Fix move length, locate method above the function method in ExpressionsTest

[waahhh]

Motivation

Modifications

move length, locate method above the function method in ExpressionsTest

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• Please commit your modification based by conventional commit:

Commit type	Description
feat	New Feature
fix	Fix bug
docs	Documentation only changed
ci	Change CI configuration
refactor	Not a bug fix or add feature, just refactoring code
test	Add Test case or fix wrong test case
style	Only change the code style(ex. white-space, formatting)
chore	It refers to minor tasks such as library version upgrade, typo correction, etc.

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Result

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Closes

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