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describe :env_select, shared: true do
before :each do
@saved_foo = ENV["foo"]
end
after :each do
ENV["foo"] = @saved_foo
end
it "returns a Hash of names and values for which block return true" do
ENV["foo"] = "bar"
(ENV.send(@method) { |k, v| k == "foo" }).should == { "foo" => "bar" }
end
it "returns an Enumerator when no block is given" do
enum = ENV.send(@method)
enum.should be_an_instance_of(Enumerator)
end
it "selects via the enumerator" do
enum = ENV.send(@method)
ENV["foo"] = "bar"
enum.each { |k, v| k == "foo" }.should == { "foo" => "bar"}
end
end
describe :env_select!, shared: true do
before :each do
@saved_foo = ENV["foo"]
end
after :each do
ENV["foo"] = @saved_foo
end
it "removes environment variables for which the block returns true" do
ENV["foo"] = "bar"
ENV.send(@method) { |k, v| k != "foo" }
ENV["foo"].should == nil
end
it "returns self if any changes were made" do
ENV["foo"] = "bar"
(ENV.send(@method) { |k, v| k != "foo" }).should == ENV
end
it "returns nil if no changes were made" do
(ENV.send(@method) { true }).should == nil
end
it "returns an Enumerator if called without a block" do
ENV.send(@method).should be_an_instance_of(Enumerator)
end
it "selects via the enumerator" do
enum = ENV.send(@method)
ENV["foo"] = "bar"
enum.each { |k, v| k != "foo" }
ENV["foo"].should == nil
end
end
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