@Test
  public void testGetFeCUCapacityFromJsonForEmptyJson() throws IOException {
    CapacityUnit feCapacityUnit = JsonCUQuotaDataProviderUtil.getFeCUCapacityFromJson(EMPTY_JSON);
    Assert.assertEquals(0, (long) feCapacityUnit.getRcu());
    Assert.assertEquals(0, (long) feCapacityUnit.getWcu());
  }
Create a {@link Container} with the specified containerId.
@param containerId id of the container.
@return Container object.
ambry-quota/src/test/java/com/github/ambry/quota/capacityunit/JsonCUQuotaDataProviderUtilTest.java