Include RE2 library

third_party/re2/re2/testing/exhaustive_test.cc

Index: third_party/re2/re2/testing/exhaustive_test.cc
diff --git a/third_party/re2/re2/testing/exhaustive_test.cc b/third_party/re2/re2/testing/exhaustive_test.cc
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+++ b/third_party/re2/re2/testing/exhaustive_test.cc
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+// 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 {
+
+DECLARE_string(regexp_engines);
+
+// Test very simple expressions.
+TEST(EgrepLiterals, Lowercase) {
+  EgrepTest(3, 2, "abc.", 3, "abc", "");
+}
+
+// Test mixed-case expressions.
+TEST(EgrepLiterals, MixedCase) {
+  EgrepTest(3, 2, "AaBb.", 2, "AaBb", "");
+}
+
+// Test mixed-case in case-insensitive mode.
+TEST(EgrepLiterals, FoldCase) {
+  // The punctuation characters surround A-Z and a-z
+  // in the ASCII table.  This looks for bugs in the
+  // bytemap range code in the DFA.
+  EgrepTest(3, 2, "abAB.", 2, "aBc@_~", "(?i:%s)");
+}
+
+// Test very simple expressions.
+TEST(EgrepLiterals, UTF8) {
+  EgrepTest(3, 2, "ab.", 4, "a\xE2\x98\xBA", "");
+}
+
+}  // namespace re2
+