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20 lines
615 B
Ruby
20 lines
615 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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describe "Bignum#-" do
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before :each do
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@bignum = bignum_value(314)
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end
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it "returns self minus the given Integer" do
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(@bignum - 9).should == 9223372036854776113
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(@bignum - 12.57).should be_close(9223372036854776109.43, TOLERANCE)
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(@bignum - bignum_value(42)).should == 272
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end
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it "raises a TypeError when given a non-Integer" do
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lambda { @bignum - mock('10') }.should raise_error(TypeError)
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lambda { @bignum - "10" }.should raise_error(TypeError)
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lambda { @bignum - :symbol }.should raise_error(TypeError)
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end
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end
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