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Versions: 3
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Stored size: 1.14 KB
Contents
require "spec_helper"
require "hamster/hash"
describe Hamster::Hash do
describe "#empty?" do
[
[[], true],
[["A" => "aye"], false],
[["A" => "aye", "B" => "bee", "C" => "see"], false],
].each do |pairs, result|
it "returns #{result} for #{pairs.inspect}" do
H[*pairs].empty?.should == result
end
end
it "returns true for empty hashes which have a default block" do
H.new { 'default' }.empty?.should == true
end
end
describe ".empty" do
it "returns the canonical empty Hash" do
H.empty.should be_empty
H.empty.should be(Hamster::EmptyHash)
end
context "from a subclass" do
it "returns an empty instance of the subclass" do
subclass = Class.new(Hamster::Hash)
subclass.empty.class.should be subclass
subclass.empty.should be_empty
end
it "calls overridden #initialize when creating empty Hash" do
subclass = Class.new(Hamster::Hash) do
def initialize
@variable = 'value'
end
end
subclass.empty.instance_variable_get(:@variable).should == 'value'
end
end
end
end
Version data entries
3 entries across 3 versions & 2 rubygems