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-rw-r--r--spec/ruby/core/integer/shared/exponent.rb141
1 files changed, 90 insertions, 51 deletions
diff --git a/spec/ruby/core/integer/shared/exponent.rb b/spec/ruby/core/integer/shared/exponent.rb
index f949c514c8..0be13859f9 100644
--- a/spec/ruby/core/integer/shared/exponent.rb
+++ b/spec/ruby/core/integer/shared/exponent.rb
@@ -1,60 +1,78 @@
describe :integer_exponent, shared: true do
context "fixnum" do
it "returns self raised to the given power" do
- 2.send(@method, 0).should eql 1
- 2.send(@method, 1).should eql 2
- 2.send(@method, 2).should eql 4
+ 2.send(@method, 0).should.eql? 1
+ 2.send(@method, 1).should.eql? 2
+ 2.send(@method, 2).should.eql? 4
- 9.send(@method, 0.5).should eql 3.0
- 9.send(@method, Rational(1, 2)).should eql 3.0
+ 9.send(@method, 0.5).should.eql? 3.0
+ 9.send(@method, Rational(1, 2)).should.eql? 3.0
5.send(@method, -1).to_f.to_s.should == '0.2'
- 2.send(@method, 40).should eql 1099511627776
+ 2.send(@method, 40).should.eql? 1099511627776
end
it "overflows the answer to a bignum transparently" do
- 2.send(@method, 29).should eql 536870912
- 2.send(@method, 30).should eql 1073741824
- 2.send(@method, 31).should eql 2147483648
- 2.send(@method, 32).should eql 4294967296
+ 2.send(@method, 29).should.eql? 536870912
+ 2.send(@method, 30).should.eql? 1073741824
+ 2.send(@method, 31).should.eql? 2147483648
+ 2.send(@method, 32).should.eql? 4294967296
- 2.send(@method, 61).should eql 2305843009213693952
- 2.send(@method, 62).should eql 4611686018427387904
- 2.send(@method, 63).should eql 9223372036854775808
- 2.send(@method, 64).should eql 18446744073709551616
- 8.send(@method, 23).should eql 590295810358705651712
+ 2.send(@method, 61).should.eql? 2305843009213693952
+ 2.send(@method, 62).should.eql? 4611686018427387904
+ 2.send(@method, 63).should.eql? 9223372036854775808
+ 2.send(@method, 64).should.eql? 18446744073709551616
+ 8.send(@method, 23).should.eql? 590295810358705651712
end
it "raises negative numbers to the given power" do
- (-2).send(@method, 29).should eql(-536870912)
- (-2).send(@method, 30).should eql(1073741824)
- (-2).send(@method, 31).should eql(-2147483648)
- (-2).send(@method, 32).should eql(4294967296)
+ (-2).send(@method, 29).should.eql?(-536870912)
+ (-2).send(@method, 30).should.eql?(1073741824)
+ (-2).send(@method, 31).should.eql?(-2147483648)
+ (-2).send(@method, 32).should.eql?(4294967296)
+ (-2).send(@method, 33).should.eql?(-8589934592)
- (-2).send(@method, 61).should eql(-2305843009213693952)
- (-2).send(@method, 62).should eql(4611686018427387904)
- (-2).send(@method, 63).should eql(-9223372036854775808)
- (-2).send(@method, 64).should eql(18446744073709551616)
+ (-2).send(@method, 61).should.eql?(-2305843009213693952)
+ (-2).send(@method, 62).should.eql?(4611686018427387904)
+ (-2).send(@method, 63).should.eql?(-9223372036854775808)
+ (-2).send(@method, 64).should.eql?(18446744073709551616)
+ (-2).send(@method, 65).should.eql?(-36893488147419103232)
end
it "can raise 1 to a bignum safely" do
- 1.send(@method, 4611686018427387904).should eql 1
+ 1.send(@method, 4611686018427387904).should.eql? 1
end
it "can raise -1 to a bignum safely" do
- (-1).send(@method, 4611686018427387904).should eql(1)
- (-1).send(@method, 4611686018427387905).should eql(-1)
+ (-1).send(@method, 4611686018427387904).should.eql?(1)
+ (-1).send(@method, 4611686018427387905).should.eql?(-1)
end
- it "returns Float::INFINITY when the number is too big" do
- -> {
- 2.send(@method, 427387904).should == Float::INFINITY
- }.should complain(/warning: in a\*\*b, b may be too big/)
+ ruby_version_is ""..."3.4" do
+ it "returns Float::INFINITY when the number is too big" do
+ -> {
+ 2.send(@method, 427387904).should == Float::INFINITY
+ }.should complain(/warning: in a\*\*b, b may be too big/)
+ end
+ end
+
+ ruby_version_is "3.4" do
+ it "returns an Integer for results larger than the old 32MB limit" do
+ # 2 ** 40000000 requires 40000001 bits
