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require 'spec_helper'
require 'bigdecimal'
describe Immutable::Hash do
let(:hash) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }
describe '#eql?' do
it 'returns false when comparing with a standard hash' do
hash.eql?('A' => 'aye', 'B' => 'bee', 'C' => 'see').should == false
end
it 'returns false when comparing with an arbitrary object' do
hash.eql?(Object.new).should == false
end
it 'returns false when comparing with a subclass of Immutable::Hash' do
subclass = Class.new(Immutable::Hash)
instance = subclass.new('A' => 'aye', 'B' => 'bee', 'C' => 'see')
hash.eql?(instance).should == false
end
end
describe '#==' do
it 'returns true when comparing with a standard hash' do
(hash == {'A' => 'aye', 'B' => 'bee', 'C' => 'see'}).should == true
end
it 'returns false when comparing with an arbitrary object' do
(hash == Object.new).should == false
end
it 'returns true when comparing with a subclass of Immutable::Hash' do
subclass = Class.new(Immutable::Hash)
instance = subclass.new('A' => 'aye', 'B' => 'bee', 'C' => 'see')
(hash == instance).should == true
end
it 'performs numeric conversions between floats and BigDecimals' do
expect(H[a: 0.0] == H[a: BigDecimal('0.0')]).to be true
expect(H[a: BigDecimal('0.0')] == H[a: 0.0]).to be true
end
end
[:eql?, :==].each do |method|
describe "##{method}" do
[
[{}, {}, true],
[{ 'A' => 'aye' }, {}, false],
[{}, { 'A' => 'aye' }, false],
[{ 'A' => 'aye' }, { 'A' => 'aye' }, true],
[{ 'A' => 'aye' }, { 'B' => 'bee' }, false],
[{ 'A' => 'aye', 'B' => 'bee' }, { 'A' => 'aye' }, false],
[{ 'A' => 'aye' }, { 'A' => 'aye', 'B' => 'bee' }, false],
[{ 'A' => 'aye', 'B' => 'bee', 'C' => 'see' }, { 'A' => 'aye', 'B' => 'bee', 'C' => 'see' }, true],
[{ 'C' => 'see', 'A' => 'aye', 'B' => 'bee' }, { 'A' => 'aye', 'B' => 'bee', 'C' => 'see' }, true],
].each do |a, b, expected|
describe "returns #{expected.inspect}" do
it "for #{a.inspect} and #{b.inspect}" do
H[a].send(method, H[b]).should == expected
end
it "for #{b.inspect} and #{a.inspect}" do
H[b].send(method, H[a]).should == expected
end
end
end
end
end
it 'returns true on a large hash which is modified and then modified back again' do
hash = H.new((1..1000).zip(2..1001))
hash.put('a', 1).delete('a').should == hash
hash.put('b', 2).delete('b').should eql(hash)
end
end
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