Use a test helper for rawExtension objects in tests

[shuheiktgw]

Changes

Relates to #796

I've replaced some of the test functions with the RawExtension test helper. Thank you for your review!

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Release Notes

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[tekton-robot]

Hi @shuheiktgw. Thanks for your PR.

I'm waiting for a tektoncd member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[dibyom]

/ok-to-test

[dibyom]

I think we need to run go fmt on the files for the build tests to pass. Otherwise, looks good!

[dibyom]

@shuheiktgw just need to run go fmt on the changed files. Otherwise good to go 😃

[shuheiktgw]

@dibyom So sorry that I didn't notice your message 🙇
Now I fixed it so would you mind reviewing the pr again?

[dibyom]

No worries, looks like we need to run goimports too! (Also, could you squash your commits?)

---

pkg/apis/triggers/v1alpha1/trigger_template_validation_test.go:20: File is not goimports-ed (goimports)
"context"

[shuheiktgw]

@dibyom Sorry I fixed it and squashed the commits! 🙏

[dibyom]

Thank you!
/approve
/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dibyom

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