+ # This exceeds the old 32MB limit but is within the new 16GB limit
+ result = 2.send(@method, 40000000)
+ result.should.is_a?(Integer)
+ result.bit_length.should == 40000001
+ end
+
+ it "raises an ArgumentError when the result size exceeds the limit" do
+ -> { 100000000.send(@method, 1000000000) }.should.raise(ArgumentError)
+ end
end
it "raises a ZeroDivisionError for 0 ** -1" do
- -> { 0.send(@method, -1) }.should raise_error(ZeroDivisionError)
- -> { 0.send(@method, Rational(-1, 1)) }.should raise_error(ZeroDivisionError)
+ -> { 0.send(@method, -1) }.should.raise(ZeroDivisionError)
+ -> { 0.send(@method, Rational(-1, 1)) }.should.raise(ZeroDivisionError)
end
it "returns Float::INFINITY for 0 ** -1.0" do
@@ -62,9 +80,9 @@ describe :integer_exponent, shared: true do
end
it "raises a TypeError when given a non-numeric power" do
- -> { 13.send(@method, "10") }.should raise_error(TypeError)
- -> { 13.send(@method, :symbol) }.should raise_error(TypeError)
- -> { 13.send(@method, nil) }.should raise_error(TypeError)
+ -> { 13.send(@method, "10") }.should.raise(TypeError)
+ -> { 13.send(@method, :symbol) }.should.raise(TypeError)
+ -> { 13.send(@method, nil) }.should.raise(TypeError)
end
it "coerces power and calls #**" do
@@ -96,28 +114,49 @@ describe :integer_exponent, shared: true do
end
it "returns self raised to other power" do
- (@bignum.send(@method, 4)).should == 7237005577332262361485077344629993318496048279512298547155833600056910050625
- (@bignum.send(@method, 1.2)).should be_close(57262152889751597425762.57804, TOLERANCE)
+ (@bignum.send(@method, 4)).should == 115792089237316196603666111261383895964500887398800252671052694326794607293761
+ (@bignum.send(@method, 1.3)).should be_close(11109528802438156839288832.0, TOLERANCE)
end
it "raises a TypeError when given a non-Integer" do
- -> { @bignum.send(@method, mock('10')) }.should raise_error(TypeError)
- -> { @bignum.send(@method, "10") }.should raise_error(TypeError)
- -> { @bignum.send(@method, :symbol) }.should raise_error(TypeError)
- end
-
- it "switch to a Float when the values is too big" do
- flt = nil
- -> {
- flt = @bignum.send(@method, @bignum)
- }.should complain(/warning: in a\*\*b, b may be too big/)
- flt.should be_kind_of(Float)
- flt.infinite?.should == 1
+ -> { @bignum.send(@method, mock('10')) }.should.raise(TypeError)
+ -> { @bignum.send(@method, "10") }.should.raise(TypeError)
+ -> { @bignum.send(@method, :symbol) }.should.raise(TypeError)
+ end
+
+ ruby_version_is ""..."3.4" do
+ it "switch to a Float when the values is too big" do
+ flt = nil
+ -> {
+ flt = @bignum.send(@method, @bignum)
+ }.should complain(/warning: in a\*\*b, b may be too big/)
+ flt.should.is_a?(Float)
+ flt.infinite?.should == 1
+ end
+ end
+
+ ruby_version_is "3.4" do
+ it "returns an Integer for large Bignum results exceeding the old limit" do
+ # (2 ** 70) ** 500000 requires 35000001 bits
+ # This exceeds the old 32MB limit but is within the new 16GB limit
+ bignum_base = 2 ** 70
+ result = bignum_base.send(@method, 500000)
+ result.should.is_a?(Integer)
+ result.bit_length.should == 35000001
+ end
+
+ it "raises an ArgumentError when Bignum result exceeds the limit" do
+ # @bignum ** @bignum would require enormous memory
+ -> {
+ @bignum.send(@method, @bignum)
+ }.should.raise(ArgumentError)
+ end
end
it "returns a complex number when negative and raised to a fractional power" do
- ((-@bignum).send(@method, (1.0/3))) .should be_close(Complex(1048576,1816186.907597341), TOLERANCE)
- ((-@bignum).send(@method, Rational(1,3))).should be_close(Complex(1048576,1816186.907597341), TOLERANCE)
+ (-bignum_value).send(@method, (1.0/2)).should be_close(Complex(0.0, 4294967296.0), TOLERANCE)
+ (-@bignum).send(@method, (1.0/3)) .should be_close(Complex(1321122.9748145656, 2288252.1154253655), TOLERANCE)
+ (-@bignum).send(@method, Rational(1,3)).should be_close(Complex(1321122.9748145656, 2288252.1154253655), TOLERANCE)
end
end
end
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