Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1423 insertions, 0 deletions

diff --git a/xpcom/tests/gtest/TestTArray2.cpp b/xpcom/tests/gtest/TestTArray2.cpp
new file mode 100644
index 0000000000..bc64ef1e05
--- /dev/null
+++ b/xpcom/tests/gtest/TestTArray2.cpp
@@ -0,0 +1,1423 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Unused.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <iostream>
+#include "nsTArray.h"
+#include "nsString.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsXPCOM.h"
+#include "nsIFile.h"
+
+#include "gtest/gtest.h"
+#include "mozilla/gtest/MozAssertions.h"
+
+using namespace mozilla;
+
+namespace TestTArray {
+
+// Define this so we can use test_basic_array in test_comptr_array
+template <class T>
+inline bool operator<(const nsCOMPtr<T>& lhs, const nsCOMPtr<T>& rhs) {
+  return lhs.get() < rhs.get();
+}
+
+//----
+
+template <class ElementType>
+static bool test_basic_array(ElementType* data, size_t dataLen,
+                             const ElementType& extra) {
+  CopyableTArray<ElementType> ary;
+  const nsTArray<ElementType>& cary = ary;
+
+  ary.AppendElements(data, dataLen);
+  if (ary.Length() != dataLen) {
+    return false;
+  }
+  if (!(ary == ary)) {
+    return false;
+  }
+  size_t i;
+  for (i = 0; i < ary.Length(); ++i) {
+    if (ary[i] != data[i]) return false;
+  }
+  for (i = 0; i < ary.Length(); ++i) {
+    if (ary.SafeElementAt(i, extra) != data[i]) return false;
+  }
+  if (ary.SafeElementAt(ary.Length(), extra) != extra ||
+      ary.SafeElementAt(ary.Length() * 10, extra) != extra)
+    return false;
+  // ensure sort results in ascending order
+  ary.Sort();
+  size_t j = 0, k = ary.IndexOfFirstElementGt(extra);
+  if (k != 0 && ary[k - 1] == extra) return false;
+  for (i = 0; i < ary.Length(); ++i) {
+    k = ary.IndexOfFirstElementGt(ary[i]);
+    if (k == 0 || ary[k - 1] != ary[i]) return false;
+    if (k < j) return false;
+    j = k;
+  }
+  for (i = ary.Length(); --i;) {
+    if (ary[i] < ary[i - 1]) return false;
+    if (ary[i] == ary[i - 1]) ary.RemoveElementAt(i);
+  }
+  if (!(ary == ary)) {
+    return false;
+  }
+  for (i = 0; i < ary.Length(); ++i) {
+    if (ary.BinaryIndexOf(ary[i]) != i) return false;
+  }
+  if (ary.BinaryIndexOf(extra) != ary.NoIndex) return false;
+  size_t oldLen = ary.Length();
+  ary.RemoveElement(data[dataLen / 2]);
+  if (ary.Length() != (oldLen - 1)) return false;
+  if (!(ary == ary)) return false;
+
+  if (ary.ApplyIf(
+          extra, []() { return true; }, []() { return false; }))
+    return false;
+  if (ary.ApplyIf(
+          extra, [](size_t) { return true; }, []() { return false; }))
+    return false;
+  // On a non-const array, ApplyIf's first lambda may use either const or non-
+  // const element types.
+  if (ary.ApplyIf(
+          extra, [](ElementType&) { return true; }, []() { return false; }))
+    return false;
+  if (ary.ApplyIf(
+          extra, [](const ElementType&) { return true; },
+          []() { return false; }))
+    return false;
+  if (ary.ApplyIf(
+          extra, [](size_t, ElementType&) { return true; },
+          []() { return false; }))
+    return false;
+  if (ary.ApplyIf(
+          extra, [](size_t, const ElementType&) { return true; },
+          []() { return false; }))
+    return false;
+
+  if (cary.ApplyIf(
+          extra, []() { return true; }, []() { return false; }))
+    if (cary.ApplyIf(
+            extra, [](size_t) { return true; }, []() { return false; }))
+      // On a const array, ApplyIf's first lambda must only use const element
+      // types.
