Include RE2 library

third_party/re2/re2/testing/exhaustive1_test.cc

Index: third_party/re2/re2/testing/exhaustive1_test.cc
diff --git a/third_party/re2/re2/testing/exhaustive1_test.cc b/third_party/re2/re2/testing/exhaustive1_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9e057cc56ecaae66f2a7d7d6fbdd2788f81ae69e
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+++ b/third_party/re2/re2/testing/exhaustive1_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"
+
+DECLARE_string(regexp_engines);
+
+namespace re2 {
+
+// Test simple repetition operators
+TEST(Repetition, Simple) {
+  vector<string> ops = Split(" ",
+    "%s{0} %s{0,} %s{1} %s{1,} %s{0,1} %s{0,2} "
+    "%s{1,2} %s{2} %s{2,} %s{3,4} %s{4,5} "
+    "%s* %s+ %s? %s*? %s+? %s??");
+  ExhaustiveTest(3, 2, Explode("abc."), ops,
+                 6, Explode("ab"), "(?:%s)", "");
+  ExhaustiveTest(3, 2, Explode("abc."), ops,
+                 40, Explode("a"), "(?:%s)", "");
+}
+
+// Test capturing parens -- (a) -- inside repetition operators
+TEST(Repetition, Capturing) {
+  vector<string> ops = Split(" ",
+    "%s{0} %s{0,} %s{1} %s{1,} %s{0,1} %s{0,2} "
+    "%s{1,2} %s{2} %s{2,} %s{3,4} %s{4,5} "
+    "%s* %s+ %s? %s*? %s+? %s??");
+  ExhaustiveTest(3, 2, Split(" ", "a (a) b"), ops,
+                 7, Explode("ab"), "(?:%s)", "");
+
+  // This would be a great test, but it runs forever when PCRE is enabled.
+  if (strstr("PCRE", FLAGS_regexp_engines.c_str()) == NULL)
+    ExhaustiveTest(4, 3, Split(" ", "a (a)"), ops,
+                   100, Explode("a"), "(?:%s)", "");
+}
+
+}  // namespace re2
+