Here is a sample article based on the code detail:

Analysis of Error Message: Solana Vote App Test File

When you try to initialize the “polna” structure in a solana vote test file, there is a common error. The question arises from the experiment to assign an argument type to the “U64” parameter as a “BN” (large number) value. In this article we dissect the code and explore the possible causes.

Code analysis

The specified test file detail contains the following lines:

`rust

#!

// attempting to initialize public opinion research with BN argument

#[test]

fn test_poll_init () {

// ...

Be results = poll.init ();

}

Note that it is used as an argument “BN” as a function of “Poll” Struct init (). However, this type of pseudonym does not correspond to the valid “U64” value.

Possible reasons

Many factors can contribute to this error:

• Type Type Incompatibility : The “BN” type “BN”, provided by the “Solana-type-alias” box, is probably not compatible with the parameter of “Poll” Struct U64".

• Lack of import or definition : Make sure that the typeu64″ can be properly imported and determined in the test file.

• Incorrect use of type of pseudonyms

  : “BN” pseudonym should be used in an environment where it can be safely inferred as “U64”. If not, consider using a more appropriate type for use.

Suggested solution

To solve the problem, make sure that:

• The necessary types were imported from the “Solana-Type-Alias” box.

2.

• The correct syntax allows you to assign the “U64” argument to the “Poll” Struct parameter.

Here’s an updated example:

`rust

#!

Use solana_type_alias :: {bn, u64};

#[test]

fn test_poll_init () {

// ...

Let Vote = Vote :: New ();

Be results = poll.init ();

}

In this revised example, “U64” is imported from the “Solana-type-alias” box and is used as a “U64” parameter for init ().

Conclusion

The error message indicates that they attempted to assign a “BN” value to another type (u64") to a "U64" type. By analyzing the code, it becomes clear that the problem comes from improper use or imports of types. To solve this, make sure you use the correct types and syntax in the test file.

The best practice

To avoid similar questions in the future:

• Make sure theBN” pseudonym is properly imported.

• Make sure you have access to a valid `u64 ‘parameter’ U64 ‘parameter’ U64 ‘.

• Use the correct syntax to assign the “U64” argument to the “U64” parameter.

By following these guidelines, you can write a more robust and error -free test code for Solana Vote.