🐛✅ support headings in list items

CommonMark specifically [allows headings in list items](https://spec.commonmark.org/0.31.2/#example-300).

index.js

@@ -47,10 +47,12 @@ function extractSections(markdown) {
     // First remove code blocks.
     markdown = markdown.replace(/^```[\S\s]+?^```$/mg, '');
 
-    const sectionTitles = markdown.match(/^#+ .*$/gm) || [];
+    const sectionTitles = Array.from(
+        markdown.matchAll(/^(?:\s*(?:[-*+]|\d+[.)])\s+)?(#+ .*)$/gm) ?? []
+    );
 
     const sections = sectionTitles.map(section =>
-        section.replace(/^\W+/, '').replace(/\W+$/, '').replace(/[^\w\s-]+/g, '').replace(/\s+/g, '-').toLowerCase()
+        section[1].replace(/^\W+/, '').replace(/\W+$/, '').replace(/[^\w\s-]+/g, '').replace(/\s+/g, '-').toLowerCase()
     );
 
     var uniq = {};

test/hash-links.md

@@ -23,3 +23,19 @@ There is an anchor named [Tomato](#tomato).
 ## Header with special char ✨
 
 Test [header with image](#header-with-special-char-)
+
+1. # Header in an ordered list
+
+    I'm in [the ordered list](#header-in-an-ordered-list)
+
+    1. ## Indented header in an ordered list
+
+        I'm in [the indented ordered list](#indented-header-in-an-ordered-list)
+
+- # Header in an unordered list
+
+    I'm in [the unordered list](#header-in-an-unordered-list)
+
+    - ## Indented header in an unordered list
+
+        I'm in [the indented unordered list](#indented-header-in-an-unordered-list)

test/markdown-link-check.test.js

@@ -370,7 +370,8 @@ describe('markdown-link-check', function () {
             done();
         });
     });
-    it('check hash links', function (done) {
+
+    it('should validate hash links', function (done) {
         markdownLinkCheck(fs.readFileSync(path.join(dirname, 'hash-links.md')).toString(), {}, function (err, result) {
             expect(err).to.be(null);
             expect(result).to.eql([
@@ -379,7 +380,12 @@ describe('markdown-link-check', function () {
                 { link: '#potato', statusCode: 404, err: null, status: 'dead' },
                 { link: '#tomato', statusCode: 404, err: null, status: 'dead' },
                 { link: '#header-with-special-char-', statusCode: 404, err: null, status: 'dead' },
+                { link: '#header-in-an-ordered-list', statusCode: 200, err: null, status: 'alive' },
+                { link: '#indented-header-in-an-ordered-list', statusCode: 200, err: null, status: 'alive' },
+                { link: '#header-in-an-unordered-list', statusCode: 200, err: null, status: 'alive' },
+                { link: '#indented-header-in-an-unordered-list', statusCode: 200, err: null, status: 'alive' },
             ]);
+
             done();
         });
     });