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require_relative '../../spec_helper'
describe "Integer#fdiv" do
it "performs floating-point division between self and a fixnum" do
8.fdiv(7).should be_close(1.14285714285714, TOLERANCE)
end
it "performs floating-point division between self and a bignum" do
8.fdiv(bignum_value).should be_close(8.673617379884035e-19, TOLERANCE)
end
it "performs floating-point division between self bignum and a bignum" do
num = 1000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146010000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146010000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146009
den = 2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
num.fdiv(den).should == 500.0
end
it "rounds to the correct value for bignums" do
den = 9 * 10**342
num = 1 * 10**344
num.fdiv(den).should == 11.11111111111111
num = 1 * 10**343
num.fdiv(den).should == 1.1111111111111112
num = 1 * 10**342
num.fdiv(den).should == 0.1111111111111111
num = 2 * 10**342
num.fdiv(den).should == 0.2222222222222222
num = 3 * 10**342
num.fdiv(den).should == 0.3333333333333333
num = 4 * 10**342
num.fdiv(den).should == 0.4444444444444444
num = 5 * 10**342
num.fdiv(den).should == 0.5555555555555556
num = 6 * 10**342
num.fdiv(den).should == 0.6666666666666666
num = 7 * 10**342
num.fdiv(den).should == 0.7777777777777778
num = 8 * 10**342
num.fdiv(den).should == 0.8888888888888888
num = 9 * 10**342
num.fdiv(den).should == 1.0
num = -5 * 10**342
num.fdiv(den).should == -0.5555555555555556
end
it "rounds to the correct float for bignum denominators" do
1.fdiv(10**324).should == 0.0
1.fdiv(10**323).should == 1.0e-323
end
it "performs floating-point division between self and a Float" do
8.fdiv(9.0).should be_close(0.888888888888889, TOLERANCE)
end
it "returns NaN when the argument is NaN" do
-1.fdiv(nan_value).nan?.should be_true
1.fdiv(nan_value).nan?.should be_true
end
it "returns Infinity when the argument is 0" do
1.fdiv(0).infinite?.should == 1
end
it "returns -Infinity when the argument is 0 and self is negative" do
-1.fdiv(0).infinite?.should == -1
end
it "returns Infinity when the argument is 0.0" do
1.fdiv(0.0).infinite?.should == 1
end
it "returns -Infinity when the argument is 0.0 and self is negative" do
-1.fdiv(0.0).infinite?.should == -1
end
it "raises a TypeError when argument isn't numeric" do
-> { 1.fdiv(mock('non-numeric')) }.should raise_error(TypeError)
end
it "raises an ArgumentError when passed multiple arguments" do
-> { 1.fdiv(6,0.2) }.should raise_error(ArgumentError)
end
it "follows the coercion protocol" do
(obj = mock('10')).should_receive(:coerce).with(1).and_return([1, 10])
1.fdiv(obj).should == 0.1
end
end
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