toPassCondition( rawReceived, operator, rawValue, expectation, source ) {
      const received = parseInt( rawReceived, 10 ),
            value = parseInt( rawValue, 10 ),
            pass = operator === "eq"
              ? received === value
              : ( operator === "gt" ? received > value : received < value );

      return expectReturn( pass,
        `[${ source }] expected ${ expectation
          ? `${ expectation } (${ received })` : received } to be ${ OPERATOR_MAP[ operator ] }${ value }` );
    }
Asser condition
@param {Number} rawReceived
@param {String} operator
@param {Number} rawValue
@param {String} expectation
@param {String} source
@returns {Object}