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  1. Core Server
  2. SERVER-43764

Add more testing for special values in DoubleDoubleSummation

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    • Fully Compatible
    • v4.2, v4.0, v3.6

    Description

      TEST(Summation, ConvertSpecialToDecimal) {
          constexpr double infinity = std::numeric_limits<double>::infinity();
          DoubleDoubleSummation sum;
          
          sum.addDouble(infinity);    
          ASSERT_EQUALS(infinity, sum.getDouble()); // ok
          ASSERT_TRUE(sum.getDecimal().isInfinite()); // <-- fail here, it's nan
          ASSERT_FALSE(sum.getDecimal().isNaN()); // <!-- fail here, it is actually nan
          
          sum.addDouble(1); // now once we add something to sum, everything is ok
          ASSERT_EQUALS(infinity, sum.getDouble()); // ok, still infinity
          ASSERT_TRUE(sum.getDecimal().isInfinite()); // ok, now it's infinity
          ASSERT_FALSE(sum.getDecimal().isNaN()); // ok, not nan
      }
      

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              anton.korshunov@mongodb.com Anton Korshunov
              geert.bosch@mongodb.com Geert Bosch
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                Updated:
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