chore: add test util for to get failed count

[sunrabbit123]

if we failed test code, we need success rate for report

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[camc314]

Can you share an example of what this looks like before/after? I thought the errors are already fairly descriptive

[sunrabbit123]

yeah!, but we get test code from eslint test set, so we(or I) need statistics on how well the test code follows them.
Of course, this is only for development.
Im talking about how much progress we have left.

Nothing changes except the line with the emoji at the end.

[auvred]

Why not just https://github.com/gotestyourself/gotestsum?

[sunrabbit123]

good idea, but IMO it's depdendency
I try not to increase my dependence as much as possible.
This is just a personal disposition.