Function checkSimplify

test/compute-engine/simplify.test.ts:11–28

* Helper: parse input, simplify, check semantic equality with expected. * On failure, reports LaTeX for readability.

(
  input: string | Expression,
  expected: string | number | Expression
)

 * On failure, reports LaTeX for readability.
 */
function checkSimplify(
  input: string | Expression,
  expected: string | number | Expression
) {
  const a = typeof input === 'string' ? ce.parse(input) : ce.expr(input);
  const b =
    typeof expected === 'number'
      ? ce.expr(expected)
      : typeof expected === 'string'
      ? ce.parse(expected)
      : ce.expr(expected);

  const result = a.simplify();
  if (!result.isSame(b)) {
    // Provide readable failure message
    expect(`${result.latex}`).toBe(`${b.latex}`);
  }
}

// ============================================================
// CANONICALIZATION TEST CASES