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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Hash#rehash" do
it "reorganizes the hash by recomputing all key hash codes" do
k1 = [1]
k2 = [2]
h = {}
h[k1] = 0
h[k2] = 1
k1 << 2
h.key?(k1).should == false
h.keys.include?(k1).should == true
h.rehash.should equal(h)
h.key?(k1).should == true
h[k1].should == 0
k1 = mock('k1')
k2 = mock('k2')
v1 = mock('v1')
v2 = mock('v2')
v1.should_not_receive(:hash)
v2.should_not_receive(:hash)
h = { k1 => v1, k2 => v2 }
k1.should_receive(:hash).twice.and_return(0)
k2.should_receive(:hash).twice.and_return(0)
h.rehash
h[k1].should == v1
h[k2].should == v2
end
it "removes duplicate keys" do
a = [1,2]
b = [1]
h = {}
h[a] = true
h[b] = true
b << 2
h.size.should == 2
h.keys.should == [a, b]
h.rehash
h.size.should == 1
h.keys.should == [a]
end
it "raises a #{frozen_error_class} if called on a frozen instance" do
lambda { HashSpecs.frozen_hash.rehash }.should raise_error(frozen_error_class)
lambda { HashSpecs.empty_frozen_hash.rehash }.should raise_error(frozen_error_class)
end
end
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