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require File.expand_path('../../../enumerable/shared/enumeratorized', __FILE__)
describe :keep_if, shared: true do
it "deletes elements for which the block returns a false value" do
array = [1, 2, 3, 4, 5]
array.send(@method) {|item| item > 3 }.should equal(array)
array.should == [4, 5]
end
it "returns an enumerator if no block is given" do
[1, 2, 3].send(@method).should be_an_instance_of(Enumerator)
end
it "updates the receiver after all blocks" do
a = [1, 2, 3]
a.send(@method) do |e|
a.length.should == 3
false
end
a.length.should == 0
end
before :all do
@object = [1,2,3]
end
it_should_behave_like :enumeratorized_with_origin_size
describe "on frozen objects" do
before :each do
@origin = [true, false]
@frozen = @origin.dup.freeze
end
it "returns an Enumerator if no block is given" do
@frozen.send(@method).should be_an_instance_of(Enumerator)
end
describe "with truthy block" do
it "keeps elements after any exception" do
lambda { @frozen.send(@method) { true } }.should raise_error(Exception)
@frozen.should == @origin
end
it "raises a RuntimeError" do
lambda { @frozen.send(@method) { true } }.should raise_error(RuntimeError)
end
end
describe "with falsy block" do
it "keeps elements after any exception" do
lambda { @frozen.send(@method) { false } }.should raise_error(Exception)
@frozen.should == @origin
end
it "raises a RuntimeError" do
lambda { @frozen.send(@method) { false } }.should raise_error(RuntimeError)
end
end
end
end
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