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22 lines
616 B
Ruby
22 lines
616 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'prime'
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describe "Prime.instance" do
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it "returns a object representing the set of prime numbers" do
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Prime.instance.should be_kind_of(Prime)
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end
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it "returns a object with no obsolete features" do
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Prime.instance.should_not respond_to(:succ)
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Prime.instance.should_not respond_to(:next)
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end
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it "does not complain anything" do
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lambda { Prime.instance }.should_not complain
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end
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it "raises a ArgumentError when is called with some arguments" do
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lambda { Prime.instance(1) }.should raise_error(ArgumentError)
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end
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end
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