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As something of an academic exercise, I thought I'd try to get my unit tests running without loading the Rails env (or hitting the database).
I've seen this done before, and it seems like folks talk about it enough, but I can't find any good/current resources on getting it done.
Does anyone have any good stories or a nice long blog post about how to do this?
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Database access falls outside the scope of unit testing, so you would not write unit tests that include database access. You would include database access testing in your functional tests. Similarly, if you have a network app, you would not include network access in your unit tests.
We can run all of our tests at once by using the bin/rails test command. Or we can run a single test file by passing the bin/rails test command the filename containing the test cases. This will run all test methods from the test case.
To run a Minitest test, the only setup you really need is to require the autorun file at the beginning of a test file: require 'minitest/autorun' . This is good if you'd like to keep the code small. A better way to get started with Minitest is to have Bundler create a template project for you.
What is Minitest? Minitest is a testing suite for Ruby. It provides a complete suite of testing facilities supporting test-driven development (TDD), behavior-driven development (BDD), mocking, and benchmarking. It's small, fast, and it aims to make tests clean and readable.
An useful link: testing Rails without Rails
Testing without database would involve much mocks & stubs, nothing special to add.
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