Recently I have spent some time doing experiments with Opal rb 1.0, to use Ruby in place of Javascript.
Here are some tests that could be useful.
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First steps with Opal 1.0
Rails testing tips for newcomers
Writing effective tests is tricky. A good book that can be helpful is Testing Rails by Thoughtbot
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A Rails middleware to change log level at runtime
Have you ever found the Rails logs too verbose in development? Here it is a small middleware to do it
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Active Admin plugins
New plugins for Active Admin, my favorite backend tool
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Grape projects
Have you ever tried Grape? I found it a very nice alternative for small-medium Ruby projects
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