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require_relative '../../spec_helper'
describe "Integer#even?" do
context "fixnum" do
it "returns true for a Fixnum when it is an even number" do
(-2).even?.should be_true
(-1).even?.should be_false
0.even?.should be_true
1.even?.should be_false
2.even?.should be_true
end
it "returns true for a Bignum when it is an even number" do
bignum_value(0).even?.should be_true
bignum_value(1).even?.should be_false
(-bignum_value(0)).even?.should be_true
(-bignum_value(1)).even?.should be_false
end
end
context "bignum" do
it "returns true if self is even and positive" do
(10000**10).even?.should be_true
end
it "returns true if self is even and negative" do
(-10000**10).even?.should be_true
end
it "returns false if self is odd and positive" do
(9879**976).even?.should be_false
end
it "returns false if self is odd and negative" do
(-9879**976).even?.should be_false
end
end
end
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