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Update to ruby/spec@254c380

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This commit is contained in:
Benoit Daloze 2021-10-20 21:57:05 +02:00
parent 500ba24882
commit 030b1892d5
7 changed files with 146 additions and 50 deletions
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29
spec/ruby/core/array/sum_spec.rb
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@ -9,6 +9,35 @@ describe "Array#sum" do
[1, 2, 3].sum { |i| i * 10 }.should == 60
end
# https://bugs.ruby-lang.org/issues/12217
# https://github.com/ruby/ruby/blob/master/doc/ChangeLog-2.4.0#L6208-L6214
it "uses Kahan's compensated summation algorithm for precise sum of float numbers" do
floats = [2.7800000000000002, 5.0, 2.5, 4.44, 3.89, 3.89, 4.44, 7.78, 5.0, 2.7800000000000002, 5.0, 2.5]
naive_sum = floats.reduce { |sum, e| sum + e }
naive_sum.should == 50.00000000000001
floats.sum.should == 50.0
end
it "handles infinite values and NaN" do
[1.0, Float::INFINITY].sum.should == Float::INFINITY
[1.0, -Float::INFINITY].sum.should == -Float::INFINITY
[1.0, Float::NAN].sum.should.nan?
[Float::INFINITY, 1.0].sum.should == Float::INFINITY
[-Float::INFINITY, 1.0].sum.should == -Float::INFINITY
[Float::NAN, 1.0].sum.should.nan?
[Float::NAN, Float::INFINITY].sum.should.nan?
[Float::INFINITY, Float::NAN].sum.should.nan?
[Float::INFINITY, -Float::INFINITY].sum.should.nan?
[-Float::INFINITY, Float::INFINITY].sum.should.nan?
[Float::INFINITY, Float::INFINITY].sum.should == Float::INFINITY
[-Float::INFINITY, -Float::INFINITY].sum.should == -Float::INFINITY
[Float::NAN, Float::NAN].sum.should.nan?
end
it "returns init value if array is empty" do
[].sum(-1).should == -1
end