Add EnsureAssetsCompiled feature

[robwise]

[justin808]

Looking good!

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Reviewed 7 of 7 files at r1.
Review status: all files reviewed at latest revision, 5 unresolved discussions.

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docs/additional_reading/rspec_configuration.md, line 2 [r1] (raw file):
If you did use stale Webpack assets, you will get invalid test results as your tests do not use the very latest JavaScript code.

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docs/additional_reading/rspec_configuration.md, line 4 [r1] (raw file):
@samnang Please review. I'm pretty sure we need to pass config.

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docs/additional_reading/rspec_configuration.md, line 6 [r1] (raw file):
and only if you do not have the webpack -w processes that would build the generated files.

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docs/additional_reading/rspec_configuration.md, line 8 [r1] (raw file):
per my prior statement. I would not mention TDD workflow.

If you do not want to be slowed down by re-compiling webpack assets from scratch every test run, you can call ...

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README.md, line 379 [r1] (raw file):
👍

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Comments from the review on Reviewable.io

[robwise]

Review status: all files reviewed at latest revision, 4 unresolved discussions.

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docs/additional_reading/rspec_configuration.md, line 2 [r1] (raw file):
Done.

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docs/additional_reading/rspec_configuration.md, line 6 [r1] (raw file):
see below I address that next

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docs/additional_reading/rspec_configuration.md, line 8 [r1] (raw file):
what prior statement?

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Comments from the review on Reviewable.io

[justin808]

🎉 👏

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Reviewed 2 of 2 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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Comments from the review on Reviewable.io

[samnang]

docs/additional_reading/rspec_configuration.md, line 4 [r1] (raw file):
@justin808 @robwise Great stuff. I have few comments on this:

1. instead of doing before(:example), we should use before(:suite).
2. Instead letting users of our gem to know about the method and we need to expose that, we just have lib/react_on_rails/rspec file helper, so the user just require that file react_on_rails/rspec in their rails helper to have this integration helper.

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Comments from the review on Reviewable.io

[robwise]

Review status: all files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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docs/additional_reading/rspec_configuration.md, line 4 [r1] (raw file):
@samnang

1. If I do before suite, the thing will compile webpack bundles even if the user is just doing a quick unit test that has nothing to do with webpack.
2. We need access to the RSpec config, so we have to have the user pass it as a variable. Also, there was an issue where if we have auto-executing code on require, then this runs twice (once on requiring of the gem by Rails, once on requiring in the rails helper)

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Comments from the review on Reviewable.io