Function pull

packages/computer/src/stub.test.ts:566–579

(c)

          id: "e-1",
          events: new ReadableStream({
            pull(c) {
              pulls += 1;
              if (pulls < 10) {
                c.enqueue({
                  id: "e-1",
                  seq: pulls,
                  name: "stdout",
                  value: new Uint8Array([pulls]),
                });
                return;
              }
              c.enqueue({ id: "e-1", seq: 10, name: "exit", value: 0 });
              c.close();
            },
          }),
        };
      },