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Diffstat (limited to 'spec/ruby/core/string/shared/dedup.rb')
-rw-r--r-- | spec/ruby/core/string/shared/dedup.rb | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/spec/ruby/core/string/shared/dedup.rb b/spec/ruby/core/string/shared/dedup.rb new file mode 100644 index 0000000000..97b5df6ed1 --- /dev/null +++ b/spec/ruby/core/string/shared/dedup.rb @@ -0,0 +1,56 @@ +# frozen_string_literal: false +describe :string_dedup, shared: true do + it 'returns self if the String is frozen' do + input = 'foo'.freeze + output = input.send(@method) + + output.should equal(input) + output.should.frozen? + end + + it 'returns a frozen copy if the String is not frozen' do + input = 'foo' + output = input.send(@method) + + output.should.frozen? + output.should_not equal(input) + output.should == 'foo' + end + + it "returns the same object for equal unfrozen strings" do + origin = "this is a string" + dynamic = %w(this is a string).join(' ') + + origin.should_not equal(dynamic) + origin.send(@method).should equal(dynamic.send(@method)) + end + + it "returns the same object when it's called on the same String literal" do + "unfrozen string".send(@method).should equal("unfrozen string".send(@method)) + "unfrozen string".send(@method).should_not equal("another unfrozen string".send(@method)) + end + + it "deduplicates frozen strings" do + dynamic = %w(this string is frozen).join(' ').freeze + + dynamic.should_not equal("this string is frozen".freeze) + + dynamic.send(@method).should equal("this string is frozen".freeze) + dynamic.send(@method).should equal("this string is frozen".send(@method).freeze) + end + + it "does not deduplicate a frozen string when it has instance variables" do + dynamic = %w(this string is frozen).join(' ') + dynamic.instance_variable_set(:@a, 1) + dynamic.freeze + + dynamic.send(@method).should_not equal("this string is frozen".freeze) + dynamic.send(@method).should_not equal("this string is frozen".send(@method).freeze) + dynamic.send(@method).should equal(dynamic) + end + + it "interns the provided string if it is frozen" do + dynamic = "this string is unique and frozen #{rand}".freeze + dynamic.send(@method).should equal(dynamic) + end +end |