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diff --git a/Firestore/third_party/abseil-cpp/absl/strings/str_replace_test.cc b/Firestore/third_party/abseil-cpp/absl/strings/str_replace_test.cc
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+++ b/Firestore/third_party/abseil-cpp/absl/strings/str_replace_test.cc
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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.
+
+#include "absl/strings/str_replace.h"
+
+#include <list>
+#include <map>
+#include <tuple>
+
+#include "gtest/gtest.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_split.h"
+
+TEST(StrReplaceAll, OneReplacement) {
+  std::string s;
+
+  // Empty std::string.
+  s = absl::StrReplaceAll(s, {{"", ""}});
+  EXPECT_EQ(s, "");
+  s = absl::StrReplaceAll(s, {{"x", ""}});
+  EXPECT_EQ(s, "");
+  s = absl::StrReplaceAll(s, {{"", "y"}});
+  EXPECT_EQ(s, "");
+  s = absl::StrReplaceAll(s, {{"x", "y"}});
+  EXPECT_EQ(s, "");
+
+  // Empty substring.
+  s = absl::StrReplaceAll("abc", {{"", ""}});
+  EXPECT_EQ(s, "abc");
+  s = absl::StrReplaceAll("abc", {{"", "y"}});
+  EXPECT_EQ(s, "abc");
+  s = absl::StrReplaceAll("abc", {{"x", ""}});
+  EXPECT_EQ(s, "abc");
+
+  // Substring not found.
+  s = absl::StrReplaceAll("abc", {{"xyz", "123"}});
+  EXPECT_EQ(s, "abc");
+
+  // Replace entire std::string.
+  s = absl::StrReplaceAll("abc", {{"abc", "xyz"}});
+  EXPECT_EQ(s, "xyz");
+
+  // Replace once at the start.
+  s = absl::StrReplaceAll("abc", {{"a", "x"}});
+  EXPECT_EQ(s, "xbc");
+
+  // Replace once in the middle.
+  s = absl::StrReplaceAll("abc", {{"b", "x"}});
+  EXPECT_EQ(s, "axc");
+
+  // Replace once at the end.
+  s = absl::StrReplaceAll("abc", {{"c", "x"}});
+  EXPECT_EQ(s, "abx");
+
+  // Replace multiple times with varying lengths of original/replacement.
+  s = absl::StrReplaceAll("ababa", {{"a", "xxx"}});
+  EXPECT_EQ(s, "xxxbxxxbxxx");
+
+  s = absl::StrReplaceAll("ababa", {{"b", "xxx"}});
+  EXPECT_EQ(s, "axxxaxxxa");
+
+  s = absl::StrReplaceAll("aaabaaabaaa", {{"aaa", "x"}});
+  EXPECT_EQ(s, "xbxbx");
+
+  s = absl::StrReplaceAll("abbbabbba", {{"bbb", "x"}});
+  EXPECT_EQ(s, "axaxa");
+
+  // Overlapping matches are replaced greedily.
+  s = absl::StrReplaceAll("aaa", {{"aa", "x"}});
+  EXPECT_EQ(s, "xa");
+
+  // The replacements are not recursive.
+  s = absl::StrReplaceAll("aaa", {{"aa", "a"}});
+  EXPECT_EQ(s, "aa");
+}
+
+TEST(StrReplaceAll, ManyReplacements) {
+  std::string s;
+
+  // Empty std::string.
+  s = absl::StrReplaceAll("", {{"", ""}, {"x", ""}, {"", "y"}, {"x", "y"}});
+  EXPECT_EQ(s, "");
+
+  // Empty substring.
+  s = absl::StrReplaceAll("abc", {{"", ""}, {"", "y"}, {"x", ""}});
+  EXPECT_EQ(s, "abc");
+
+  // Replace entire std::string, one char at a time
+  s = absl::StrReplaceAll("abc", {{"a", "x"}, {"b", "y"}, {"c", "z"}});
+  EXPECT_EQ(s, "xyz");
+  s = absl::StrReplaceAll("zxy", {{"z", "x"}, {"x", "y"}, {"y", "z"}});
+  EXPECT_EQ(s, "xyz");
+
+  // Replace once at the start (longer matches take precedence)
+  s = absl::StrReplaceAll("abc", {{"a", "x"}, {"ab", "xy"}, {"abc", "xyz"}});
+  EXPECT_EQ(s, "xyz");
+
+  // Replace once in the middle.
