arc.js

const assert = require('assert')
const path = require('path');

module.exports = function (gm, dir, finish, GM) {

  var m = gm
  .blur(8, 4)
  .stroke("red", 3)
  .fill("#ffffffbb")
  .drawArc(80, 10, 90, 20, 0, 180)

  var args = m.args();
  assert.equal('convert', args[0]);
  assert.equal('-blur', args[2]);
  assert.equal('8x4', args[3]);
  assert.equal('-strokewidth', args[4]);
  assert.equal(3, args[5]);
  assert.equal('-stroke', args[6]);
  assert.equal('red', args[7]);
  assert.equal('-fill', args[8]);
  assert.equal('#ffffffbb', args[9]);
  assert.equal('-draw', args[10]);
  assert.equal('arc 80,10 90,20 0,180', args[11]);

  if (!GM.integration) return finish();

  const arcPath = path.join(dir, 'arc.png');

  m.write(arcPath, function arc (err) {
    finish(err);
  });
}