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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "String#swapcase" do
it "returns a new string with all uppercase chars from self converted to lowercase and vice versa" do
"Hello".swapcase.should == "hELLO"
"cYbEr_PuNk11".swapcase.should == "CyBeR_pUnK11"
"+++---111222???".swapcase.should == "+++---111222???"
end
it "returns a String in the same encoding as self" do
"Hello".encode("US-ASCII").swapcase.encoding.should == Encoding::US_ASCII
end
describe "full Unicode case mapping" do
it "works for all of Unicode with no option" do
"äÖü".swapcase.should == "ÄöÜ"
end
it "updates string metadata" do
swapcased = "Aßet".swapcase
swapcased.should == "aSSET"
swapcased.size.should == 5
swapcased.bytesize.should == 5
swapcased.ascii_only?.should be_true
end
end
describe "ASCII-only case mapping" do
it "does not swapcase non-ASCII characters" do
"aßet".swapcase(:ascii).should == "AßET"
end
it "works with substrings" do
"prefix aTé"[-3..-1].swapcase(:ascii).should == "Até"
end
end
describe "full Unicode case mapping adapted for Turkic languages" do
it "swaps case of ASCII characters according to Turkic semantics" do
"aiS".swapcase(:turkic).should == "Aİs"
end
it "allows Lithuanian as an extra option" do
"aiS".swapcase(:turkic, :lithuanian).should == "Aİs"
end
it "does not allow any other additional option" do
-> { "aiS".swapcase(:turkic, :ascii) }.should raise_error(ArgumentError)
end
end
describe "full Unicode case mapping adapted for Lithuanian" do
it "currently works the same as full Unicode case mapping" do
"Iß".swapcase(:lithuanian).should == "iSS"
end
it "allows Turkic as an extra option (and applies Turkic semantics)" do
"iS".swapcase(:lithuanian, :turkic).should == "İs"
end
it "does not allow any other additional option" do
-> { "aiS".swapcase(:lithuanian, :ascii) }.should raise_error(ArgumentError)
end
end
it "does not allow the :fold option for upcasing" do
-> { "abc".swapcase(:fold) }.should raise_error(ArgumentError)
end
it "does not allow invalid options" do
-> { "abc".swapcase(:invalid_option) }.should raise_error(ArgumentError)
end
it "returns String instances when called on a subclass" do
StringSpecs::MyString.new("").swapcase.should be_an_instance_of(String)
StringSpecs::MyString.new("hello").swapcase.should be_an_instance_of(String)
end
end
describe "String#swapcase!" do
it "modifies self in place" do
a = "cYbEr_PuNk11"
a.swapcase!.should equal(a)
a.should == "CyBeR_pUnK11"
end
it "modifies self in place for non-ascii-compatible encodings" do
a = "cYbEr_PuNk11".encode("utf-16le")
a.swapcase!
a.should == "CyBeR_pUnK11".encode("utf-16le")
end
describe "full Unicode case mapping" do
it "modifies self in place for all of Unicode with no option" do
a = "äÖü"
a.swapcase!
a.should == "ÄöÜ"
end
it "works for non-ascii-compatible encodings" do
a = "äÖü".encode("utf-16le")
a.swapcase!
a.should == "ÄöÜ".encode("utf-16le")
end
it "updates string metadata" do
swapcased = "Aßet"
swapcased.swapcase!
swapcased.should == "aSSET"
swapcased.size.should == 5
swapcased.bytesize.should == 5
swapcased.ascii_only?.should be_true
end
end
describe "modifies self in place for ASCII-only case mapping" do
it "does not swapcase non-ASCII characters" do
a = "aßet"
a.swapcase!(:ascii)
a.should == "AßET"
end
it "works for non-ascii-compatible encodings" do
a = "aBc".encode("utf-16le")
a.swapcase!(:ascii)
a.should == "AbC".encode("utf-16le")
end
end
describe "modifies self in place for full Unicode case mapping adapted for Turkic languages" do
it "swaps case of ASCII characters according to Turkic semantics" do
a = "aiS"
a.swapcase!(:turkic)
a.should == "Aİs"
end
it "allows Lithuanian as an extra option" do
a = "aiS"
a.swapcase!(:turkic, :lithuanian)
a.should == "Aİs"
end
it "does not allow any other additional option" do
-> { a = "aiS"; a.swapcase!(:turkic, :ascii) }.should raise_error(ArgumentError)
end
end
describe "full Unicode case mapping adapted for Lithuanian" do
it "currently works the same as full Unicode case mapping" do
a = "Iß"
a.swapcase!(:lithuanian)
a.should == "iSS"
end
it "allows Turkic as an extra option (and applies Turkic semantics)" do
a = "iS"
a.swapcase!(:lithuanian, :turkic)
a.should == "İs"
end
it "does not allow any other additional option" do
-> { a = "aiS"; a.swapcase!(:lithuanian, :ascii) }.should raise_error(ArgumentError)
end
end
it "does not allow the :fold option for upcasing" do
-> { a = "abc"; a.swapcase!(:fold) }.should raise_error(ArgumentError)
end
it "does not allow invalid options" do
-> { a = "abc"; a.swapcase!(:invalid_option) }.should raise_error(ArgumentError)
end
it "returns nil if no modifications were made" do
a = "+++---111222???"
a.swapcase!.should == nil
a.should == "+++---111222???"
"".swapcase!.should == nil
end
it "raises a FrozenError when self is frozen" do
["", "hello"].each do |a|
a.freeze
-> { a.swapcase! }.should raise_error(FrozenError)
end
end
end
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