+  s = absl::StrReplaceAll(
+      "Abc!", {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc", "yz"}, {"c", "z"}});
+  EXPECT_EQ(s, "Ayz!");
+
+  // Replace once at the end.
+  s = absl::StrReplaceAll(
+      "Abc!",
+      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc!", "yz?"}, {"c!", "z;"}});
+  EXPECT_EQ(s, "Ayz?");
+
+  // Replace multiple times with varying lengths of original/replacement.
+  s = absl::StrReplaceAll("ababa", {{"a", "xxx"}, {"b", "XXXX"}});
+  EXPECT_EQ(s, "xxxXXXXxxxXXXXxxx");
+
+  // Overlapping matches are replaced greedily.
+  s = absl::StrReplaceAll("aaa", {{"aa", "x"}, {"a", "X"}});
+  EXPECT_EQ(s, "xX");
+  s = absl::StrReplaceAll("aaa", {{"a", "X"}, {"aa", "x"}});
+  EXPECT_EQ(s, "xX");
+
+  // Two well-known sentences
+  s = absl::StrReplaceAll("the quick brown fox jumped over the lazy dogs",
+                          {
+                              {"brown", "box"},
+                              {"dogs", "jugs"},
+                              {"fox", "with"},
+                              {"jumped", "five"},
+                              {"over", "dozen"},
+                              {"quick", "my"},
+                              {"the", "pack"},
+                              {"the lazy", "liquor"},
+                          });
+  EXPECT_EQ(s, "pack my box with five dozen liquor jugs");
+}
+
+TEST(StrReplaceAll, ManyReplacementsInMap) {
+  std::map<const char *, const char *> replacements;
+  replacements["$who"] = "Bob";
+  replacements["$count"] = "5";
+  replacements["#Noun"] = "Apples";
+  std::string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
+                                 replacements);
+  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
+}
+
+TEST(StrReplaceAll, ReplacementsInPlace) {
+  std::string s = std::string("$who bought $count #Noun. Thanks $who!");
+  int count;
+  count = absl::StrReplaceAll({{"$count", absl::StrCat(5)},
+                              {"$who", "Bob"},
+                              {"#Noun", "Apples"}}, &s);
+  EXPECT_EQ(count, 4);
+  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
+}
+
+TEST(StrReplaceAll, ReplacementsInPlaceInMap) {
+  std::string s = std::string("$who bought $count #Noun. Thanks $who!");
+  std::map<absl::string_view, absl::string_view> replacements;
+  replacements["$who"] = "Bob";
+  replacements["$count"] = "5";
+  replacements["#Noun"] = "Apples";
+  int count;
+  count = absl::StrReplaceAll(replacements, &s);
+  EXPECT_EQ(count, 4);
+  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
+}
+
+struct Cont {
+  Cont() {}
+  explicit Cont(absl::string_view src) : data(src) {}
+
+  absl::string_view data;
+};
+
+template <int index>
+absl::string_view get(const Cont& c) {
+  auto splitter = absl::StrSplit(c.data, ':');
+  auto it = splitter.begin();
+  for (int i = 0; i < index; ++i) ++it;
+
+  return *it;
+}
+
+TEST(StrReplaceAll, VariableNumber) {
+  std::string s;
+  {
+    std::vector<std::pair<std::string, std::string>> replacements;
+
+    s = "abc";
+    EXPECT_EQ(0, absl::StrReplaceAll(replacements, &s));
+    EXPECT_EQ("abc", s);
+
+    s = "abc";
+    replacements.push_back({"a", "A"});
+    EXPECT_EQ(1, absl::StrReplaceAll(replacements, &s));
+    EXPECT_EQ("Abc", s);
+
+    s = "abc";
+    replacements.push_back({"b", "B"});
+    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
+    EXPECT_EQ("ABc", s);
+
+    s = "abc";
+    replacements.push_back({"d", "D"});
+    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
+    EXPECT_EQ("ABc", s);
+
+    EXPECT_EQ("ABcABc", absl::StrReplaceAll("abcabc", replacements));
+  }
+
+  {
+    std::map<const char*, const char*> replacements;
+    replacements["aa"] = "x";
+    replacements["a"] = "X";
+    s = "aaa";
+    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
+    EXPECT_EQ("xX", s);
+
+    EXPECT_EQ("xxX", absl::StrReplaceAll("aaaaa", replacements));
+  }
+
+  {
+    std::list<std::pair<absl::string_view, absl::string_view>> replacements = {
+        {"a", "x"}, {"b", "y"}, {"c", "z"}};
+
+    std::string s = absl::StrReplaceAll("abc", replacements);
+    EXPECT_EQ(s, "xyz");
+  }
+
+  {
+    using X = std::tuple<absl::string_view, std::string, int>;
+    std::vector<X> replacements(3);
+    replacements[0] = X{"a", "x", 1};
+    replacements[1] = X{"b", "y", 0};
+    replacements[2] = X{"c", "z", -1};
+
+    std::string s = absl::StrReplaceAll("abc", replacements);
+    EXPECT_EQ(s, "xyz");
+  }
+
+  {
+    std::vector<Cont> replacements(3);
+    replacements[0] = Cont{"a:x"};
+    replacements[1] = Cont{"b:y"};
+    replacements[2] = Cont{"c:z"};
+
+    std::string s = absl::StrReplaceAll("abc", replacements);
+    EXPECT_EQ(s, "xyz");
+  }
+}
+
+// Same as above, but using the in-place variant of absl::StrReplaceAll,
+// that returns the # of replacements performed.
