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Diffstat (limited to 'spec/ruby/core/string/downcase_spec.rb')
-rw-r--r-- | spec/ruby/core/string/downcase_spec.rb | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/spec/ruby/core/string/downcase_spec.rb b/spec/ruby/core/string/downcase_spec.rb new file mode 100644 index 0000000000..9ebc4f2bd1 --- /dev/null +++ b/spec/ruby/core/string/downcase_spec.rb @@ -0,0 +1,65 @@ +# -*- encoding: utf-8 -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) + +describe "String#downcase" do + it "returns a copy of self with all uppercase letters downcased" do + "hELLO".downcase.should == "hello" + "hello".downcase.should == "hello" + end + + ruby_version_is ''...'2.4' do + it "is locale insensitive (only replaces A-Z)" do + "ÄÖÜ".downcase.should == "ÄÖÜ" + + str = Array.new(256) { |c| c.chr }.join + expected = Array.new(256) do |i| + c = i.chr + c.between?("A", "Z") ? c.downcase : c + end.join + + str.downcase.should == expected + end + end + + ruby_version_is '2.4' do + it "works for all of Unicode" do + "ÄÖÜ".downcase.should == "äöü" + end + end + + it "taints result when self is tainted" do + "".taint.downcase.tainted?.should == true + "x".taint.downcase.tainted?.should == true + "X".taint.downcase.tainted?.should == true + end + + it "returns a subclass instance for subclasses" do + StringSpecs::MyString.new("FOObar").downcase.should be_an_instance_of(StringSpecs::MyString) + end +end + +describe "String#downcase!" do + it "modifies self in place" do + a = "HeLlO" + a.downcase!.should equal(a) + a.should == "hello" + end + + it "returns nil if no modifications were made" do + a = "hello" + a.downcase!.should == nil + a.should == "hello" + end + + it "raises a RuntimeError when self is frozen" do + lambda { "HeLlo".freeze.downcase! }.should raise_error(RuntimeError) + lambda { "hello".freeze.downcase! }.should raise_error(RuntimeError) + end + + with_feature :encoding do + it "sets the result String encoding to the source String encoding" do + "ABC".downcase.encoding.should equal(Encoding::UTF_8) + end + end +end |