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require_relative '../../spec_helper'
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
it "applies to the underlying method and applies across duplication" do
f1 = -> *a { a.last }
f1.ruby2_keywords
f2 = f1.dup
Hash.ruby2_keywords_hash?(f1.call(1, 2, a: "a")).should == true
Hash.ruby2_keywords_hash?(f2.call(1, 2, a: "a")).should == true
f3 = -> *a { a.last }
f4 = f3.dup
f3.ruby2_keywords
Hash.ruby2_keywords_hash?(f3.call(1, 2, a: "a")).should == true
Hash.ruby2_keywords_hash?(f4.call(1, 2, a: "a")).should == true
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
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