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# -*- encoding: us-ascii -*-
require_relative '../../spec_helper'
describe "Enumerator#initialize" do
before :each do
@uninitialized = Enumerator.allocate
end
it "is a private method" do
Enumerator.should have_private_instance_method(:initialize, false)
end
it "returns self when given a block" do
@uninitialized.send(:initialize) {}.should equal(@uninitialized)
end
# Maybe spec should be broken up?
it "accepts a block" do
@uninitialized.send(:initialize) do |yielder|
r = yielder.yield 3
yielder << r << 2 << 1
end
@uninitialized.should be_an_instance_of(Enumerator)
r = []
@uninitialized.each{|x| r << x; x * 2}
r.should == [3, 6, 2, 1]
end
it "sets size to nil if size is not given" do
@uninitialized.send(:initialize) {}.size.should be_nil
end
it "sets size to nil if the given size is nil" do
@uninitialized.send(:initialize, nil) {}.size.should be_nil
end
it "sets size to the given size if the given size is Float::INFINITY" do
@uninitialized.send(:initialize, Float::INFINITY) {}.size.should equal(Float::INFINITY)
end
it "sets size to the given size if the given size is an Integer" do
@uninitialized.send(:initialize, 100) {}.size.should == 100
end
it "sets size to the given size if the given size is a Proc" do
@uninitialized.send(:initialize, -> { 200 }) {}.size.should == 200
end
describe "on frozen instance" do
it "raises a FrozenError" do
-> {
@uninitialized.freeze.send(:initialize) {}
}.should raise_error(FrozenError)
end
end
end
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