+      if (cary.ApplyIf(
+              extra, [](const ElementType&) { return true; },
+              []() { return false; }))
+        if (cary.ApplyIf(
+                extra, [](size_t, const ElementType&) { return true; },
+                []() { return false; }))
+          return false;
+
+  size_t index = ary.Length() / 2;
+  ary.InsertElementAt(index, extra);
+  if (!(ary == ary)) return false;
+  if (ary[index] != extra) return false;
+  if (ary.IndexOf(extra) == ary.NoIndex) return false;
+  if (ary.LastIndexOf(extra) == ary.NoIndex) return false;
+  // ensure proper searching
+  if (ary.IndexOf(extra) > ary.LastIndexOf(extra)) return false;
+  if (ary.IndexOf(extra, index) != ary.LastIndexOf(extra, index)) return false;
+  if (!ary.ApplyIf(
+          extra,
+          [&](size_t i, const ElementType& e) {
+            return i == index && e == extra;
+          },
+          []() { return false; }))
+    return false;
+  if (!cary.ApplyIf(
+          extra,
+          [&](size_t i, const ElementType& e) {
+            return i == index && e == extra;
+          },
+          []() { return false; }))
+    return false;
+
+  nsTArray<ElementType> copy(ary.Clone());
+  if (!(ary == copy)) return false;
+  for (i = 0; i < copy.Length(); ++i) {
+    if (ary[i] != copy[i]) return false;
+  }
+  ary.AppendElements(copy);
+  size_t cap = ary.Capacity();
+  ary.RemoveElementsAt(copy.Length(), copy.Length());
+  ary.Compact();
+  if (ary.Capacity() == cap) return false;
+
+  ary.Clear();
+  if (ary.IndexOf(extra) != ary.NoIndex) return false;
+  if (ary.LastIndexOf(extra) != ary.NoIndex) return false;
+  if (ary.ApplyIf(
+          extra, []() { return true; }, []() { return false; }))
+    return false;
+  if (cary.ApplyIf(
+          extra, []() { return true; }, []() { return false; }))
+    return false;
+
+  ary.Clear();
+  if (!ary.IsEmpty()) return false;
+  if (!(ary == nsTArray<ElementType>())) return false;
+  if (ary == copy) return false;
+  if (ary.SafeElementAt(0, extra) != extra ||
+      ary.SafeElementAt(10, extra) != extra)
+    return false;
+
+  ary = copy;
+  if (!(ary == copy)) return false;
+  for (i = 0; i < copy.Length(); ++i) {
+    if (ary[i] != copy[i]) return false;
+  }
+
+  ary.InsertElementsAt(0, copy);
+  if (ary == copy) return false;
+  ary.RemoveElementsAt(0, copy.Length());
+  for (i = 0; i < copy.Length(); ++i) {
+    if (ary[i] != copy[i]) return false;
+  }
+
+  // These shouldn't crash!
