Project: RSpec Expectations 2.2

Publisher: RSpec

Access running example

In order to take advantage of services that are available
in my examples when I'm writing matchers
As a spec author
I want to call methods on the running example

If the method exists in the context of the example, it gets
called. If not, a NoMethodError is raised on the Matcher itself
(not the example).

Scenarios

call method defined on example from matcher

Given

a file named "example_spec.rb" with:

RSpec::Matchers.define :bar do
  match do |_|
    foo == "foo"
  end
end

describe "something" do
  def foo
    "foo"
  end

  it "does something" do
    "foo".should bar
  end
end

When

I run "rspec ./example_spec.rb"

Then

the output should contain "1 example, 0 failures"

call method _not_ defined on example from matcher

Given

a file named "example_spec.rb" with:

RSpec::Matchers.define :bar do
  match do |_|
    foo == "foo"
  end
end

describe "something" do
  it "does something" do
    "foo".should bar
  end
end

When

I run "rspec ./example_spec.rb"

Then

the output should contain "1 example, 1 failure"

And

the output should contain "undefined local variable"

And

the output should contain "RSpec::Matchers::Matcher"

And

the output should not contain "ExampleGroup"

Last published over 5 years ago by dchelimsky.

Access running example

RSpec Expectations settings