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require_relative '../../spec_helper'
ruby_version_is "3.4" do
describe "GC.config" do
context "without arguments" do
it "returns a hash of current settings" do
GC.config.should be_kind_of(Hash)
end
it "includes the name of currently loaded GC implementation as a global key" do
GC.config.should include(:implementation)
GC.config[:implementation].should be_kind_of(String)
end
end
context "with a hash of options" do
it "allows to set GC implementation's options, returning the new config" do
config = GC.config({})
# Try to find a boolean setting to reliably test changing it.
key, _value = config.find { |_k, v| v == true }
skip unless key
GC.config(key => false).should == config.merge(key => false)
GC.config[key].should == false
GC.config(key => true).should == config
GC.config[key].should == true
ensure
GC.config(config.except(:implementation))
end
it "does not change settings that aren't present in the hash" do
previous = GC.config
GC.config({})
GC.config.should == previous
end
it "ignores unknown keys" do
previous = GC.config
GC.config(foo: "bar")
GC.config.should == previous
end
it "raises an ArgumentError if options include global keys" do
-> { GC.config(implementation: "default") }.should raise_error(ArgumentError, 'Attempting to set read-only key "Implementation"')
end
end
context "with a non-hash argument" do
it "returns current settings if argument is nil" do
GC.config(nil).should == GC.config
end
it "raises ArgumentError for all other arguments" do
-> { GC.config([]) }.should raise_error(ArgumentError)
-> { GC.config("default") }.should raise_error(ArgumentError)
-> { GC.config(1) }.should raise_error(ArgumentError)
end
end
guard -> { PlatformGuard.standard? && GC.config[:implementation] == "default" } do
context "with default GC implementation on MRI" do
before do
@default_config = GC.config({})
end
after do
GC.config(@default_config.except(:implementation))
end
it "includes :rgengc_allow_full_mark option, true by default" do
GC.config.should include(:rgengc_allow_full_mark)
GC.config[:rgengc_allow_full_mark].should be_true
end
it "allows to set :rgengc_allow_full_mark" do
# This key maps truthy and falsey values to true and false.
GC.config(rgengc_allow_full_mark: nil).should == @default_config.merge(rgengc_allow_full_mark: false)
GC.config(rgengc_allow_full_mark: 1.23).should == @default_config.merge(rgengc_allow_full_mark: true)
end
end
end
end
end
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