Ruby – How to run only specific tests in Rspec

rspecruby

I think there's a way to run only tests with a given label. Anybody know?

Best Answer

It isn't easy to find the documentation, but you can tag examples with a hash. Eg.

# spec/my_spec.rb
describe SomeContext do
  it "won't run this" do
    raise "never reached"
  end

  it "will run this", :focus => true do
    1.should == 1
  end
end

$ rspec --tag focus spec/my_spec.rb

More info on GitHub. (anyone with a better link, please advise)

(update)

RSpec is now superbly documented here. See the --tag option section for details.

As of v2.6 this kind of tag can be expressed even more simply by including the configuration option treat_symbols_as_metadata_keys_with_true_values, which allows you to do:

describe "Awesome feature", :awesome do

where :awesome is treated as if it were :awesome => true.

Also see this answer for how to configure RSpec to automatically run 'focused' tests. This works especially well with Guard.

Related Solutions

Ruby – How to run a single test/spec file in RSpec

Or you can skip rake and use the 'rspec' command:

rspec path/to/spec/file.rb

In your case I think as long as your ./spec/db_spec.rb file includes the appropriate helpers, it should work fine.

If you're using an older version of rspec it is:

spec path/to/spec/file.rb

Ruby – How to write a switch statement in Ruby

Ruby uses the case expression instead.

case x
when 1..5
  "It's between 1 and 5"
when 6
  "It's 6"
when "foo", "bar"
  "It's either foo or bar"
when String
  "You passed a string"
else
  "You gave me #{x} -- I have no idea what to do with that."
end

Ruby compares the object in the when clause with the object in the case clause using the === operator. For example, 1..5 === x, and not x === 1..5.

This allows for sophisticated when clauses as seen above. Ranges, classes and all sorts of things can be tested for rather than just equality.

Unlike switch statements in many other languages, Ruby’s case does not have fall-through, so there is no need to end each when with a break. You can also specify multiple matches in a single when clause like when "foo", "bar".

Best Answer

Related Solutions

Ruby – How to run a single test/spec file in RSpec

Ruby – How to write a switch statement in Ruby

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