From 9d08cbc8c6131ff61a1e71cc5c8cf27841d62b42 Mon Sep 17 00:00:00 2001 From: fmalita Date: Wed, 24 Aug 2016 18:23:24 -0700 Subject: Experimental parsing expression grammar (PEG) template library BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2271743002 Review-Url: https://codereview.chromium.org/2271743002 --- tests/SkPEGTest.cpp | 300 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 300 insertions(+) create mode 100644 tests/SkPEGTest.cpp (limited to 'tests/SkPEGTest.cpp') diff --git a/tests/SkPEGTest.cpp b/tests/SkPEGTest.cpp new file mode 100644 index 0000000000..68a47776e8 --- /dev/null +++ b/tests/SkPEGTest.cpp @@ -0,0 +1,300 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkPEG.h" +#include "Test.h" + +using namespace skpeg; + +namespace { + +struct Alpha { + using V = char; + using MatchT = MatchResult; + + static MatchT Match(const char* in) { + static constexpr unsigned kAlphaRange = 'z' - 'a'; + return static_cast(*in - 'a') <= kAlphaRange + || static_cast(*in - 'A') <= kAlphaRange + ? MatchT(in + 1, *in) + : nullptr; + } +}; + +struct Digit { + using V = uint8_t; + using MatchT = MatchResult; + + static MatchT Match(const char* in) { + static constexpr unsigned kDigitRange = '9' - '0'; + return static_cast(*in - '0') <= kDigitRange + ? MatchT(in + 1, SkTo(*in - '0')) + : nullptr; + } +}; + +void test_EOS(skiatest::Reporter* r) { + static const struct { + const char* fInput; + bool fMatch; + } gTests[] = { + { "" , true }, + { " " , false }, + { "\0" , true }, + { "foo", false }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto match = EOS::Match(gTests[i].fInput); + REPORTER_ASSERT(r, match == gTests[i].fMatch); + REPORTER_ASSERT(r, match.fNext == (match ? gTests[i].fInput : nullptr)); + } +} + +void test_LIT(skiatest::Reporter* r) { + static const struct { + const char* fInput; + bool fMatch; + } gTests[] = { + { "" , false }, + { " " , false }, + { "x" , false }, + { "X" , true }, + { "xX", false }, + { "Xx", true }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto match = LIT<'X'>::Match(gTests[i].fInput); + REPORTER_ASSERT(r, match == gTests[i].fMatch); + REPORTER_ASSERT(r, match.fNext == (match ? gTests[i].fInput + 1 : nullptr)); + } + + REPORTER_ASSERT(r, !(LIT<'F', 'o', 'o'>::Match(""))); + REPORTER_ASSERT(r, !(LIT<'F', 'o', 'o'>::Match("Fo"))); + REPORTER_ASSERT(r, !(LIT<'F', 'o', 'o'>::Match("FoO"))); + REPORTER_ASSERT(r, (LIT<'F', 'o', 'o'>::Match("Foo"))); + REPORTER_ASSERT(r, (LIT<'F', 'o', 'o'>::Match("Foobar"))); +} + +void test_Alpha(skiatest::Reporter* r) { + static const struct { + const char* fInput; + bool fMatch; + char fMatchValue; + } gTests[] = { + { "" , false, 0 }, + { "\r", false, 0 }, + { "\n", false, 0 }, + { "\t", false, 0 }, + { "0" , false, 0 }, + { "9" , false, 0 }, + { "a" , true , 'a' }, + { "a" , true , 'a' }, + { "z" , true , 'z' }, + { "A" , true , 'A' }, + { "Z" , true , 'Z' }, + { "az", true , 'a' }, + { "a0", true , 'a' }, + { "0a", false, 0 }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto match = Alpha::Match(gTests[i].fInput); + REPORTER_ASSERT(r, match == gTests[i].fMatch); + REPORTER_ASSERT(r, match.fNext == (match ? gTests[i].fInput + 1 : nullptr)); + if (match) { + REPORTER_ASSERT(r, *match == gTests[i].fMatchValue); + } + } +} + +void test_Digit(skiatest::Reporter* r) { + static const struct { + const char* fInput; + bool fMatch; + uint8_t fMatchValue; + } gTests[] = { + { "" , false, 0 }, + { "/" , false, 0 }, + { ":" , false, 0 }, + { "x" , false, 0 }, + { "x0" , false, 0 }, + { "0" , true , 0 }, + { "1x" , true , 1 }, + { "9 a", true , 9 }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto match = Digit::Match(gTests[i].fInput); + REPORTER_ASSERT(r, match == gTests[i].fMatch); + REPORTER_ASSERT(r, match.fNext == (match ? gTests[i].fInput + 1 : nullptr)); + if (match) { + REPORTER_ASSERT(r, *match == gTests[i].fMatchValue); + } + } +} + +void test_Opt(skiatest::Reporter* r) { + static const struct { + const char* fInput; + bool fMatch; + } gTests[] = { + { "" , false }, + { "fo" , false }, + { " foo" , false }, + { "foo" , true }, + { "foobar" , true }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto m = Opt>::Match(gTests[i].fInput); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, m->fValue.isValid() == gTests[i].fMatch); + } +} + +void test_Seq(skiatest::Reporter* r) { + REPORTER_ASSERT(r, (Seq, EOS>::Match("X"))); + REPORTER_ASSERT(r, !