Function addKeyIntervalTest

test/parallel/test-readline-keys.js:52–83

(sequences, expectedKeys, interval = 550,
                            assertDelay = 550)

// where noop is a terminal function(() => {}).

function addKeyIntervalTest(sequences, expectedKeys, interval = 550,
                            assertDelay = 550) {
  const fn = common.mustCall((next) => common.mustCall(() => {

    if (!Array.isArray(sequences)) {
      sequences = [ sequences ];
    }

    if (!Array.isArray(expectedKeys)) {
      expectedKeys = [ expectedKeys ];
    }

    expectedKeys = expectedKeys.map(extend);

    const keys = [];
    fi.on('keypress', (s, k) => keys.push(k));

    const emitKeys = common.mustCallAtLeast(([head, ...tail]) => {
      if (head) {
        fi.write(head);
        setTimeout(() => emitKeys(tail), interval);
      } else {
        setTimeout(common.mustCall(() => {
          next();
          assert.deepStrictEqual(keys, expectedKeys);
        }), assertDelay);
      }
    });
    emitKeys(sequences);
  }));
  return fn;
}

// Regular alphanumerics
addTest('io.JS', [