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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, Float::INFINITY).should == 4.2
end
it "returns -Infinity when modulus is -Infinity" do
4.2.send(@method, -Float::INFINITY).should == -Float::INFINITY
end
it "returns NaN when called on NaN or Infinities" do
Float::NAN.send(@method, 42).should be_nan
Float::INFINITY.send(@method, 42).should be_nan
(-Float::INFINITY).send(@method, 42).should be_nan
end
it "returns NaN when modulus is NaN" do
4.2.send(@method, Float::NAN).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, Float::INFINITY)
r.should == 0
(1/r).should < 0
end
it "tries to coerce the modulus" do
obj = mock("modulus")
obj.should_receive(:coerce).with(1.25).and_return([1.25, 0.5])
(1.25 % obj).should == 0.25
end
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
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