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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Hash#default" do
it "returns the default value" do
h = Hash.new(5)
h.default.should == 5
h.default(4).should == 5
{}.default.should == nil
{}.default(4).should == nil
end
it "uses the default proc to compute a default value, passing given key" do
h = Hash.new { |*args| args }
h.default(nil).should == [h, nil]
h.default(5).should == [h, 5]
end
it "calls default proc with nil arg if passed a default proc but no arg" do
h = Hash.new { |*args| args }
h.default.should == nil
end
end
describe "Hash#default=" do
it "sets the default value" do
h = {}
h.default = 99
h.default.should == 99
end
it "unsets the default proc" do
[99, nil, lambda { 6 }].each do |default|
h = Hash.new { 5 }
h.default_proc.should_not == nil
h.default = default
h.default.should == default
h.default_proc.should == nil
end
end
it "raises a #{frozen_error_class} if called on a frozen instance" do
lambda { HashSpecs.frozen_hash.default = nil }.should raise_error(frozen_error_class)
lambda { HashSpecs.empty_frozen_hash.default = nil }.should raise_error(frozen_error_class)
end
end
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