private static async getRangeGroup (eventType: string, channel: string): Promise<FeeRange[]> {
    if (StringUtils.isBlank(eventType)) {
      throw new Error('Fee eventType is required')
    }
    if (StringUtils.isBlank(channel)) {
      throw new Error('Fee channel is required')
    }
    const uri: string = `${feesUrl}/fees-register/fees?service=${service}&jurisdiction1=${jurisdiction1}&jurisdiction2=${jurisdiction2}&channel=${channel}&event=${eventType}&feeVersionStatus=approved`
    const options = {
      uri: uri
    }
    return request(options).then(function (response) {
      return plainToClass(FeeRange, response as object[])
    })

  }

 /**
  * Calculates the fee based on fee event and amount
  *
  * @param eventType which fee event to use
  * @param amount amount in GBP
  * @param channel online or paper/default
  * @returns {Promise.<FeeOutcome>} promise containing the Fee outcome (including fee amount in GBP)
  */
 static async calculateFee (eventType: string, amount: number, channel: string): Promise<FeeOutcome> {
   if (StringUtils.isBlank(eventType)) {
     throw new Error('Fee eventType is required')
   }
   if (StringUtils.isBlank(channel)) {
     throw new Error('Fee channel is required')
   }
   ClaimValidator.claimAmount(amount)
   const feeUri: string = `${feesUrl}/fees-register/fees/lookup?service=${service}&jurisdiction1=${jurisdiction1}&jurisdiction2=${jurisdiction2}&channel=${channel}&event=${eventType}&amount_or_volume=${amount}`
   const options = {
     uri: feeUri
   }
   return request(options).then(function (response) {
     return plainToClass(FeeOutcome, response as object)
   })
 }

export function buildURL (req: express.Request, path: string): string {
  if (StringUtils.isBlank(path)) {
    throw new Error('Path null or undefined')
  }
  if (req === undefined) {
    throw new Error('Request is undefined')
  }
  const protocol = 'https://'
  const host = req.headers.host

  const baseURL: string = `${protocol}${host}`
  if (path.startsWith('/')) {
    return baseURL + path
  } else {
    return `${baseURL}/${path}`
  }
}

  private static convertDefendantDetails (draftClaim: DraftClaim): TheirDetails {
    const defendantDetails: PartyDetails = draftClaim.defendant.partyDetails
    switch (defendantDetails.type) {
      case PartyType.INDIVIDUAL.value:
        const individualDetails = defendantDetails as IndividualDetails

        return new DefendantAsIndividual(
          StringUtils.trimToUndefined(individualDetails.title),
          individualDetails.firstName,
          individualDetails.lastName,
          this.convertAddress(individualDetails.address),
          StringUtils.trimToUndefined(draftClaim.defendant.email.address)
        )

      case PartyType.SOLE_TRADER_OR_SELF_EMPLOYED.value:
        const soleTraderDetails: SoleTraderDetails = defendantDetails as SoleTraderDetails

        return new DefendantAsSoleTrader(
          StringUtils.trimToUndefined(soleTraderDetails.title),
          soleTraderDetails.firstName,
          soleTraderDetails.lastName,
          this.convertAddress(soleTraderDetails.address),
          StringUtils.trimToUndefined(draftClaim.defendant.email.address),
          soleTraderDetails.businessName
        )

      case PartyType.COMPANY.value:
        const companyDetails = defendantDetails as CompanyDetails

        return new DefendantAsCompany(
          companyDetails.name,
          this.convertAddress(companyDetails.address),
          StringUtils.trimToUndefined(draftClaim.defendant.email.address),
          companyDetails.contactPerson
        )
      case PartyType.ORGANISATION.value:
        const organisationDetails = defendantDetails as OrganisationDetails

        return new DefendantAsOrganisation(
          organisationDetails.name,
          this.convertAddress(organisationDetails.address),
          StringUtils.trimToUndefined(draftClaim.defendant.email.address),
          organisationDetails.contactPerson
        )
      default:
        throw Error('Something went wrong, No defendant type is set')
    }
  }

 it('should return undefined if value is undefined', () => {
   expect(StringUtils.trimToUndefined(undefined)).to.be.undefined
 })

 static fullName (firstName: string, lastName: string, title?: string): string {
   return [StringUtils.trimToUndefined(title), firstName, lastName].filter(Boolean).join(' ')
 }