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require File.expand_path('../../../spec_helper', __FILE__)
ruby_version_is "1.9" do
describe "ENV.keep_if" do
it "deletes pairs if the block returns false" do
ENV["foo"] = "bar"
ENV.keep_if { |k, v| k != "foo" }
ENV["foo"].should == nil
end
it "returns ENV even if nothing deleted" do
ENV.keep_if { true }.should_not == nil
end
it "returns an Enumerator if no block given" do
ENV.keep_if.should be_an_instance_of(enumerator_class)
end
it "deletes pairs through enumerator" do
ENV["foo"] = "bar"
enum = ENV.keep_if
enum.each { |k, v| k != "foo" }
ENV["foo"].should == nil
end
end
end
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