require File.expand_path('../../../spec_helper', __FILE__)

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 == 0x8000_0000_ffff_fffa
    end

    it "returns self bitwise EXCLUSIVE OR a bignum" do
      (-1 ^ 2**64).should == -18446744073709551617
    end

    it "raises a TypeError when passed a Float" do
      lambda { (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)

      lambda { 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 == 9223372036854775824
      (@bignum ^ @bignum).should == 0
      (@bignum ^ 14).should == 9223372036854775836
    end

    it "returns self bitwise EXCLUSIVE OR other when one operand is negative" do
      (@bignum ^ -0x40000000000000000).should == -64563604257983430638
      (@bignum ^ -@bignum).should == -4
      (@bignum ^ -0x8000000000000000).should == -18446744073709551598
    end

    it "returns self bitwise EXCLUSIVE OR other when both operands are negative" do
      (-@bignum ^ -0x40000000000000000).should == 64563604257983430638
      (-@bignum ^ -@bignum).should == 0
      (-@bignum ^ -0x4000000000000000).should == 13835058055282163694
    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
        lambda {
          bignum_value ^ bignum_value(0xffff).to_f
        }.should raise_error(TypeError)
      end
      lambda { @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)

      lambda { @bignum ^ obj }.should raise_error(TypeError)
    end
  end
end
