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-rw-r--r--spec/ruby/core/string/shared/dedup.rb56
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
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+++ b/spec/ruby/core/string/shared/dedup.rb
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+# 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