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43 lines
1.3 KiB
Ruby
43 lines
1.3 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'shared/arithmetic_coerce'
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describe "Integer#-" do
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it_behaves_like :integer_arithmetic_coerce_not_rescue, :-
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context "fixnum" do
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it "returns self minus the given Integer" do
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(5 - 10).should == -5
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(9237212 - 5_280).should == 9231932
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(781 - 0.5).should == 780.5
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(2_560_496 - bignum_value).should == -9223372036852215312
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end
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it "raises a TypeError when given a non-Integer" do
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-> {
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(obj = mock('10')).should_receive(:to_int).any_number_of_times.and_return(10)
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13 - obj
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}.should raise_error(TypeError)
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-> { 13 - "10" }.should raise_error(TypeError)
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-> { 13 - :symbol }.should raise_error(TypeError)
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end
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end
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context "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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-> { @bignum - mock('10') }.should raise_error(TypeError)
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-> { @bignum - "10" }.should raise_error(TypeError)
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-> { @bignum - :symbol }.should raise_error(TypeError)
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end
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end
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end
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