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require_relative 'spec_helper'
require_relative 'shared/to_hash'
describe "ENV.to_h" do
it_behaves_like :env_to_hash, :to_h
context "with block" do
before do
@orig_hash = ENV.to_hash
end
after do
ENV.replace @orig_hash
end
it "converts [key, value] pairs returned by the block to a hash" do
ENV.replace("a" => "b", "c" => "d")
ENV.to_h { |k, v| [k, v.upcase] }.should == { 'a' => "B", 'c' => "D" }
end
it "does not require the array elements to be strings" do
ENV.replace("a" => "b", "c" => "d")
ENV.to_h { |k, v| [k.to_sym, v.to_sym] }.should == { :a => :b, :c => :d }
end
it "raises ArgumentError if block returns longer or shorter array" do
-> do
ENV.to_h { |k, v| [k, v.upcase, 1] }
end.should raise_error(ArgumentError, /element has wrong array length/)
-> do
ENV.to_h { |k, v| [k] }
end.should raise_error(ArgumentError, /element has wrong array length/)
end
it "raises TypeError if block returns something other than Array" do
-> do
ENV.to_h { |k, v| "not-array" }
end.should raise_error(TypeError, /wrong element type String/)
end
it "coerces returned pair to Array with #to_ary" do
x = mock('x')
x.stub!(:to_ary).and_return([:b, 'b'])
ENV.to_h { |k| x }.should == { :b => 'b' }
end
it "does not coerce returned pair to Array with #to_a" do
x = mock('x')
x.stub!(:to_a).and_return([:b, 'b'])
-> do
ENV.to_h { |k| x }
end.should raise_error(TypeError, /wrong element type MockObject/)
end
end
end
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