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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/lambda'
# The functionality of Proc objects is specified in core/proc
describe "Kernel.proc" do
it "is a private method" do
Kernel.should have_private_instance_method(:proc)
end
it "creates a proc-style Proc if given a literal block" do
l = proc { 42 }
l.lambda?.should be_false
end
it "returned the passed Proc if given an existing Proc" do
some_lambda = -> {}
some_lambda.lambda?.should be_true
l = proc(&some_lambda)
l.should equal(some_lambda)
l.lambda?.should be_true
end
it_behaves_like :kernel_lambda, :proc
it "returns from the creation site of the proc, not just the proc itself" do
@reached_end_of_method = nil
def test
proc { return }.call
@reached_end_of_method = true
end
test
@reached_end_of_method.should be_nil
end
end
describe "Kernel#proc" do
ruby_version_is ""..."2.7" do
it "uses the implicit block from an enclosing method" do
def some_method
proc
end
prc = some_method { "hello" }
prc.call.should == "hello"
end
end
ruby_version_is "2.7" do
before :each do
@deprecated = Warning[:deprecated]
Warning[:deprecated] = true
end
after :each do
Warning[:deprecated] = @deprecated
end
it "can be created when called with no block" do
def some_method
proc
end
-> {
some_method { "hello" }
}.should complain(/Capturing the given block using Kernel#proc is deprecated/)
end
end
end
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