+TEST(StrReplaceAll, Inplace) {
+  std::string s;
+  int reps;
+
+  // Empty std::string.
+  s = "";
+  reps = absl::StrReplaceAll({{"", ""}, {"x", ""}, {"", "y"}, {"x", "y"}}, &s);
+  EXPECT_EQ(reps, 0);
+  EXPECT_EQ(s, "");
+
+  // Empty substring.
+  s = "abc";
+  reps = absl::StrReplaceAll({{"", ""}, {"", "y"}, {"x", ""}}, &s);
+  EXPECT_EQ(reps, 0);
+  EXPECT_EQ(s, "abc");
+
+  // Replace entire std::string, one char at a time
+  s = "abc";
+  reps = absl::StrReplaceAll({{"a", "x"}, {"b", "y"}, {"c", "z"}}, &s);
+  EXPECT_EQ(reps, 3);
+  EXPECT_EQ(s, "xyz");
+  s = "zxy";
+  reps = absl::StrReplaceAll({{"z", "x"}, {"x", "y"}, {"y", "z"}}, &s);
+  EXPECT_EQ(reps, 3);
+  EXPECT_EQ(s, "xyz");
+
+  // Replace once at the start (longer matches take precedence)
+  s = "abc";
+  reps = absl::StrReplaceAll({{"a", "x"}, {"ab", "xy"}, {"abc", "xyz"}}, &s);
+  EXPECT_EQ(reps, 1);
+  EXPECT_EQ(s, "xyz");
+
+  // Replace once in the middle.
+  s = "Abc!";
+  reps = absl::StrReplaceAll(
+      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc", "yz"}, {"c", "z"}}, &s);
+  EXPECT_EQ(reps, 1);
+  EXPECT_EQ(s, "Ayz!");
+
+  // Replace once at the end.
+  s = "Abc!";
+  reps = absl::StrReplaceAll(
+      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc!", "yz?"}, {"c!", "z;"}}, &s);
+  EXPECT_EQ(reps, 1);
+  EXPECT_EQ(s, "Ayz?");
+
+  // Replace multiple times with varying lengths of original/replacement.
+  s = "ababa";
+  reps = absl::StrReplaceAll({{"a", "xxx"}, {"b", "XXXX"}}, &s);
+  EXPECT_EQ(reps, 5);
+  EXPECT_EQ(s, "xxxXXXXxxxXXXXxxx");
+
+  // Overlapping matches are replaced greedily.
+  s = "aaa";
+  reps = absl::StrReplaceAll({{"aa", "x"}, {"a", "X"}}, &s);
+  EXPECT_EQ(reps, 2);
+  EXPECT_EQ(s, "xX");
+  s = "aaa";
+  reps = absl::StrReplaceAll({{"a", "X"}, {"aa", "x"}}, &s);
+  EXPECT_EQ(reps, 2);
+  EXPECT_EQ(s, "xX");
+
+  // Two well-known sentences
+  s = "the quick brown fox jumped over the lazy dogs";
+  reps = absl::StrReplaceAll(
+      {
+          {"brown", "box"},
+          {"dogs", "jugs"},
+          {"fox", "with"},
+          {"jumped", "five"},
+          {"over", "dozen"},
+          {"quick", "my"},
+          {"the", "pack"},
+          {"the lazy", "liquor"},
+      },
+      &s);
+  EXPECT_EQ(reps, 8);
+  EXPECT_EQ(s, "pack my box with five dozen liquor jugs");
+}