FloatLex_test.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/tests/compiler_tests/FloatLex_test.cpp

//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// FloatLex_test.cpp:
// Tests for parsing floats in GLSL source.
//

#include <sstream>
#include <string>

#include "common/debug.h"
#include "common/mathutil.h"
#include "compiler/translator/util.h"
#include "gtest/gtest.h"

namespace
{

class StrtofClampParser
{
  public:
    static float Parse(std::string str)
    {
        float value;
        sh::strtof_clamp(str, &value);
        return value;
    }
};

class NumericLexFloatParser
{
  public:
    static float Parse(std::string str) { return sh::NumericLexFloat32OutOfRangeToInfinity(str); }
};

}  // anonymous namespace

template <typename T>
class FloatLexTest : public ::testing::Test
{
  public:
    FloatLexTest() {}

  protected:
    void SetUp() override {}

    void TearDown() override {}

    static bool ParsedMatches(std::string str, float expected)
    {
        return (T::Parse(str) == expected);
    }

    static bool IsInfinity(std::string str)
    {
        float f = T::Parse(str);
        return gl::isInf(f);
    }

    static std::string Zeros(size_t count) { return std::string(count, '0'); }
};

typedef ::testing::Types<StrtofClampParser, NumericLexFloatParser> FloatParserTypes;
TYPED_TEST_SUITE(FloatLexTest, FloatParserTypes);

TYPED_TEST(FloatLexTest, One)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("1.0", 1.0f));
}

TYPED_TEST(FloatLexTest, Ten)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("10.0", 10.0f));
}

TYPED_TEST(FloatLexTest, TenScientific)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("1.0e1", 10.0f));
}

TYPED_TEST(FloatLexTest, ScientificWithSmallMantissa)
{
    std::stringstream ss;
    ss << "0." << TestFixture::Zeros(100) << "125e102";
    ASSERT_TRUE(TestFixture::ParsedMatches(ss.str(), 12.5f));
}

TYPED_TEST(FloatLexTest, ScientificWithLargeMantissa)
{
    std::stringstream ss;
    ss << "9" << TestFixture::Zeros(100) << ".0e-100";
    ASSERT_TRUE(TestFixture::ParsedMatches(ss.str(), 9.0f));
}

TYPED_TEST(FloatLexTest, ScientificWithVerySmallMantissa)
{
    std::stringstream ss;
    ss << "0." << TestFixture::Zeros(5000) << "125e5002";
    ASSERT_TRUE(TestFixture::ParsedMatches(ss.str(), 12.5f));
}

TYPED_TEST(FloatLexTest, ScientificWithVeryLargeMantissa)
{
    std::stringstream ss;
    ss << "9" << TestFixture::Zeros(5000) << ".0e-5000";
    ASSERT_TRUE(TestFixture::ParsedMatches(ss.str(), 9.0f));
}

TYPED_TEST(FloatLexTest, StartWithDecimalDot)
{
    ASSERT_TRUE(TestFixture::ParsedMatches(".125", 0.125f));
}

TYPED_TEST(FloatLexTest, EndWithDecimalDot)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("123.", 123.0f));
}

TYPED_TEST(FloatLexTest, NoDecimalDot)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("125e-2", 1.25f));
}

TYPED_TEST(FloatLexTest, EndStartWithDecimalDotScientific)
{
    ASSERT_TRUE(TestFixture::ParsedMatches(".625e-1", 0.0625f));
}

TYPED_TEST(FloatLexTest, EndWithDecimalDotScientific)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("102400.e-2", 1024.0f));
}

TYPED_TEST(FloatLexTest, UppercaseE)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("125E-2", 1.25f));
}

TYPED_TEST(FloatLexTest, PlusInExponent)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("1E+2", 100.0f));
}

TYPED_TEST(FloatLexTest, SlightlyAboveMaxFloat)
{
    ASSERT_TRUE(TestFixture::IsInfinity("3.4029e38"));
}

TYPED_TEST(FloatLexTest, SlightlyBelowMaxFloat)
{
    ASSERT_FALSE(TestFixture::IsInfinity("3.4028e38"));
    ASSERT_TRUE(TestFixture::ParsedMatches("3.4028e38", 3.4028e38f));
}

TYPED_TEST(FloatLexTest, SlightlyAboveMaxFloatLargerMantissa)
{
    ASSERT_TRUE(TestFixture::IsInfinity("34.029e37"));
}

TYPED_TEST(FloatLexTest, SlightlyBelowMaxFloatLargerMantissa)
{
    ASSERT_FALSE(TestFixture::IsInfinity("34.028e37"));
    ASSERT_TRUE(TestFixture::ParsedMatches("34.028e37", 3.4028e38f));
}

TYPED_TEST(FloatLexTest, SlightlyAboveMaxFloatSmallerMantissa)
{
    ASSERT_TRUE(TestFixture::IsInfinity("0.34029e39"));
}

TYPED_TEST(FloatLexTest, SlightlyBelowMaxFloatSmallerMantissa)
{
    ASSERT_FALSE(TestFixture::IsInfinity("0.34028e39"));
    ASSERT_TRUE(TestFixture::ParsedMatches("0.34028e39", 3.4028e38f));
}

TYPED_TEST(FloatLexTest, SlightlyBelowMinSubnormalFloat)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("1.0e-48", 0.0f));
}

TYPED_TEST(FloatLexTest, SlightlyAboveMinNormalFloat)
{
    ASSERT_FALSE(TestFixture::ParsedMatches("1.0e-37", 0.0f));
}

TYPED_TEST(FloatLexTest, ManySignificantDigits)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("1.23456789", 1.23456789f));
}

TYPED_TEST(FloatLexTest, MantissaBitAboveMaxUint)
{
    ASSERT_TRUE(TestFixture::ParsedMatches("4294967299.", 4294967299.0f));
}

TYPED_TEST(FloatLexTest, ExponentBitAboveMaxInt)
{
    ASSERT_TRUE(TestFixture::IsInfinity("1.0e2147483649"));
}

TYPED_TEST(FloatLexTest, ExponentBitBelowMaxIntAndLargeMantissa)
{
    std::stringstream ss;
    ss << "1" << TestFixture::Zeros(32) << ".0e2147483640";
    ASSERT_TRUE(TestFixture::IsInfinity(ss.str()));
}

TYPED_TEST(FloatLexTest, ExponentBitAboveMinIntAndSmallMantissa)
{
    std::stringstream ss;
    ss << "0." << TestFixture::Zeros(32) << "1e-2147483640";
    ASSERT_TRUE(TestFixture::ParsedMatches(ss.str(), 0.0f));
}

kc3-lang/angle/src/tests/compiler_tests/FloatLex_test.cpp

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kc3-lang/angle /src/tests/compiler_tests/FloatLex_test.cpp