limiter.acquire(1); // R0.00, from capacity
    limiter.acquire(3); // R0.00, from capacity
    limiter.acquire(1); // R0.00, concluding a burst of 5 permits

    limiter.acquire(); // R0.20, capacity exhausted
    assertEvents(
        "U1.00", "U1.00", "R0.00", "R0.00", "R0.00", "R0.00", // first request and burst
        "R0.20");
  }

  public void testCreateWarmupParameterValidation() {
    RateLimiter unused;

    limiter.acquire(1); // R0.00, from capacity
    limiter.acquire(3); // R0.00, from capacity
    limiter.acquire(1); // R0.00, concluding a burst of 5 permits

    limiter.acquire(); // R0.20, capacity exhausted
    assertEvents(
        "U1.00", "U1.00", "R0.00", "R0.00", "R0.00", "R0.00", // first request and burst
        "R0.20");
  }

  public void testCreateWarmupParameterValidation() {
    RateLimiter unused;