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  • [Typescript Unit testing] Error Handling with Unknown

    function somethingRisky() {}
    
    try {
        somethingRisky()
    } catch(err: unknown) {
        if (err instanceof Error) {
            console.log(err.stack)
        } else {
        
           console.log(err)
        }
    }

    Force to handle edge cases.

    Type assertion:

    function somethingRisky() {}
    
    // if err is an Error, then it is fine
    // if not, then throw
    function assertIsError(err: any): asserts err is Error {
        if (!(err istanceof Error)) throw new Error(`Not an error: ${err}`)
    }
    
    try {
        somethingRisky()
    } catch(err: unknown) {
       assertIsError(err);
        console.log(err)
    }
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  • 原文地址:https://www.cnblogs.com/Answer1215/p/13982892.html
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