SPARK-24714 AnalysisSuite should use ClassTag to check the runtime in…

[chia7712]

…stance

What changes were proposed in this pull request?

Use scala classTag to do the type check.

How was this patch tested?

this PR is against test

Please review http://spark.apache.org/contributing.html before opening a pull request.

[maropu]

I'm not sure this issue should be fixed for test code qualities though, I have one question; is this only a place having this issue?

[chia7712]

I have one question; is this only a place having this issue?`

I grepped the code base by "isInstanceOf[T]". Only one result appears and this PR have fixed it.

[chia7712]

I'm not sure this issue should be fixed for test code qualities though

the bug is obvious but it doesn't impact the test case. At any rate, I'm ok to decline this PR :)

[AmplabJenkins]

Can one of the admins verify this patch?

[github-actions]

We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you'd like to revive this PR, please reopen it and ask a committer to remove the Stale tag!