13     const headingManager = new HeadingManager(SluggerStub, meta);  constant
15     expect(headingManager.headings).toEqual([]);
16     expect(headingManager.metadata.headings).toEqual([]);
17     expect(headingManager.maxNestingLevel).toBe(BASE_HEADING_LEVEL + 2);
23     const headingManager = new HeadingManager(SluggerStub, meta);  constant
25     const result = headingManager['findMetaForTitle'](TITLE);
32     const headingManager = new HeadingManager(SluggerStub, meta);  constant
34     const result = headingManager['findMetaForTitle'](TITLE);
46   const headingManager = new HeadingManager(SluggerStub, meta);  constant
49     const result = headingManager.addHeading(META_TITLE);
57     const result = headingManager.addHeading('title not in meta', undefined);
63     headingManager.metadata.headings?.forEach(it => (it._processed = false));
65     const result = headingManager.addHeading(META_TITLE, 4);
71     const result = headingManager.addHeading('unused', 5, {
83     const tooLow = headingManager.addHeading('Too Low', BASE_HEADING_LEVEL - 1);
84     const ok = headingManager.addHeading('OK');
85     const tooHigh = headingManager.addHeading('Too High', 1337);
87     expect(headingManager.headings).toContain(ok);
88     expect(headingManager.headings).not.toContain(tooLow);
89     expect(headingManager.headings).not.toContain(tooHigh);
93     const result = headingManager.addHeading('The Unlisted', 2, {
97     expect(headingManager.headings).not.toContain(result);