Sha256: 95562ae95f8a179bc372d656b6cbbe7ce4e24bb9cc7ab07d1c8e90a5ed11ee20
Contents?: true
Size: 1.11 KB
Versions: 3
Compression:
Stored size: 1.11 KB
Contents
require "spec_helper"
require "hamster/set"
describe Hamster::Set do
describe "#empty?" do
[
[[], true],
[["A"], false],
[%w[A B C], false],
[[nil], false],
[[false], false]
].each do |values, expected|
describe "on #{values.inspect}" do
it "returns #{expected.inspect}" do
S[*values].empty?.should == expected
end
end
end
end
describe ".empty" do
it "returns the canonical empty set" do
S.empty.should be_empty
S.empty.object_id.should be(S[].object_id)
S.empty.should be(Hamster::EmptySet)
end
context "from a subclass" do
it "returns an empty instance of the subclass" do
subclass = Class.new(Hamster::Set)
subclass.empty.class.should be(subclass)
subclass.empty.should be_empty
end
it "calls overridden #initialize when creating empty Set" do
subclass = Class.new(Hamster::Set) 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