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require 'spec_helper'
describe "a matcher defined using the matcher DSL" do
def question?
:answer
end
def ok
"ok"
end
it "supports calling custom matchers from within other custom matchers" do
RSpec::Matchers.define :be_ok do
match { |actual| actual == ok }
end
RSpec::Matchers.define :be_well do
match { |actual| expect(actual).to be_ok }
end
expect(ok).to be_well
end
it "has access to methods available in the scope of the example" do
RSpec::Matchers::define(:matcher_a) {}
expect(matcher_a.question?).to eq(:answer)
end
it "raises when method is missing from local scope as well as matcher" do
RSpec::Matchers::define(:matcher_b) {}
expect { matcher_b.i_dont_exist }.to raise_error(NameError)
end
it "clears user instance variables between invocations" do
RSpec::Matchers::define(:be_just_like) do |expected|
match do |actual|
@foo ||= expected
@foo == actual
end
end
expect(3).to be_just_like(3)
expect(4).to be_just_like(4)
end
describe "#respond_to?" do
it "returns true for methods in example scope" do
RSpec::Matchers::define(:matcher_c) {}
expect(matcher_c).to respond_to(:question?)
end
it "returns false for methods not defined in matcher or example scope" do
RSpec::Matchers::define(:matcher_d) {}
expect(matcher_d).not_to respond_to(:i_dont_exist)
end
end
end
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