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require_relative '../../spec_helper'
describe "Integer#^" do
context "fixnum" do
it "returns self bitwise EXCLUSIVE OR other" do
(3 ^ 5).should == 6
(-2 ^ -255).should == 255
(5 ^ bignum_value + 0xffff_ffff).should == 0x1_0000_0000_ffff_fffa
end
it "returns self bitwise XOR other when one operand is negative" do
((1 << 33) ^ -1).should == -8589934593
(-1 ^ (1 << 33)).should == -8589934593
((-(1<<33)-1) ^ 5).should == -8589934598
(5 ^ (-(1<<33)-1)).should == -8589934598
end
it "returns self bitwise XOR other when both operands are negative" do
(-5 ^ -1).should == 4
(-3 ^ -4).should == 1
(-12 ^ -13).should == 7
(-13 ^ -12).should == 7
end
it "returns self bitwise EXCLUSIVE OR a bignum" do
(-1 ^ 2**64).should == -18446744073709551617
end
it "coerces the rhs and calls #coerce" do
obj = mock("fixnum bit xor")
obj.should_receive(:coerce).with(6).and_return([6, 3])
(6 ^ obj).should == 5
end
it "raises a TypeError when passed a Float" do
-> { (3 ^ 3.4) }.should raise_error(TypeError)
end
it "raises a TypeError and does not call #to_int when defined on an object" do
obj = mock("integer bit xor")
obj.should_not_receive(:to_int)
-> { 3 ^ obj }.should raise_error(TypeError)
end
end
context "bignum" do
before :each do
@bignum = bignum_value(18)
end
it "returns self bitwise EXCLUSIVE OR other" do
(@bignum ^ 2).should == 18446744073709551632
(@bignum ^ @bignum).should == 0
(@bignum ^ 14).should == 18446744073709551644
end
it "returns self bitwise EXCLUSIVE OR other when one operand is negative" do
(@bignum ^ -0x40000000000000000).should == -55340232221128654830
(@bignum ^ -@bignum).should == -4
(@bignum ^ -0x8000000000000000).should == -27670116110564327406
end
it "returns self bitwise EXCLUSIVE OR other when both operands are negative" do
(-@bignum ^ -0x40000000000000000).should == 55340232221128654830
(-@bignum ^ -@bignum).should == 0
(-@bignum ^ -0x4000000000000000).should == 23058430092136939502
end
it "returns self bitwise EXCLUSIVE OR other when all bits are 1 and other value is negative" do
(9903520314283042199192993791 ^ -1).should == -9903520314283042199192993792
(784637716923335095479473677900958302012794430558004314111 ^ -1).should ==
-784637716923335095479473677900958302012794430558004314112
end
it "raises a TypeError when passed a Float" do
not_supported_on :opal do
-> {
bignum_value ^ bignum_value(0xffff).to_f
}.should raise_error(TypeError)
end
-> { @bignum ^ 14.5 }.should raise_error(TypeError)
end
it "raises a TypeError and does not call #to_int when defined on an object" do
obj = mock("bignum bit xor")
obj.should_not_receive(:to_int)
-> { @bignum ^ obj }.should raise_error(TypeError)
end
end
end
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