Replace RE2 import with a dependency

third_party/re2/re2/testing/exhaustive3_test.cc

-// Copyright 2008 The RE2 Authors.  All Rights Reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Exhaustive testing of regular expression matching.
-
-#include "util/test.h"
-#include "re2/testing/exhaustive_tester.h"
-
-namespace re2 {
-
-// Test simple character classes by themselves.
-TEST(CharacterClasses, Exhaustive) {
-  vector<string> atoms = Split(" ",
-    "[a] [b] [ab] [^bc] [b-d] [^b-d] []a] [-a] [a-] [^-a] [a-b-c] a b .");
-  ExhaustiveTest(2, 1, atoms, RegexpGenerator::EgrepOps(),
-                 5, Explode("ab"), "", "");
-}
-
-// Test simple character classes inside a___b (for example, a[a]b).
-TEST(CharacterClasses, ExhaustiveAB) {
-  vector<string> atoms = Split(" ",
-    "[a] [b] [ab] [^bc] [b-d] [^b-d] []a] [-a] [a-] [^-a] [a-b-c] a b .");
-  ExhaustiveTest(2, 1, atoms, RegexpGenerator::EgrepOps(),
-                 5, Explode("ab"), "a%sb", "");
-}
-
-// Returns UTF8 for Rune r
-static string UTF8(Rune r) {
-  char buf[UTFmax+1];
-  buf[runetochar(buf, &r)] = 0;
-  return string(buf);
-}
-
-// Returns a vector of "interesting" UTF8 characters.
-// Unicode is now too big to just return all of them,
-// so UTF8Characters return a set likely to be good test cases.
-static const vector<string>& InterestingUTF8() {
-  static bool init;
-  static vector<string> v;
-
-  if (init)
-    return v;
-
-  init = true;
-  // All the Latin1 equivalents are interesting.
-  for (int i = 1; i < 256; i++)
-    v.push_back(UTF8(i));
-
-  // After that, the codes near bit boundaries are
-  // interesting, because they span byte sequence lengths.
-  for (int j = 0; j < 8; j++)
-    v.push_back(UTF8(256 + j));
-  for (int i = 512; i < Runemax; i <<= 1)
-    for (int j = -8; j < 8; j++)
-      v.push_back(UTF8(i + j));
-
-  // The codes near Runemax, including Runemax itself, are interesting.
-  for (int j = -8; j <= 0; j++)
-    v.push_back(UTF8(Runemax + j));
-
-  return v;
-}
-
-// Test interesting UTF-8 characters against character classes.
-TEST(InterestingUTF8, SingleOps) {
-  vector<string> atoms = Split(" ",
-    ". ^ $ \\a \\f \\n \\r \\t \\v \\d \\D \\s \\S \\w \\W \\b \\B "
-    "[[:alnum:]] [[:alpha:]] [[:blank:]] [[:cntrl:]] [[:digit:]] "
-    "[[:graph:]] [[:lower:]] [[:print:]] [[:punct:]] [[:space:]] "
-    "[[:upper:]] [[:xdigit:]] [\\s\\S] [\\d\\D] [^\\w\\W] [^\\d\\D]");
-  vector<string> ops;  // no ops
-  ExhaustiveTest(1, 0, atoms, ops,
-                 1, InterestingUTF8(), "", "");
-}
-
-// Test interesting UTF-8 characters against character classes,
-// but wrap everything inside AB.
-TEST(InterestingUTF8, AB) {
-  vector<string> atoms = Split(" ",
-    ". ^ $ \\a \\f \\n \\r \\t \\v \\d \\D \\s \\S \\w \\W \\b \\B "
-    "[[:alnum:]] [[:alpha:]] [[:blank:]] [[:cntrl:]] [[:digit:]] "
-    "[[:graph:]] [[:lower:]] [[:print:]] [[:punct:]] [[:space:]] "
-    "[[:upper:]] [[:xdigit:]] [\\s\\S] [\\d\\D] [^\\w\\W] [^\\d\\D]");
-  vector<string> ops;  // no ops
-  vector<string> alpha = InterestingUTF8();
-  for (size_t i = 0; i < alpha.size(); i++)
-    alpha[i] = "a" + alpha[i] + "b";
-  ExhaustiveTest(1, 0, atoms, ops,
-                 1, alpha, "a%sb", "");
-}
-
-}  // namespace re2
-