(Seq, EOS>::Match("x"))); + REPORTER_ASSERT(r, !(Seq, EOS>::Match("xX"))); + REPORTER_ASSERT(r, !(Seq, EOS>::Match("XX"))); + REPORTER_ASSERT(r, (Seq, Seq, EOS>>::Match("XX"))); + REPORTER_ASSERT(r, (Seq, Seq, EOS>>::Match("XX"))); + + REPORTER_ASSERT(r, !(Seq, EOS>::Match("FooBar"))); + REPORTER_ASSERT(r, (Seq, EOS>::Match("Foo"))); + + { + const auto m = Seq, Digit>::Match("x5"); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, m->get<1>() == 5); + } + { + const auto m = Seq::Match("42"); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, m->get<0>() == 4); + REPORTER_ASSERT(r, m->get<1>() == 2); + } +} + +void test_Choice(skiatest::Reporter* r) { + REPORTER_ASSERT(r, !(Choice::Match(""))); + REPORTER_ASSERT(r, !(Choice::Match("\t"))); + REPORTER_ASSERT(r, !(Choice::Match(" "))); + REPORTER_ASSERT(r, (Choice::Match("a"))); + REPORTER_ASSERT(r, (Choice::Match("3"))); + REPORTER_ASSERT(r, (Choice::Match("a "))); + REPORTER_ASSERT(r, (Choice::Match("3 "))); + REPORTER_ASSERT(r, !(Choice::Match(" a "))); + REPORTER_ASSERT(r, !(Choice::Match(" 3 "))); + + { + const auto m = Choice::Match("x"); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, m->v1.isValid()); + REPORTER_ASSERT(r, !m->v2.isValid()); + REPORTER_ASSERT(r, *m->v1.get() == 'x'); + } + + { + const auto m = Choice::Match("7"); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, !m->v1.isValid()); + REPORTER_ASSERT(r, m->v2.isValid()); + REPORTER_ASSERT(r, *m->v2.get() == 7); + } +} + +void test_AnySome(skiatest::Reporter* r) { + static const struct { + const char* fInput; + int fCount; + } gTests[] = { + { "" , 0 }, + { "fo" , 0 }, + { "Foo" , 0 }, + { "foo" , 1 }, + { "foofoo", 2 }, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) { + const auto matchAny = Any>::Match(gTests[i].fInput); + REPORTER_ASSERT(r, matchAny); + REPORTER_ASSERT(r, matchAny->fValues.count() == gTests[i].fCount); + + const auto matchSome = Some>::Match(gTests[i].fInput); + REPORTER_ASSERT(r, matchSome == (gTests[i].fCount > 0)); + REPORTER_ASSERT(r, !matchSome || + matchSome->get<1>().fValues.count() == gTests[i].fCount - 1); + } + + { + const auto m = Any::Match("0123456789foo"); + REPORTER_ASSERT(r, m); + REPORTER_ASSERT(r, m->fValues.count() == 10); + for (int i = 0; i < m->fValues.count(); ++i) { + REPORTER_ASSERT(r, m->fValues[i] == i); + } + } +} + +void test_Complex(skiatest::Reporter* r) { + // [0-9]+(,[0-9]+)?$ + using P0 = + Seq< + Some, + Opt, + Some>>, + EOS>; + + REPORTER_ASSERT(r, !P0::Match("")); + REPORTER_ASSERT(r, !P0::Match(",")); + REPORTER_ASSERT(r, !P0::Match("1,")); + REPORTER_ASSERT(r, !P0::Match(",1")); + REPORTER_ASSERT(r, P0::Match("1")); + REPORTER_ASSERT(r, P0::Match("1,2")); + REPORTER_ASSERT(r, !P0::Match("1,2 ")); + REPORTER_ASSERT(r, P0::Match("123,456")); + + // [ ]*[Ff]oo([Bb]ar)+[Bb]az[ ]*$ + using P1 = + Seq< + Any>, + Choice, LIT<'f'>>, + LIT<'o', 'o'>, + Some, LIT<'b'>>, + LIT<'a', 'r'>>>, + Choice, LIT<'b'>>, + LIT<'a', 'z'>, + Any>, + EOS>; + + REPORTER_ASSERT(r, !P1::Match("")); + REPORTER_ASSERT(r, !P1::Match("FooBar")); + REPORTER_ASSERT(r, !P1::Match("FooBaz")); + REPORTER_ASSERT(r, P1::Match("FooBarBaz")); + REPORTER_ASSERT(r, P1::Match("foobarbaz")); + REPORTER_ASSERT(r, P1::Match(" FooBarbaz ")); + REPORTER_ASSERT(r, P1::Match(" FooBarbarbarBaz ")); +} + +} // anonymous ns + +DEF_TEST(SkPEG, r) { + test_EOS(r); + test_LIT(r); + test_Alpha(r); + test_Digit(r); + test_Opt(r); + test_Seq(r); + test_Choice(r); + test_AnySome(r); + test_Complex(r); +} -- cgit v1.2.3