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Versions: 3
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Contents
require "spec_helper"
require "hamster/hash"
describe Hamster::Hash do
let(:hash) { H["a" => 1, "b" => 2, "c" => 3, "d" => 4] }
let(:partition) { hash.partition { |k,v| v % 2 == 0 }}
describe "#partition" do
it "returns a pair of Hamster::Hashes" do
partition.each { |h| h.class.should be(Hamster::Hash) }
partition.should be_frozen
end
it "returns key/val pairs for which predicate is true in first Hash" do
partition[0].should == {"b" => 2, "d" => 4}
end
it "returns key/val pairs for which predicate is false in second Hash" do
partition[1].should == {"a" => 1, "c" => 3}
end
it "doesn't modify the original Hash" do
partition
hash.should eql(H["a" => 1, "b" => 2, "c" => 3, "d" => 4])
end
context "from a subclass" do
it "should return instances of the subclass" do
subclass = Class.new(Hamster::Hash)
instance = subclass.new("a" => 1, "b" => 2, "c" => 3, "d" => 4)
partition = instance.partition { |k,v| v % 2 == 0 }
partition.each { |h| h.class.should be(subclass) }
end
end
end
end
Version data entries
3 entries across 3 versions & 2 rubygems