Running minitest produces no output

ruby run minitest
rails minitest
minitest-reporters
minitest setup do
minitest context
minitest spy
minitest-around
minitest::benchmark

I have a file my_test.rb with the following contents:

require 'test/unit'

class MyTest < Test::Unit::TestCase

  # Called before every test method runs. Can be used
  # to set up fixture information.
  def setup
    # Do nothing
  end

  # Called after every test method runs. Can be used to tear
  # down fixture information.

  def teardown
    # Do nothing
  end

  # Fake test
  def dummy_test
    print "Something!"
    fail
  end
end

When I run ruby my_test.rb, there is absolutely no output.

How can I run the unit tests in this file and see whether they are passing or failing?

There's nothing bad with your implementation and your actual code. But in order your dummy_test can execute what's inside its definition, it should be called first; thing you're not doing, that's why when you run your file you don't get any output.

You can create an example test, and there call your dummy_test method:

...

def test_something
  dummy_test
end

# Fake test
def dummy_test
  print "Something!"
  fail
end

Minitest fails to report back · Issue #20 · connorshea/vscode-ruby , When running all tests from ui, no output in console; When running A fix that makes it work is by modifying in minitest the run_one_method  Many tests require that you examine the terminal output of your application. In this section, we’ll examine Minitest’s techniques for testing output. assert_silent. With many applications, methods, etc, the ideal situation is that no output at all is produced.

Test-unit will look for methods that start with "test" and use them as test methods. Your code has a method that ends with "test" but none that start with it, so it doesn’t see any tests to run.

Change the method name from dummy_test to test_dummy and you should see the output you are expecting.

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As said before you are not calling on your function and therefore nothing will happen since ruby does not automatically execute the first / last function.

An example would be to implement this code

...
def main()
    print "Something!"
end

main()

And if you would like to call a function which calls the other functions you will do the same

Example:

def main()
    other_function1()
    other_function2()
end

main()

And the other_functions would be other functions you define and call within the main function.

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Comments
  • Note that minitest and test-unit are different testing libraries. Your code is using test-unit but your title says minitest.