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require_relative '../spec_helper'
describe "The $SAFE variable" do
ruby_version_is ""..."2.7" do
after :each do
$SAFE = 0
end
it "is 0 by default" do
$SAFE.should == 0
proc {
$SAFE.should == 0
}.call
end
it "can be set to 0" do
proc {
$SAFE = 0
$SAFE.should == 0
}.call
end
it "can be set to 1" do
proc {
$SAFE = 1
$SAFE.should == 1
}.call
end
[2, 3, 4].each do |n|
it "cannot be set to #{n}" do
-> {
proc {
$SAFE = n
}.call
}.should raise_error(ArgumentError, /\$SAFE=2 to 4 are obsolete/)
end
end
it "raises ArgumentError when set to values below 0" do
-> {
proc {
$SAFE = -100
}.call
}.should raise_error(ArgumentError, "$SAFE should be >= 0")
end
it "cannot be set to values above 4" do
-> {
proc {
$SAFE = 100
}.call
}.should raise_error(ArgumentError, /\$SAFE=2 to 4 are obsolete/)
end
it "can be manually lowered" do
$SAFE = 1
$SAFE = 0
$SAFE.should == 0
end
it "is not Proc local" do
$SAFE.should == 0
proc {
$SAFE = 1
}.call
$SAFE.should == 1
end
it "is not lambda local" do
$SAFE.should == 0
-> {
$SAFE = 1
}.call
$SAFE.should == 1
end
it "is global like regular global variables" do
Thread.new { $SAFE }.value.should == 0
$SAFE = 1
Thread.new { $SAFE }.value.should == 1
end
it "can be read when default from Thread#safe_level" do
Thread.current.safe_level.should == 0
end
it "can be read when modified from Thread#safe_level" do
proc {
$SAFE = 1
Thread.current.safe_level.should == 1
}.call
end
end
ruby_version_is "2.7"..."3.0" do
it "warn when access" do
-> {
$SAFE
}.should complain(/\$SAFE will become a normal global variable in Ruby 3.0/)
end
it "warn when set" do
-> {
$SAFE = 1
}.should complain(/\$SAFE will become a normal global variable in Ruby 3.0/)
end
end
ruby_version_is "3.0" do
it "$SAFE is a regular global variable" do
$SAFE.should == nil
$SAFE = 42
$SAFE.should == 42
ensure
$SAFE = nil
end
end
end
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