describe :float_modulo, :shared => true do
  it "returns self modulo other" do
    6543.21.send(@method, 137).should be_close(104.21, TOLERANCE)
    5667.19.send(@method, bignum_value).should be_close(5667.19, TOLERANCE)
    6543.21.send(@method, 137.24).should be_close(92.9299999999996, TOLERANCE)

    -1.0.send(@method, 1).should == 0
  end

  it "returns self when modulus is +Infinity" do
    4.2.send(@method, (1/0.0)).should == 4.2
  end

  it "returns -Infinity when modulus is -Infinity" do
    4.2.send(@method, (-1/0.0)).should == (-1/0.0)
  end

  it "returns NaN when called on NaN or Infinities" do
    (0/0.0).send(@method, 42).should be_nan
   (1/0.0).send(@method, 42).should be_nan
   (-1/0.0).send(@method, 42).should be_nan
  end

  it "returns NaN when modulus is NaN" do
    4.2.send(@method, (0/0.0)).should be_nan
  end

  it "returns -0.0 when called on -0.0 with a non zero modulus" do
    r = (-0.0).send(@method, 42)
    r.should == 0
    (1/r).should < 0

    r = (-0.0).send(@method, (1/0.0))
    r.should == 0
    (1/r).should < 0
  end

  ruby_version_is ""..."1.9" do
    it "does NOT raise ZeroDivisionError if other is zero" do
      1.0.send(@method, 0).should be_nan
      1.0.send(@method, 0.0).should be_nan
    end
  end

  ruby_version_is "1.9" do
    it "raises a ZeroDivisionError if other is zero" do
      lambda { 1.0.send(@method, 0) }.should raise_error(ZeroDivisionError)
      lambda { 1.0.send(@method, 0.0) }.should raise_error(ZeroDivisionError)
    end
  end
end
