Function f

test/compute-engine/power-combination.test.ts:262–266

(theta: Expression)

    // Regression: the power path used to Euler-expand the square while the
    // base stayed exponential.
    const sq = engine.expr(['Power', eToTheI('x'), 2]);
    expect(sq.toString()).toBe('e^(2i * x)');
    expect(sq.evaluate().toString()).toBe('e^(2i * x)');
  });

  test('constant angles still reduce', () => {
    expect(engine.expr(eToTheI(['Divide', 'Pi', 2])).evaluate().toString()).toBe(
      'i'