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require_relative '../../spec_helper'
require_relative '../../shared/hash/key_error'
require_relative 'fixtures/common'
describe "ENV.fetch" do
before :each do
@foo_saved = ENV.delete("foo")
end
after :each do
ENV["foo"] = @saved_foo
end
it "returns a value" do
ENV["foo"] = "bar"
ENV.fetch("foo").should == "bar"
end
it "raises a TypeError if the key is not a String" do
-> { ENV.fetch Object.new }.should raise_error(TypeError, "no implicit conversion of Object into String")
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("foo", "default").should == "default"
end
it "does not insist that the default be a String" do
ENV.fetch("foo", :default).should == :default
end
it "provides a default value from a block" do
ENV.fetch("foo") { |k| "wanted #{k}" }.should == "wanted foo"
end
it "does not insist that the block return a String" do
ENV.fetch("foo") { |k| k.to_sym }.should == :foo
end
it "warns on block and default parameter given" do
-> do
ENV.fetch("foo", "default") { "bar" }.should == "bar"
end.should complain(/block supersedes default value argument/)
end
it "does not evaluate the block when key found" do
ENV["foo"] = "bar"
ENV.fetch("foo") { fail "should not get here"}.should == "bar"
end
it "uses the locale encoding" do
ENV["foo"] = "bar"
ENV.fetch("foo").encoding.should == ENVSpecs.encoding
end
end
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