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require_relative '../../spec_helper'
ruby_version_is "2.7" do
describe "Proc#ruby2_keywords" do
it "marks the final hash argument as keyword hash" do
f = -> *a { a.last }
f.ruby2_keywords
last = f.call(1, 2, a: "a")
Hash.ruby2_keywords_hash?(last).should == true
end
ruby_version_is "2.7" ... "3.0" do
it "fixes delegation warnings when calling a method accepting keywords" do
obj = Object.new
def obj.foo(*a, **b) end
f = -> *a { obj.foo(*a) }
-> { f.call(1, 2, {a: "a"}) }.should complain(/Using the last argument as keyword parameters is deprecated/)
f.ruby2_keywords
-> { f.call(1, 2, {a: "a"}) }.should_not complain
end
it "fixes delegation warnings when calling a proc accepting keywords" do
g = -> *a, **b { }
f = -> *a { g.call(*a) }
-> { f.call(1, 2, {a: "a"}) }.should complain(/Using the last argument as keyword parameters is deprecated/)
f.ruby2_keywords
-> { f.call(1, 2, {a: "a"}) }.should_not complain
end
end
it "returns self" do
f = -> *a { }
f.ruby2_keywords.should equal f
end
it "prints warning when a proc does not accept argument splat" do
f = -> a, b, c { }
-> {
f.ruby2_keywords
}.should complain(/Skipping set of ruby2_keywords flag for/)
end
it "prints warning when a proc accepts keywords" do
f = -> a:, b: { }
-> {
f.ruby2_keywords
}.should complain(/Skipping set of ruby2_keywords flag for/)
end
it "prints warning when a proc accepts keyword splat" do
f = -> **a { }
-> {
f.ruby2_keywords
}.should complain(/Skipping set of ruby2_keywords flag for/)
end
end
end
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