+  nsTArray<ElementType> empty;
+  ary.AppendElements(reinterpret_cast<ElementType*>(0), 0);
+  ary.AppendElements(empty);
+
+  // See bug 324981
+  ary.RemoveElement(extra);
+  ary.RemoveElement(extra);
+
+  return true;
+}
+
+TEST(TArray, test_int_array)
+{
+  int data[] = {4, 6, 8, 2, 4, 1, 5, 7, 3};
+  ASSERT_TRUE(test_basic_array(data, ArrayLength(data), int(14)));
+}
+
+TEST(TArray, test_int64_array)
+{
+  int64_t data[] = {4, 6, 8, 2, 4, 1, 5, 7, 3};
+  ASSERT_TRUE(test_basic_array(data, ArrayLength(data), int64_t(14)));
+}
+
+TEST(TArray, test_char_array)
+{
+  char data[] = {4, 6, 8, 2, 4, 1, 5, 7, 3};
+  ASSERT_TRUE(test_basic_array(data, ArrayLength(data), char(14)));
+}
+
+TEST(TArray, test_uint32_array)
+{
+  uint32_t data[] = {4, 6, 8, 2, 4, 1, 5, 7, 3};
+  ASSERT_TRUE(test_basic_array(data, ArrayLength(data), uint32_t(14)));
+}
+
+//----
+
+class Object {
+ public:
+  Object() : mNum(0) {}
+  Object(const char* str, uint32_t num) : mStr(str), mNum(num) {}
+  Object(const Object& other) = default;
+  ~Object() = default;
+
+  Object& operator=(const Object& other) = default;
+
+  bool operator==(const Object& other) const {
+    return mStr == other.mStr && mNum == other.mNum;
+  }
+
+  bool operator<(const Object& other) const {
+    // sort based on mStr only
+    return Compare(mStr, other.mStr) < 0;
+  }
+
+  const char* Str() const { return mStr.get(); }
+  uint32_t Num() const { return mNum; }
+
+ private:
+  nsCString mStr;
+  uint32_t mNum;
+};
+
+TEST(TArray, test_object_array)
+{
+  nsTArray<Object> objArray;
+  const char kdata[] = "hello world";
+  size_t i;
+  for (i = 0; i < ArrayLength(kdata); ++i) {
+    char x[] = {kdata[i], '\0'};
+    objArray.AppendElement(Object(x, i));
+  }
+  for (i = 0; i < ArrayLength(kdata); ++i) {
+    ASSERT_EQ(objArray[i].Str()[0], kdata[i]);
+    ASSERT_EQ(objArray[i].Num(), i);
+  }
+  objArray.Sort();
+  const char ksorted[] = "\0 dehllloorw";
+  for (i = 0; i < ArrayLength(kdata) - 1; ++i) {
+    ASSERT_EQ(objArray[i].Str()[0], ksorted[i]);
+  }
+}
+
+class Countable {
+  static int sCount;
+
+ public:
+  Countable() { sCount++; }
+
+  Countable(const Countable& aOther) { sCount++; }
+
+  static int Count() { return sCount; }
+};
+
+class Moveable {
+  static int sCount;
+
+ public:
+  Moveable() { sCount++; }
+
+  Moveable(const Moveable& aOther) { sCount++; }
+
+  Moveable(Moveable&& aOther) {
+    // Do not increment sCount
+  }
+
+  static int Count() { return sCount; }
+};
+
+class MoveOnly_RelocateUsingMemutils {
+ public:
+  MoveOnly_RelocateUsingMemutils() = default;
+
+  MoveOnly_RelocateUsingMemutils(const MoveOnly_RelocateUsingMemutils&) =
+      delete;
+  MoveOnly_RelocateUsingMemutils(MoveOnly_RelocateUsingMemutils&&) = default;
+
+  MoveOnly_RelocateUsingMemutils& operator=(
+      const MoveOnly_RelocateUsingMemutils&) = delete;
+  MoveOnly_RelocateUsingMemutils& operator=(MoveOnly_RelocateUsingMemutils&&) =
+      default;
+};
+
+static_assert(
+    std::is_move_constructible_v<nsTArray<MoveOnly_RelocateUsingMemutils>>);
+static_assert(
+    std::is_move_assignable_v<nsTArray<MoveOnly_RelocateUsingMemutils>>);
+static_assert(
+    !std::is_copy_constructible_v<nsTArray<MoveOnly_RelocateUsingMemutils>>);
+static_assert(
+    !std::is_copy_assignable_v<nsTArray<MoveOnly_RelocateUsingMemutils>>);
+
+class MoveOnly_RelocateUsingMoveConstructor {
+ public:
+  MoveOnly_RelocateUsingMoveConstructor() = default;
+
+  MoveOnly_RelocateUsingMoveConstructor(
