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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Hash#delete" do
it "removes the entry and returns the deleted value" do
h = new_hash(:a => 5, :b => 2)
h.delete(:b).should == 2
h.should == new_hash(:a => 5)
end
it "calls supplied block if the key is not found" do
new_hash(:a => 1, :b => 10, :c => 100).delete(:d) { 5 }.should == 5
new_hash(:default).delete(:d) { 5 }.should == 5
new_hash { :defualt }.delete(:d) { 5 }.should == 5
end
it "returns nil if the key is not found when no block is given" do
new_hash(:a => 1, :b => 10, :c => 100).delete(:d).should == nil
new_hash(:default).delete(:d).should == nil
new_hash { :defualt }.delete(:d).should == nil
end
it "accepts keys with private #hash method" do
key = HashSpecs::KeyWithPrivateHash.new
new_hash(key => 5).delete(key).should == 5
end
ruby_version_is "" ... "1.9" do
it "raises a TypeError if called on a frozen instance" do
lambda { HashSpecs.frozen_hash.delete("foo") }.should raise_error(TypeError)
lambda { HashSpecs.empty_frozen_hash.delete("foo") }.should raise_error(TypeError)
end
end
ruby_version_is "1.9" do
it "raises a RuntimeError if called on a frozen instance" do
lambda { HashSpecs.frozen_hash.delete("foo") }.should raise_error(RuntimeError)
lambda { HashSpecs.empty_frozen_hash.delete("foo") }.should raise_error(RuntimeError)
end
end
end
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