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Unified Diff: tests/SkPEGTest.cpp

Issue 2271743002: Reland: Experimental parsing expression grammar (PEG) template library (Closed) Base URL: https://chromium.googlesource.com/skia.git@master
Patch Set: Fixes for MSan, g3 roll Created 4 years, 4 months ago
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Index: tests/SkPEGTest.cpp
diff --git a/tests/SkPEGTest.cpp b/tests/SkPEGTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6773c1b8ca0f458088cc08f7553cb0da5a8e5681
--- /dev/null
+++ b/tests/SkPEGTest.cpp
@@ -0,0 +1,304 @@
+/*
+ * 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 "Test.h"
+
+#if defined(SK_XML)
+#include "SkPEG.h"
+
+using namespace skpeg;
+
+namespace {
+
+struct Alpha {
+ using V = char;
+ using MatchT = MatchResult<V>;
+
+ static MatchT Match(const char* in) {
+ static constexpr unsigned kAlphaRange = 'z' - 'a';
+ return static_cast<unsigned>(*in - 'a') <= kAlphaRange
+ || static_cast<unsigned>(*in - 'A') <= kAlphaRange
+ ? MatchT(in + 1, *in)
+ : nullptr;
+ }
+};
+
+struct Digit {
+ using V = uint8_t;
+ using MatchT = MatchResult<V>;
+
+ static MatchT Match(const char* in) {
+ static constexpr unsigned kDigitRange = '9' - '0';
+ return static_cast<unsigned>(*in - '0') <= kDigitRange
+ ? MatchT(in + 1, SkTo<uint8_t>(*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<LIT<'f', 'o', 'o'>>::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<LIT<'X'>, EOS>::Match("X")));
+ REPORTER_ASSERT(r, !(Seq<LIT<'X'>, EOS>::Match("x")));
+ REPORTER_ASSERT(r, !(Seq<LIT<'X'>, EOS>::Match("xX")));
+ REPORTER_ASSERT(r, !(Seq<LIT<'X'>, EOS>::Match("XX")));
+ REPORTER_ASSERT(r, (Seq<LIT<'X'>, Seq<LIT<'X'>, EOS>>::Match("XX")));
+ REPORTER_ASSERT(r, (Seq<LIT<'X'>, Seq<LIT<'X'>, EOS>>::Match("XX")));
+
+ REPORTER_ASSERT(r, !(Seq<LIT<'F', 'o', 'o'>, EOS>::Match("FooBar")));
+ REPORTER_ASSERT(r, (Seq<LIT<'F', 'o', 'o'>, EOS>::Match("Foo")));
+
+ {
+ const auto m = Seq<LIT<'x'>, Digit>::Match("x5");
+ REPORTER_ASSERT(r, m);
+ REPORTER_ASSERT(r, m->get<1>() == 5);
+ }
+ {
+ const auto m = Seq<Digit, Digit>::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<Digit,Alpha>::Match("")));
+ REPORTER_ASSERT(r, !(Choice<Digit,Alpha>::Match("\t")));
+ REPORTER_ASSERT(r, !(Choice<Digit,Alpha>::Match(" ")));
+ REPORTER_ASSERT(r, (Choice<Digit,Alpha>::Match("a")));
+ REPORTER_ASSERT(r, (Choice<Digit,Alpha>::Match("3")));
+ REPORTER_ASSERT(r, (Choice<Digit,Alpha>::Match("a ")));
+ REPORTER_ASSERT(r, (Choice<Digit,Alpha>::Match("3 ")));
+ REPORTER_ASSERT(r, !(Choice<Digit,Alpha>::Match(" a ")));
+ REPORTER_ASSERT(r, !(Choice<Digit,Alpha>::Match(" 3 ")));
+
+ {
+ const auto m = Choice<Alpha, Digit>::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<Alpha, Digit>::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<LIT<'f', 'o', 'o'>>::Match(gTests[i].fInput);
+ REPORTER_ASSERT(r, matchAny);
+ REPORTER_ASSERT(r, matchAny->fValues.count() == gTests[i].fCount);
+
+ const auto matchSome = Some<LIT<'f', 'o', 'o'>>::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<Digit>::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<Digit>,
+ Opt<Seq<
+ LIT<','>,
+ Some<Digit>>>,
+ 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<LIT<' '>>,
+ Choice<LIT<'F'>, LIT<'f'>>,
+ LIT<'o', 'o'>,
+ Some<Seq<
+ Choice<LIT<'B'>, LIT<'b'>>,
+ LIT<'a', 'r'>>>,
+ Choice<LIT<'B'>, LIT<'b'>>,
+ LIT<'a', 'z'>,
+ Any<LIT<' '>>,
+ 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);
+}
+
+#endif // SK_XML
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