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79 lines
2.4 KiB
Ruby
79 lines
2.4 KiB
Ruby
require_relative '../../spec_helper'
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describe 'String#-@' do
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it 'returns self if the String is frozen' do
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input = 'foo'.freeze
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output = -input
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output.should equal(input)
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output.should.frozen?
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end
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it 'returns a frozen copy if the String is not frozen' do
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input = 'foo'
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output = -input
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output.should.frozen?
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output.should_not equal(input)
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output.should == 'foo'
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end
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it "returns the same object for equal unfrozen strings" do
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origin = "this is a string"
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dynamic = %w(this is a string).join(' ')
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origin.should_not equal(dynamic)
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(-origin).should equal(-dynamic)
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end
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it "returns the same object when it's called on the same String literal" do
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(-"unfrozen string").should equal(-"unfrozen string")
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(-"unfrozen string").should_not equal(-"another unfrozen string")
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end
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ruby_version_is ""..."2.6" do
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it "does not deduplicate already frozen strings" do
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dynamic = %w(this string is frozen).join(' ').freeze
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dynamic.should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal(-"this string is frozen".freeze)
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(-dynamic).should == "this string is frozen"
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end
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it "does not deduplicate tainted strings" do
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dynamic = %w(this string is frozen).join(' ')
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dynamic.taint
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(-dynamic).should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal(-"this string is frozen".freeze)
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(-dynamic).should == "this string is frozen"
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end
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it "does not deduplicate strings with additional instance variables" do
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dynamic = %w(this string is frozen).join(' ')
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dynamic.instance_variable_set(:@foo, :bar)
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(-dynamic).should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal(-"this string is frozen".freeze)
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(-dynamic).should == "this string is frozen"
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end
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end
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ruby_version_is "2.6" do
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it "deduplicates frozen strings" do
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dynamic = %w(this string is frozen).join(' ').freeze
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dynamic.should_not equal("this string is frozen".freeze)
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(-dynamic).should equal("this string is frozen".freeze)
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(-dynamic).should equal(-"this string is frozen".freeze)
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end
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end
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ruby_version_is "3.0" do
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it "interns the provided string if it is frozen" do
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dynamic = "this string is unique and frozen #{rand}".freeze
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(-dynamic).should equal(dynamic)
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end
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end
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end
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