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require_relative '../../../spec_helper'
ruby_version_is "3.3" do
describe "ObjectSpace::WeakKeyMap#[]=" do
def should_accept(map, key, value)
(map[key] = value).should == value
map.should.key?(key)
map[key].should == value
end
it "is correct" do
map = ObjectSpace::WeakKeyMap.new
key1, key2 = %w[a b].map(&:upcase)
ref1, ref2 = %w[x y]
should_accept(map, key1, ref1)
should_accept(map, key1, ref1)
should_accept(map, key2, ref2)
map[key1].should == ref1
end
it "requires the keys to implement #hash" do
map = ObjectSpace::WeakKeyMap.new
-> { map[BasicObject.new] = 1 }.should raise_error(NoMethodError, /undefined method [`']hash' for an instance of BasicObject/)
end
it "accepts frozen keys or values" do
map = ObjectSpace::WeakKeyMap.new
x = Object.new
should_accept(map, x, true)
should_accept(map, x, false)
should_accept(map, x, 42)
should_accept(map, x, :foo)
y = Object.new.freeze
should_accept(map, x, y)
should_accept(map, y, x)
end
it "does not duplicate and freeze String keys (like Hash#[]= does)" do
map = ObjectSpace::WeakKeyMap.new
key = +"a"
map[key] = 1
map.getkey("a").should.equal? key
map.getkey("a").should_not.frozen?
key.should == "a" # keep the key alive until here to keep the map entry
end
context "a key cannot be garbage collected" do
it "raises ArgumentError when Integer is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[1] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
it "raises ArgumentError when Float is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[1.0] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
it "raises ArgumentError when Symbol is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[:a] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
it "raises ArgumentError when true is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[true] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
it "raises ArgumentError when false is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[false] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
it "raises ArgumentError when nil is used as a key" do
map = ObjectSpace::WeakKeyMap.new
-> { map[nil] = "x" }.should raise_error(ArgumentError, /WeakKeyMap (keys )?must be garbage collectable/)
end
end
end
end
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