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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, (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
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