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69 lines
3.3 KiB
C++
69 lines
3.3 KiB
C++
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#include <gtest/gtest.h>
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#include <Core/AccurateComparison.h>
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using namespace DB;
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GTEST_TEST(AccurateComparison, Tests)
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{
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/// Arbitrary assortion of cases.
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ASSERT_TRUE(accurate::equalsOp(static_cast<Float32>(123), static_cast<UInt64>(123)));
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ASSERT_TRUE(accurate::lessOp(static_cast<Float32>(123), static_cast<UInt64>(124)));
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ASSERT_TRUE(accurate::lessOp(static_cast<Float32>(-1), static_cast<UInt64>(1)));
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ASSERT_TRUE(accurate::lessOp(static_cast<Int64>(-1), static_cast<UInt64>(1)));
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ASSERT_TRUE(!accurate::equalsOp(static_cast<Int64>(-1), static_cast<UInt64>(-1)));
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ASSERT_TRUE(accurate::equalsOp(-0., 0));
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ASSERT_TRUE(accurate::lessOp(-0., 1));
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ASSERT_TRUE(accurate::lessOp(-0.5, 1));
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ASSERT_TRUE(accurate::lessOp(0.5, 1));
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ASSERT_TRUE(accurate::equalsOp(1.0, 1));
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ASSERT_TRUE(accurate::greaterOp(1.1, 1));
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ASSERT_TRUE(accurate::greaterOp(11.1, 1));
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ASSERT_TRUE(accurate::greaterOp(11.1, 11));
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ASSERT_TRUE(accurate::lessOp(-11.1, 11));
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ASSERT_TRUE(accurate::lessOp(-11.1, -11));
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ASSERT_TRUE(accurate::lessOp(-1.1, -1));
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ASSERT_TRUE(accurate::greaterOp(-1.1, -2));
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ASSERT_TRUE(accurate::greaterOp(1000., 100));
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ASSERT_TRUE(accurate::greaterOp(-100., -1000));
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ASSERT_TRUE(accurate::lessOp(100., 1000));
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ASSERT_TRUE(accurate::lessOp(-1000., -100));
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ASSERT_TRUE(accurate::lessOp(-std::numeric_limits<Float64>::infinity(), 0));
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ASSERT_TRUE(accurate::lessOp(-std::numeric_limits<Float64>::infinity(), 1000));
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ASSERT_TRUE(accurate::lessOp(-std::numeric_limits<Float64>::infinity(), -1000));
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ASSERT_TRUE(accurate::greaterOp(std::numeric_limits<Float64>::infinity(), 0));
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ASSERT_TRUE(accurate::greaterOp(std::numeric_limits<Float64>::infinity(), 1000));
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ASSERT_TRUE(accurate::greaterOp(std::numeric_limits<Float64>::infinity(), -1000));
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ASSERT_TRUE(accurate::lessOp(1, 1e100));
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ASSERT_TRUE(accurate::lessOp(-1, 1e100));
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ASSERT_TRUE(accurate::lessOp(-1e100, 1));
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ASSERT_TRUE(accurate::lessOp(-1e100, -1));
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/// Tricky cases with floats.
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ASSERT_TRUE(accurate::equalsOp(static_cast<UInt64>(9223372036854775808ULL), static_cast<Float64>(9223372036854775808ULL)));
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ASSERT_TRUE(accurate::equalsOp(static_cast<UInt64>(9223372036854775808ULL), static_cast<Float32>(9223372036854775808ULL)));
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ASSERT_TRUE(accurate::greaterOp(static_cast<UInt64>(9223372036854776000ULL), static_cast<Float64>(9223372036854776000ULL)));
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ASSERT_TRUE(accurate::lessOp(static_cast<UInt64>(9223372000000000000ULL), static_cast<Float32>(9223372000000000000ULL)));
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ASSERT_TRUE(accurate::equalsOp(static_cast<Float32>(9223372036854775808ULL), static_cast<Float64>(9223372036854775808ULL)));
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/* Float32 f = static_cast<Float32>(9223372000000000000ULL);
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UInt64 u = static_cast<UInt64>(9223372000000000000ULL);
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DecomposedFloat32 components(f);
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std::cerr << std::fixed << std::setprecision(3) << f
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<< ", " << components.normalized_exponent()
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<< ", " << components.mantissa()
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<< ", " << (components.mantissa() << (components.normalized_exponent() - 23))
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<< ", " << (1ULL << components.normalized_exponent())
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<< ", " << (components.normalized_exponent() >= static_cast<int16_t>(8 * sizeof(UInt64) - is_signed_v<UInt64>))
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<< ": " << components.compare(u)
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<< "\n";*/
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}
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