项目每次接口测试请求postman需要添加header信息等，非常的繁琐，使用Tests和Prescript联合可以解决。
    登录接口Tests添加脚本

    1. // 打印用于调试
    2. // 把返回的字符串转换成json对象
    3. var jsobj = JSON.parse(responseBody);
    4. const sessionId = jsobj.data.authUser.sessionId;
    5. console.log('登录成功--------------- sessionId：' +sessionId);
    6. // 设置sessionid到环境变量
    7. pm.environment.set("sessionId", sessionId);

    测试接口目录下添加脚本

    1. const sessionId = pm.environment.get("sessionId");
    2.  pm.request.headers.add({
    3.         key: 'sessionId',
    4.         value: sessionId
    5.     });
    6. let requestUrl = pm.request.url;
    7. console.log('开始请求api,url: ' + requestUrl)
    8. if(!requestUrl.getPath().startsWith('/services/')){
    9.     return;
    10. }
    11. const apiHost = pm.environment.get("api-host");
    12. requestUrl = apiHost + requestUrl.getPath();
    13. const apiToken = pm.environment.get("api-token");
    14. const apiSecret = pm.environment.get("api-secret");
    15. const requestMethod = pm.request.method;
    16. console.log('----------------- 开始获取 API header------------------------');
    17. var nowDate = new Date();
    18. var date = new Date(nowDate.valueOf() - 8 * 60 * 60 * 1000);
    19. var EEE = getEnglishWeek(date.getDay());
    20. var dd = formatNumber(date.getDate());
    21. var MMM = getEnglishMonth(date.getMonth());
    22. var yyyy = date.getFullYear();
    23. var mm = formatNumber(date.getMinutes());
    24. var ss = formatNumber(date.getSeconds());
    25. var zzz = "GMT";
    26. var HH = formatNumber(date.getHours());
    27. var authorizationDate = EEE + ", " + dd + " " + MMM + " " + yyyy + " " + HH + ":" + mm + ":" + ss + " " + zzz;
    28. var orderNo = yyyy + "" + (date.getMonth() + 1) + dd + HH + mm + ss;
    29. var line = '\n';
    30. var signedString = requestMethod + line + authorizationDate + line + requestUrl;
    31. var signSha1 = CryptoJS.HmacSHA1(signedString, apiSecret);
    32. var sign = CryptoJS.enc.Base64.stringify(signSha1);
    33. var authorization = "WallTech " + apiToken + ":" + sign;
    34. console.log('----------------- 获取 API header 成功------------------------');
    35. console.log('Authorization :' + authorization);
    36. console.log('X-WallTech-Date :' + authorizationDate);
    37. pm.request.headers.add({
    38.     key: 'Authorization',
    39.     value: authorization
    40. });
    41. pm.request.headers.add({
    42.     key: 'X-WallTech-Date',
    43.     value: authorizationDate
    44. });
    46. function getEnglishWeek(number){
    47.     var week;
    48.     if(number==0) week="Sun"
    49.     if(number==1) week="Mon"
    50.     if(number==2) week="Tue"
    51.     if(number==3) week="Wed"
    52.     if(number==4) week="Thu"
    53.     if(number==5) week="Fri"
    54.     if(number==6) week="Sat"
    55.     return week;
    56. };
    58. function getEnglishMonth(number){
    59.     var month;
    60.     if(number==0) month="Jan"
    61.     if(number==1) month="Feb"
    62.     if(number==2) month="Mar"
    63.     if(number==3) month="Apr"
    64.     if(number==4) month="May"
    65.     if(number==5) month="Jun"
    66.     if(number==6) month="Jul"
    67.     if(number==7) month="Aug"
    68.     if(number==8) month="Sep"
    69.     if(number==9) month="Oct"
    70.     if(number==10) month="Nov"
    71.     if(number==11) month="Dec"
    72.     return month;
    73. }
    75. function formatNumber(number){
    76.     if(number < 10){
    77.         return "0" + number + "";
    78.     }
    79.     return number + "";
    80. }

    这里有个问题，pm.request.url 获取到的路径里面不能带变量参数，获取到的不是最终替换变量的路径，而是之前的，如果用到了需要用正则替换。