@vincenttam/showdown-katex/src/asciimath-to-tex.spec.js

Showdown extension that adds LaTeX, ASCIImath and mhchem support

import test from 'ava';
import asciimathToTex from './asciimath-to-tex.js';

test('just a number', t => {
  t.is(asciimathToTex('5'), '{5}');
});

test('x=5', t => {
  t.is(asciimathToTex('x=5'), '{x}={5}');
});

test('x=5+2', t => {
  t.is(asciimathToTex('x=5+2'), '{x}={5}+{2}');
});

test('x = (-b+-sqrt(b^2-4ac))/(2a)', t => {
  t.is(
    asciimathToTex('x = (-b+-sqrt(b^2-4ac))/(2a)'),
    '{x}=\\frac{{-{b}\\pm\\sqrt{{{b}^{{2}}-{4}{a}{c}}}}}{{{2}{a}}}',
  );
});

test('{x}=(-b+-sqrt(b^2-4ac))/(2a)', t => {
  t.is(
    asciimathToTex('{x}=(-b+-sqrt(b^2-4ac))/(2a)'),
    '{\\left\\lbrace{x}\\right\\rbrace}=\\frac{{-{b}\\pm\\sqrt{{{b}^{{2}}-{4}{a}{c}}}}}{{{2}{a}}}',
  );
});