84 lines
1.8 KiB
Ruby
84 lines
1.8 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Kernel#freeze" do
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it "prevents self from being further modified" do
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o = mock('o')
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o.frozen?.should be_false
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o.freeze
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o.frozen?.should be_true
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end
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it "returns self" do
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o = Object.new
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o.freeze.should equal(o)
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end
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describe "on integers" do
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it "has no effect since they are already frozen" do
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1.frozen?.should be_true
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1.freeze
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bignum = bignum_value
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bignum.frozen?.should be_true
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bignum.freeze
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end
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end
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describe "on a Float" do
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it "has no effect since it is already frozen" do
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1.2.frozen?.should be_true
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1.2.freeze
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end
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end
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describe "on a Symbol" do
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it "has no effect since it is already frozen" do
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:sym.frozen?.should be_true
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:sym.freeze
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end
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end
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describe "on true, false and nil" do
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it "has no effect since they are already frozen" do
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nil.frozen?.should be_true
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true.frozen?.should be_true
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false.frozen?.should be_true
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nil.freeze
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true.freeze
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false.freeze
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end
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end
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describe "on a Complex" do
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it "has no effect since it is already frozen" do
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c = Complex(1.3, 3.1)
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c.frozen?.should be_true
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c.freeze
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end
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end
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describe "on a Rational" do
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it "has no effect since it is already frozen" do
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r = Rational(1, 3)
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r.frozen?.should be_true
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r.freeze
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end
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end
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it "causes mutative calls to raise RuntimeError" do
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o = Class.new do
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def mutate; @foo = 1; end
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end.new
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o.freeze
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-> {o.mutate}.should raise_error(RuntimeError)
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end
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it "causes instance_variable_set to raise RuntimeError" do
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o = Object.new
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o.freeze
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-> {o.instance_variable_set(:@foo, 1)}.should raise_error(RuntimeError)
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end
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end
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