+      const MoveOnly_RelocateUsingMoveConstructor&) = delete;
+  MoveOnly_RelocateUsingMoveConstructor(
+      MoveOnly_RelocateUsingMoveConstructor&&) = default;
+
+  MoveOnly_RelocateUsingMoveConstructor& operator=(
+      const MoveOnly_RelocateUsingMoveConstructor&) = delete;
+  MoveOnly_RelocateUsingMoveConstructor& operator=(
+      MoveOnly_RelocateUsingMoveConstructor&&) = default;
+};
+}  // namespace TestTArray
+
+MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR(
+    TestTArray::MoveOnly_RelocateUsingMoveConstructor)
+
+namespace TestTArray {
+static_assert(std::is_move_constructible_v<
+              nsTArray<MoveOnly_RelocateUsingMoveConstructor>>);
+static_assert(
+    std::is_move_assignable_v<nsTArray<MoveOnly_RelocateUsingMoveConstructor>>);
+static_assert(!std::is_copy_constructible_v<
+              nsTArray<MoveOnly_RelocateUsingMoveConstructor>>);
+static_assert(!std::is_copy_assignable_v<
+              nsTArray<MoveOnly_RelocateUsingMoveConstructor>>);
+}  // namespace TestTArray
+
+namespace TestTArray {
+
+/* static */
+int Countable::sCount = 0;
+/* static */
+int Moveable::sCount = 0;
+
+static nsTArray<int> returns_by_value() {
+  nsTArray<int> result;
+  return result;
+}
+
+TEST(TArray, test_return_by_value)
+{
+  nsTArray<int> result = returns_by_value();
+  ASSERT_TRUE(true);  // This is just a compilation test.
+}
+
+TEST(TArray, test_move_array)
+{
+  nsTArray<Countable> countableArray;
+  uint32_t i;
+  for (i = 0; i < 4; ++i) {
+    countableArray.AppendElement(Countable());
+  }
+
+  ASSERT_EQ(Countable::Count(), 8);
+
+  const nsTArray<Countable>& constRefCountableArray = countableArray;
+
+  ASSERT_EQ(Countable::Count(), 8);
+
+  nsTArray<Countable> copyCountableArray(constRefCountableArray.Clone());
+
+  ASSERT_EQ(Countable::Count(), 12);
+
+  nsTArray<Countable>&& moveRefCountableArray = std::move(countableArray);
+  moveRefCountableArray.Length();  // Make compilers happy.
+
+  ASSERT_EQ(Countable::Count(), 12);
+
+  nsTArray<Countable> movedCountableArray(std::move(countableArray));
+
+  ASSERT_EQ(Countable::Count(), 12);
+
+  // Test ctor
+  FallibleTArray<Countable> differentAllocatorCountableArray(
+      std::move(copyCountableArray));
+  // operator=
+  copyCountableArray = std::move(differentAllocatorCountableArray);
+  differentAllocatorCountableArray = std::move(copyCountableArray);
+  // And the other ctor
+  nsTArray<Countable> copyCountableArray2(
+      std::move(differentAllocatorCountableArray));
+  // with auto
+  AutoTArray<Countable, 3> autoCountableArray(std::move(copyCountableArray2));
+  // operator=
+  copyCountableArray2 = std::move(autoCountableArray);
+  // Mix with FallibleTArray
+  FallibleTArray<Countable> differentAllocatorCountableArray2(
+      std::move(copyCountableArray2));
+  AutoTArray<Countable, 4> autoCountableArray2(
+      std::move(differentAllocatorCountableArray2));
+  differentAllocatorCountableArray2 = std::move(autoCountableArray2);
+
+  ASSERT_EQ(Countable::Count(), 12);
+
+  nsTArray<Moveable> moveableArray;
+  for (i = 0; i < 4; ++i) {
+    moveableArray.AppendElement(Moveable());
+  }
+
+  ASSERT_EQ(Moveable::Count(), 4);
+
+  const nsTArray<Moveable>& constRefMoveableArray = moveableArray;
+
+  ASSERT_EQ(Moveable::Count(), 4);
+
+  nsTArray<Moveable> copyMoveableArray(constRefMoveableArray.Clone());
+
+  ASSERT_EQ(Moveable::Count(), 8);
+
+  nsTArray<Moveable>&& moveRefMoveableArray = std::move(moveableArray);
+  moveRefMoveableArray.Length();  // Make compilers happy.
