Method TestRoundTripFromInf

cpp/src/arrow/util/float16_test.cc:84–104

  }

  void TestRoundTripFromInf() {
    const T test_cases[] = {+Limits<T>::infinity(), -Limits<T>::infinity()};

    for (size_t i = 0; i < std::size(test_cases); ++i) {
      ARROW_SCOPED_TRACE("i=", i);
      const auto input = test_cases[i];

      ASSERT_TRUE(std::isinf(input));
      const bool sign = std::signbit(input);

      const auto f16 = Float16(input);
      EXPECT_TRUE(f16.is_infinity());
      EXPECT_EQ(std::isfinite(input), f16.is_finite());
      EXPECT_EQ(std::isnan(input), f16.is_nan());
      EXPECT_EQ(sign, f16.signbit());

      const auto output = static_cast<T>(f16);
      EXPECT_TRUE(std::isinf(output));
      EXPECT_EQ(sign, std::signbit(output));
    }
  }

  void TestRoundTrip();
  void TestRoundTripFromNaN();