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require_relative '../../spec_helper'
describe "ENV.slice" do
before :each do
@saved_foo = ENV["foo"]
@saved_bar = ENV["bar"]
ENV["foo"] = "0"
ENV["bar"] = "1"
end
after :each do
ENV["foo"] = @saved_foo
ENV["bar"] = @saved_bar
end
it "returns a hash of the given environment variable names and their values" do
ENV.slice("foo", "bar").should == {"foo" => "0", "bar" => "1"}
end
it "ignores each String that is not an environment variable name" do
ENV.slice("foo", "boo", "bar").should == {"foo" => "0", "bar" => "1"}
end
it "returns the values for the keys coerced with #to_str, but keeps the original objects as result keys" do
foo = mock('key 1')
foo.should_receive(:to_str).and_return("foo")
boo = mock('key 2')
boo.should_receive(:to_str).and_return("boo")
bar = mock('key 3')
bar.should_receive(:to_str).and_return("bar")
ENV.slice(foo, boo, bar).should == {foo => "0", bar => "1"}
end
it "raises TypeError if any argument is not a String and does not respond to #to_str" do
-> { ENV.slice(Object.new) }.should raise_error(TypeError, "no implicit conversion of Object into String")
end
end
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