code linter 校验return Promise<string>类型

import { BusinessError } from ‘@ohos.base’ 
 
export default class PromiseUtil { 
static test(): Promise<string> { 
return new Promise((resolve, reject) => { 
let value: string = ‘’; 
//todo 获取value值 
// … 
if (value != undefined) { 
//执行then 
resolve(value); 
} else { 
let error: BusinessError = { 
name: ‘xxx’, 
message: ‘value is undefined’, 
code: 500 
}; 
//执行catch 
reject(error); 
} 
}); 
} 
 
static execTest() { 
PromiseUtil.test().then(value => { 
console.info(value); 
}).catch((err: BusinessError) => { 
console.info(err code: ${err.code}, message: ${err.message}); 
}); 
}