require_relative '../../spec_helper' require_relative '../enumerable/shared/enumeratorized' describe "ENV.select!" do it "removes environment variables for which the block returns true" do ENV["foo"] = "bar" ENV.select! { |k, v| k != "foo" } ENV["foo"].should == nil end it "returns self if any changes were made" do ENV["foo"] = "bar" ENV.select! { |k, v| k != "foo" }.should == ENV end it "returns nil if no changes were made" do ENV.select! { true }.should == nil end it "returns an Enumerator if called without a block" do ENV.select!.should be_an_instance_of(Enumerator) end it_behaves_like :enumeratorized_with_origin_size, :select!, ENV end describe "ENV.select" do it "returns a Hash of names and values for which block return true" do ENV["foo"] = "bar" ENV.select { |k, v| k == "foo" }.should == {"foo" => "bar"} ENV.delete "foo" end it "returns an Enumerator when no block is given" do ENV.select.should be_an_instance_of(Enumerator) end it_behaves_like :enumeratorized_with_origin_size, :select, ENV end