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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Hash.ruby2_keywords_hash?" do
it "returns false if the Hash is not a keywords Hash" do
Hash.ruby2_keywords_hash?({}).should == false
end
it "returns true if the Hash is a keywords Hash marked by Module#ruby2_keywords" do
obj = Class.new {
ruby2_keywords def m(*args)
args.last
end
}.new
Hash.ruby2_keywords_hash?(obj.m(a: 1)).should == true
end
it "raises TypeError for non-Hash" do
-> { Hash.ruby2_keywords_hash?(nil) }.should raise_error(TypeError)
end
end
describe "Hash.ruby2_keywords_hash" do
it "returns a copy of a Hash and marks the copy as a keywords Hash" do
h = {a: 1}.freeze
kw = Hash.ruby2_keywords_hash(h)
Hash.ruby2_keywords_hash?(h).should == false
Hash.ruby2_keywords_hash?(kw).should == true
kw.should == h
end
it "returns an instance of the subclass if called on an instance of a subclass of Hash" do
h = HashSpecs::MyHash.new
h[:a] = 1
kw = Hash.ruby2_keywords_hash(h)
kw.class.should == HashSpecs::MyHash
Hash.ruby2_keywords_hash?(h).should == false
Hash.ruby2_keywords_hash?(kw).should == true
kw.should == h
end
it "copies instance variables" do
h = {a: 1}
h.instance_variable_set(:@foo, 42)
kw = Hash.ruby2_keywords_hash(h)
kw.instance_variable_get(:@foo).should == 42
end
it "copies the hash internals" do
h = {a: 1}
kw = Hash.ruby2_keywords_hash(h)
h[:a] = 2
kw[:a].should == 1
end
it "raises TypeError for non-Hash" do
-> { Hash.ruby2_keywords_hash(nil) }.should raise_error(TypeError)
end
it "retains the default value" do
hash = Hash.new(1)
Hash.ruby2_keywords_hash(hash).default.should == 1
hash[:a] = 1
Hash.ruby2_keywords_hash(hash).default.should == 1
end
it "retains the default_proc" do
pr = proc { |h, k| h[k] = [] }
hash = Hash.new(&pr)
Hash.ruby2_keywords_hash(hash).default_proc.should == pr
hash[:a] = 1
Hash.ruby2_keywords_hash(hash).default_proc.should == pr
end
ruby_version_is '3.3' do
it "retains compare_by_identity_flag" do
hash = {}.compare_by_identity
Hash.ruby2_keywords_hash(hash).compare_by_identity?.should == true
hash[:a] = 1
Hash.ruby2_keywords_hash(hash).compare_by_identity?.should == true
end
end
end
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