 +3,7 @@
 var colors = require('colors/safe')
 var fs = require('fs')
 var glob = require('glob')
+var toc = require('markdown-toc')
 var markdownLinkCheck = require('markdown-link-check')
 var path = require('path')
 
@@ -21,7 +22,18 @@ files.forEach(function (file) {
 
     console.log('Reading: ' + file)
 
+    var markdownToc = toc(markdown, {
+      filter: (string, _, __) => string.indexOf('Table of Contents') === -1
+    }).content
+
     results.forEach(function (result) {
+      if (result.link.match(/^#/)) {
+        if (!markdownToc.includes(result.link)) {
+          result.status = 'dead'
+          result.statusCode = 0
+        }
+      }
+
       if (result.status === 'dead') {
         if (result.statusCode === 500) {
           console.log(colors.yellow(`Server error on target: ${result.link}`))