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RSpec.describe RSpec::Rails::AssertionDelegator do
it "provides a module that delegates assertion methods to an isolated class" do
klass = Class.new {
include RSpec::Rails::AssertionDelegator.new(RSpec::Rails::Assertions)
}
expect(klass.new).to respond_to(:assert)
end
it "delegates back to the including instance for methods the assertion module requires" do
assertions = Module.new {
def has_thing?(thing)
things.include?(thing)
end
}
klass = Class.new {
include RSpec::Rails::AssertionDelegator.new(assertions)
def things
[:a]
end
}
expect(klass.new).to have_thing(:a)
expect(klass.new).not_to have_thing(:b)
end
it "does not delegate method_missing" do
assertions = Module.new {
def method_missing(method, *args)
end
}
klass = Class.new {
include RSpec::Rails::AssertionDelegator.new(assertions)
}
expect { klass.new.abc123 }.to raise_error(NoMethodError)
end
end
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