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require_relative '../../spec_helper'
require_relative '../enumerable/fixtures/classes'
describe "Enumerable#to_set" do
it "returns a new Set created from self" do
(1..4).to_set.should == Set[1, 2, 3, 4]
(1...4).to_set.should == Set[1, 2, 3]
end
it "passes down passed blocks" do
(1..3).to_set { |x| x * x }.should == Set[1, 4, 9]
end
ruby_version_is "4.0" do
it "raises a RangeError if the range is infinite" do
-> { (1..).to_set }.should raise_error(RangeError, "cannot convert endless range to a set")
-> { (1...).to_set }.should raise_error(RangeError, "cannot convert endless range to a set")
end
end
ruby_version_is ""..."4.0" do
it "instantiates an object of provided as the first argument set class" do
set = (1..3).to_set(EnumerableSpecs::SetSubclass)
set.should be_kind_of(EnumerableSpecs::SetSubclass)
set.to_a.sort.should == [1, 2, 3]
end
end
ruby_version_is "4.0"..."4.1" do
it "instantiates an object of provided as the first argument set class and warns" do
set = nil
proc {
set = (1..3).to_set(EnumerableSpecs::SetSubclass)
}.should complain(/Enumerable#to_set/)
set.should be_kind_of(EnumerableSpecs::SetSubclass)
set.to_a.sort.should == [1, 2, 3]
end
end
ruby_version_is "4.1" do
it "does not accept any positional argument" do
-> {
(1..3).to_set(EnumerableSpecs::SetSubclass)
}.should raise_error(ArgumentError, 'wrong number of arguments (given 1, expected 0)')
end
end
it "does not need explicit `require 'set'`" do
output = ruby_exe(<<~RUBY, options: '--disable-gems', args: '2>&1')
puts (1..3).to_set.to_a.inspect
RUBY
output.chomp.should == "[1, 2, 3]"
end
end
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