Method TestSmallValues

cpp/src/arrow/util/decimal_test.cc:166–191

  }

  void TestSmallValues() {
    struct TestValue {
      std::string s;
      int64_t expected;
      int32_t expected_precision;
      int32_t expected_scale;
    };
    for (const auto& tv : std::vector<TestValue>{{"12.3", 123LL, 3, 1},
                                                 {"0.00123", 123LL, 5, 5},
                                                 {"1.23E-8", 123LL, 3, 10},
                                                 {"-1.23E-8", -123LL, 3, 10},
                                                 {"1.23E+3", 1230LL, 4, 0},
                                                 {"-1.23E+3", -1230LL, 4, 0},
                                                 {"1.23E+5", 123000LL, 6, 0},
                                                 {"1.2345E+7", 12345000LL, 8, 0},
                                                 {"1.23e-8", 123LL, 3, 10},
                                                 {"-1.23e-8", -123LL, 3, 10},
                                                 {"1.23e+3", 1230LL, 4, 0},
                                                 {"-1.23e+3", -1230LL, 4, 0},
                                                 {"1.23e+5", 123000LL, 6, 0},
                                                 {"1.2345e+7", 12345000LL, 8, 0}}) {
      ARROW_SCOPED_TRACE("s = '", tv.s, "'");
      AssertDecimalFromString(tv.s, DecimalType(tv.expected), tv.expected_precision,
                              tv.expected_scale);
    }
  }

  void CheckRandomValuesRoundTrip(int32_t precision, int32_t scale) {
    auto rnd = random::RandomArrayGenerator(42);