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require_relative '../../spec_helper'
require_relative 'shared/arithmetic_coerce'
describe "Integer#/" do
it_behaves_like :integer_arithmetic_coerce_not_rescue, :/
context "fixnum" do
it "returns self divided by the given argument" do
(2 / 2).should == 1
(3 / 2).should == 1
end
it "supports dividing negative numbers" do
(-1 / 10).should == -1
(-1 / 10**10).should == -1
(-1 / 10**20).should == -1
end
it "preservers sign correctly" do
(4 / 3).should == 1
(4 / -3).should == -2
(-4 / 3).should == -2
(-4 / -3).should == 1
(0 / -3).should == 0
(0 / 3).should == 0
end
it "returns result the same class as the argument" do
(3 / 2).should == 1
(3 / 2.0).should == 1.5
(3 / Rational(2, 1)).should == Rational(3, 2)
end
it "raises a ZeroDivisionError if the given argument is zero and not a Float" do
-> { 1 / 0 }.should raise_error(ZeroDivisionError)
end
it "does NOT raise ZeroDivisionError if the given argument is zero and is a Float" do
(1 / 0.0).to_s.should == 'Infinity'
(-1 / 0.0).to_s.should == '-Infinity'
end
it "coerces fixnum and return self divided by other" do
(-1 / 50.4).should be_close(-0.0198412698412698, TOLERANCE)
(1 / bignum_value).should == 0
end
it "raises a TypeError when given a non-Integer" do
-> { 13 / mock('10') }.should raise_error(TypeError)
-> { 13 / "10" }.should raise_error(TypeError)
-> { 13 / :symbol }.should raise_error(TypeError)
end
end
context "bignum" do
before :each do
@bignum = bignum_value(88)
end
it "returns self divided by other" do
(@bignum / 4).should == 4611686018427387926
(@bignum / bignum_value(2)).should == 1
(-(10**50) / -(10**40 + 1)).should == 9999999999
((10**50) / (10**40 + 1)).should == 9999999999
((-10**50) / (10**40 + 1)).should == -10000000000
((10**50) / -(10**40 + 1)).should == -10000000000
end
it "preservers sign correctly" do
(4 / bignum_value).should == 0
(4 / -bignum_value).should == -1
(-4 / bignum_value).should == -1
(-4 / -bignum_value).should == 0
(0 / bignum_value).should == 0
(0 / -bignum_value).should == 0
end
it "returns self divided by Float" do
not_supported_on :opal do
(bignum_value(88) / 4294967295.0).should be_close(4294967297.0, TOLERANCE)
end
(bignum_value(88) / 4294967295.5).should be_close(4294967296.5, TOLERANCE)
end
it "returns result the same class as the argument" do
(@bignum / 4).should == 4611686018427387926
(@bignum / 4.0).should be_close(4611686018427387926, TOLERANCE)
(@bignum / Rational(4, 1)).should == Rational(4611686018427387926, 1)
end
it "does NOT raise ZeroDivisionError if other is zero and is a Float" do
(bignum_value / 0.0).to_s.should == 'Infinity'
(bignum_value / -0.0).to_s.should == '-Infinity'
end
it "raises a ZeroDivisionError if other is zero and not a Float" do
-> { @bignum / 0 }.should raise_error(ZeroDivisionError)
end
it "raises a TypeError when given a non-numeric" do
-> { @bignum / mock('10') }.should raise_error(TypeError)
-> { @bignum / "2" }.should raise_error(TypeError)
-> { @bignum / :symbol }.should raise_error(TypeError)
end
end
it "coerces the RHS and calls #coerce" do
obj = mock("integer plus")
obj.should_receive(:coerce).with(6).and_return([6, 3])
(6 / obj).should == 2
end
it "coerces the RHS and calls #coerce even if it's private" do
obj = Object.new
class << obj
private def coerce(n)
[n, 3]
end
end
(6 / obj).should == 2
end
end
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