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diff --git a/absl/strings/internal/escaping_test_common.h b/absl/strings/internal/escaping_test_common.h
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+++ b/absl/strings/internal/escaping_test_common.h
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+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// This test contains common things needed by both escaping_test.cc and
+// escaping_benchmark.cc.
+
+#ifndef ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_
+#define ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_
+
+#include <array>
+#include "absl/strings/string_view.h"
+
+namespace absl {
+namespace strings_internal {
+
+struct base64_testcase {
+  absl::string_view plaintext;
+  absl::string_view cyphertext;
+};
+
+inline const std::array<base64_testcase, 5>& base64_strings() {
+  static const std::array<base64_testcase, 5> testcase{{
+      // Some google quotes
+      // Cyphertext created with "uuencode (GNU sharutils) 4.6.3"
+      // (Note that we're testing the websafe encoding, though, so if
+      // you add messages, be sure to run "tr -- '+/' '-_'" on the output)
+      { "I was always good at math and science, and I never realized "
+        "that was unusual or somehow undesirable. So one of the things "
+        "I care a lot about is helping to remove that stigma, "
+        "to show girls that you can be feminine, you can like the things "
+        "that girls like, but you can also be really good at technology. "
+        "You can be really good at building things."
+        " - Marissa Meyer, Newsweek, 2010-12-22" "\n",
+
+        "SSB3YXMgYWx3YXlzIGdvb2QgYXQgbWF0aCBhbmQgc2NpZW5jZSwgYW5kIEkg"
+        "bmV2ZXIgcmVhbGl6ZWQgdGhhdCB3YXMgdW51c3VhbCBvciBzb21laG93IHVu"
+        "ZGVzaXJhYmxlLiBTbyBvbmUgb2YgdGhlIHRoaW5ncyBJIGNhcmUgYSBsb3Qg"
+        "YWJvdXQgaXMgaGVscGluZyB0byByZW1vdmUgdGhhdCBzdGlnbWEsIHRvIHNo"
+        "b3cgZ2lybHMgdGhhdCB5b3UgY2FuIGJlIGZlbWluaW5lLCB5b3UgY2FuIGxp"
+        "a2UgdGhlIHRoaW5ncyB0aGF0IGdpcmxzIGxpa2UsIGJ1dCB5b3UgY2FuIGFs"
+        "c28gYmUgcmVhbGx5IGdvb2QgYXQgdGVjaG5vbG9neS4gWW91IGNhbiBiZSBy"
+        "ZWFsbHkgZ29vZCBhdCBidWlsZGluZyB0aGluZ3MuIC0gTWFyaXNzYSBNZXll"
+        "ciwgTmV3c3dlZWssIDIwMTAtMTItMjIK" },
+
+      { "Typical first year for a new cluster: "
+        "~0.5 overheating "
+        "~1 PDU failure "
+        "~1 rack-move "
+        "~1 network rewiring "
+        "~20 rack failures "
+        "~5 racks go wonky "
+        "~8 network maintenances "
+        "~12 router reloads "
+        "~3 router failures "
+        "~dozens of minor 30-second blips for dns "
+        "~1000 individual machine failures "
+        "~thousands of hard drive failures "
+        "slow disks, bad memory, misconfigured machines, flaky machines, etc."
+        " - Jeff Dean, The Joys of Real Hardware" "\n",
+
+        "VHlwaWNhbCBmaXJzdCB5ZWFyIGZvciBhIG5ldyBjbHVzdGVyOiB-MC41IG92"
+        "ZXJoZWF0aW5nIH4xIFBEVSBmYWlsdXJlIH4xIHJhY2stbW92ZSB-MSBuZXR3"
+        "b3JrIHJld2lyaW5nIH4yMCByYWNrIGZhaWx1cmVzIH41IHJhY2tzIGdvIHdv"
+        "bmt5IH44IG5ldHdvcmsgbWFpbnRlbmFuY2VzIH4xMiByb3V0ZXIgcmVsb2Fk"
+        "cyB-MyByb3V0ZXIgZmFpbHVyZXMgfmRvemVucyBvZiBtaW5vciAzMC1zZWNv"
+        "bmQgYmxpcHMgZm9yIGRucyB-MTAwMCBpbmRpdmlkdWFsIG1hY2hpbmUgZmFp"
+        "bHVyZXMgfnRob3VzYW5kcyBvZiBoYXJkIGRyaXZlIGZhaWx1cmVzIHNsb3cg"
+        "ZGlza3MsIGJhZCBtZW1vcnksIG1pc2NvbmZpZ3VyZWQgbWFjaGluZXMsIGZs"
+        "YWt5IG1hY2hpbmVzLCBldGMuIC0gSmVmZiBEZWFuLCBUaGUgSm95cyBvZiBS"
+        "ZWFsIEhhcmR3YXJlCg" },
+
+      { "I'm the head of the webspam team at Google.  "
+        "That means that if you type your name into Google and get porn back, "
+        "it's my fault. Unless you're a porn star, in which case porn is a "
+        "completely reasonable response."
