Method start

test/parallel/test-whatwg-readablestream.js:1108–1113

(controller)

    cancelCalled = false;

    start(controller) {
      // eslint-disable-next-line node-core/must-call-assert
      assert.strictEqual(this, source);
      this.startCalled = true;
      controller.enqueue('a');
    }

    pull() {
      // eslint-disable-next-line node-core/must-call-assert