postman Pre-request Script

#### pm.globals
//检测全局变量是否包含某个变量---返回布尔值
pm.globals.has(variableName:String)
//获取全局变量中的某个值
pm.globals.get(variableName:String)
//为某个全局变量设置值
pm.globals.set(variableName:String, variableValue:String)
//销毁某个全局变量
pm.globals.unset(variableName:String)
//清除全局变量
pm.globals.clear()
//将全局变量以一个对象的方式全部输出
pm.globals.toObject():function → Object


#### pm.environment
//检测环境变量是否包含某个变量---返回布尔值
pm.environment.has(variableName:String)
//获取环境变量中的某个值
pm.environment.get(variableName:String)
//为某个环境变量设置值
pm.environment.set(variableName:String, variableValue:String)
//销毁某个环境变量
pm.environment.unset(variableName:String)
//清除环境变量
pm.environment.clear()
//将环境变量以一个对象的方式全部输出
pm.environment.toObject():function → Object


#### pm.request
//获取当前发起请求的url
pm.request.url
//以数组的方式返回当前请求中的header信息
pm.request.headers

#### pm.sendRequest
// example with a plain string URL
pm.sendRequest('https://postman-echo.com/get', function (err, res) {
    if (err) {
        console.log(err);
    } else {
        pm.environment.set("variable_key", "new_value");
    }
});
 
// Example with a full fledged SDK Request
const echoPostRequest = {
  url: 'https://postman-echo.com/post',
  method: 'POST',
  header: 'headername1:value1',
  body: {
    mode: 'raw',
    raw: JSON.stringify({ key: 'this is json' })
  }
};
pm.sendRequest(echoPostRequest, function (err, res) {
  console.log(err ? err : res.json());
});
 
// example containing a test ** under the Tests tab only
pm.sendRequest('https://postman-echo.com/get', function (err, res) {
  if (err) { console.log(err); }
  pm.test('response should be okay to process', function () {
    pm.expect(err).to.equal(null);
    pm.expect(res).to.have.property('code', 200);
    pm.expect(res).to.have.property('status', 'OK');
  });
});