+        " - Matt Cutts, Google Plus" "\n",
+
+        "SSdtIHRoZSBoZWFkIG9mIHRoZSB3ZWJzcGFtIHRlYW0gYXQgR29vZ2xlLiAg"
+        "VGhhdCBtZWFucyB0aGF0IGlmIHlvdSB0eXBlIHlvdXIgbmFtZSBpbnRvIEdv"
+        "b2dsZSBhbmQgZ2V0IHBvcm4gYmFjaywgaXQncyBteSBmYXVsdC4gVW5sZXNz"
+        "IHlvdSdyZSBhIHBvcm4gc3RhciwgaW4gd2hpY2ggY2FzZSBwb3JuIGlzIGEg"
+        "Y29tcGxldGVseSByZWFzb25hYmxlIHJlc3BvbnNlLiAtIE1hdHQgQ3V0dHMs"
+        "IEdvb2dsZSBQbHVzCg" },
+
+      { "It will still be a long time before machines approach human "
+        "intelligence. "
+        "But luckily, machines don't actually have to be intelligent; "
+        "they just have to fake it. Access to a wealth of information, "
+        "combined with a rudimentary decision-making capacity, "
+        "can often be almost as useful. Of course, the results are better yet "
+        "when coupled with intelligence. A reference librarian with access to "
+        "a good search engine is a formidable tool."
+        " - Craig Silverstein, Siemens Pictures of the Future, Spring 2004"
+        "\n",
+
+        "SXQgd2lsbCBzdGlsbCBiZSBhIGxvbmcgdGltZSBiZWZvcmUgbWFjaGluZXMg"
+        "YXBwcm9hY2ggaHVtYW4gaW50ZWxsaWdlbmNlLiBCdXQgbHVja2lseSwgbWFj"
+        "aGluZXMgZG9uJ3QgYWN0dWFsbHkgaGF2ZSB0byBiZSBpbnRlbGxpZ2VudDsg"
+        "dGhleSBqdXN0IGhhdmUgdG8gZmFrZSBpdC4gQWNjZXNzIHRvIGEgd2VhbHRo"
+        "IG9mIGluZm9ybWF0aW9uLCBjb21iaW5lZCB3aXRoIGEgcnVkaW1lbnRhcnkg"
+        "ZGVjaXNpb24tbWFraW5nIGNhcGFjaXR5LCBjYW4gb2Z0ZW4gYmUgYWxtb3N0"
+        "IGFzIHVzZWZ1bC4gT2YgY291cnNlLCB0aGUgcmVzdWx0cyBhcmUgYmV0dGVy"
+        "IHlldCB3aGVuIGNvdXBsZWQgd2l0aCBpbnRlbGxpZ2VuY2UuIEEgcmVmZXJl"
+        "bmNlIGxpYnJhcmlhbiB3aXRoIGFjY2VzcyB0byBhIGdvb2Qgc2VhcmNoIGVu"
+        "Z2luZSBpcyBhIGZvcm1pZGFibGUgdG9vbC4gLSBDcmFpZyBTaWx2ZXJzdGVp"
+        "biwgU2llbWVucyBQaWN0dXJlcyBvZiB0aGUgRnV0dXJlLCBTcHJpbmcgMjAw"
+        "NAo" },
+
+      // Degenerate edge case
+      { "",
+        "" },
+  }};
+
+  return testcase;
+}
+
+}  // namespace strings_internal
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_