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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Hash#initialize" do
it "is private" do
Hash.should have_private_instance_method("initialize")
end
it "can be used to reset default_proc" do
h = { "foo" => 1, "bar" => 2 }
h.default_proc.should == nil
h.send(:initialize) { |_, k| k * 2 }
h.default_proc.should_not == nil
h["a"].should == "aa"
end
it "can be used to reset the default value" do
h = {}
h.default = 42
h.default.should == 42
h.send(:initialize, 1)
h.default.should == 1
h.send(:initialize)
h.default.should == nil
end
it "receives the arguments passed to Hash#new" do
HashSpecs::NewHash.new(:one, :two)[0].should == :one
HashSpecs::NewHash.new(:one, :two)[1].should == :two
end
it "does not change the storage, only the default value or proc" do
h = HashSpecs::SubHashSettingInInitialize.new
h.to_a.should == [[:foo, :bar]]
h = HashSpecs::SubHashSettingInInitialize.new(:default)
h.to_a.should == [[:foo, :bar]]
h = HashSpecs::SubHashSettingInInitialize.new { :default_block }
h.to_a.should == [[:foo, :bar]]
end
it "returns self" do
h = Hash.new
h.send(:initialize).should equal(h)
end
it "raises a FrozenError if called on a frozen instance" do
block = -> { HashSpecs.frozen_hash.instance_eval { initialize() }}
block.should raise_error(FrozenError)
block = -> { HashSpecs.frozen_hash.instance_eval { initialize(nil) } }
block.should raise_error(FrozenError)
block = -> { HashSpecs.frozen_hash.instance_eval { initialize(5) } }
block.should raise_error(FrozenError)
block = -> { HashSpecs.frozen_hash.instance_eval { initialize { 5 } } }
block.should raise_error(FrozenError)
end
end
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