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require_relative '../../spec_helper'
require_relative '../../shared/hash/key_error'
describe "ENV.fetch" do
it "returns a value" do
ENV["foo"] = "bar"
ENV.fetch("foo").should == "bar"
ENV.delete "foo"
end
it "raises a TypeError if the key is not a String" do
lambda { ENV.fetch :should_never_be_set }.should raise_error(TypeError)
end
context "when the key is not found" do
it_behaves_like :key_error, ->(obj, key) { obj.fetch(key) }, ENV
it "formats the object with #inspect in the KeyError message" do
-> {
ENV.fetch('foo')
}.should raise_error(KeyError, 'key not found: "foo"')
end
end
it "provides the given default parameter" do
ENV.fetch("should_never_be_set", "default").should == "default"
end
it "provides a default value from a block" do
ENV.fetch("should_never_be_set") { |k| "wanted #{k}" }.should == "wanted should_never_be_set"
end
it "warns on block and default parameter given" do
lambda do
ENV.fetch("should_never_be_set", "default") { 1 }.should == 1
end.should complain(/block supersedes default value argument/)
end
it "uses the locale encoding" do
ENV.fetch(ENV.keys.first).encoding.should == Encoding.find('locale')
end
end
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