+
+  ASSERT_EQ(Moveable::Count(), 8);
+
+  nsTArray<Moveable> movedMoveableArray(std::move(moveableArray));
+
+  ASSERT_EQ(Moveable::Count(), 8);
+
+  // Test ctor
+  FallibleTArray<Moveable> differentAllocatorMoveableArray(
+      std::move(copyMoveableArray));
+  // operator=
+  copyMoveableArray = std::move(differentAllocatorMoveableArray);
+  differentAllocatorMoveableArray = std::move(copyMoveableArray);
+  // And the other ctor
+  nsTArray<Moveable> copyMoveableArray2(
+      std::move(differentAllocatorMoveableArray));
+  // with auto
+  AutoTArray<Moveable, 3> autoMoveableArray(std::move(copyMoveableArray2));
+  // operator=
+  copyMoveableArray2 = std::move(autoMoveableArray);
+  // Mix with FallibleTArray
+  FallibleTArray<Moveable> differentAllocatorMoveableArray2(
+      std::move(copyMoveableArray2));
+  AutoTArray<Moveable, 4> autoMoveableArray2(
+      std::move(differentAllocatorMoveableArray2));
+  differentAllocatorMoveableArray2 = std::move(autoMoveableArray2);
+
+  ASSERT_EQ(Moveable::Count(), 8);
+
+  AutoTArray<Moveable, 8> moveableAutoArray;
+  for (uint32_t i = 0; i < 4; ++i) {
+    moveableAutoArray.AppendElement(Moveable());
+  }
+
+  ASSERT_EQ(Moveable::Count(), 12);
+
+  const AutoTArray<Moveable, 8>& constRefMoveableAutoArray = moveableAutoArray;
+
+  ASSERT_EQ(Moveable::Count(), 12);
+
+  CopyableAutoTArray<Moveable, 8> copyMoveableAutoArray(
+      constRefMoveableAutoArray);
+
+  ASSERT_EQ(Moveable::Count(), 16);
+
+  AutoTArray<Moveable, 8> movedMoveableAutoArray(std::move(moveableAutoArray));
+
+  ASSERT_EQ(Moveable::Count(), 16);
+}
+
+template <typename TypeParam>
+class TArray_MoveOnlyTest : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(TArray_MoveOnlyTest);
+
+static constexpr size_t kMoveOnlyTestArrayLength = 4;
+
+template <typename ArrayType>
+static auto MakeMoveOnlyArray() {
+  ArrayType moveOnlyArray;
+  for (size_t i = 0; i < kMoveOnlyTestArrayLength; ++i) {
+    EXPECT_TRUE(moveOnlyArray.AppendElement(typename ArrayType::value_type(),
+                                            fallible));
+  }
+  return moveOnlyArray;
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, nsTArray_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  nsTArray<TypeParam> movedMoveOnlyArray(std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, movedMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, nsTArray_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  nsTArray<TypeParam> movedMoveOnlyArray;
+  movedMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, movedMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, nsTArray_MoveReAssign) {
+  nsTArray<TypeParam> movedMoveOnlyArray;
+  movedMoveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  // Re-assign, to check that move-assign does not only work on an empty array.
+  movedMoveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+
+  ASSERT_EQ(kMoveOnlyTestArrayLength, movedMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, nsTArray_to_FallibleTArray_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  FallibleTArray<TypeParam> differentAllocatorMoveOnlyArray(
+      std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, differentAllocatorMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, nsTArray_to_FallibleTArray_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  FallibleTArray<TypeParam> differentAllocatorMoveOnlyArray;
+  differentAllocatorMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, differentAllocatorMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, FallibleTArray_to_nsTArray_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<FallibleTArray<TypeParam>>();
+  nsTArray<TypeParam> differentAllocatorMoveOnlyArray(std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, differentAllocatorMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, FallibleTArray_to_nsTArray_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<FallibleTArray<TypeParam>>();
+  nsTArray<TypeParam> differentAllocatorMoveOnlyArray;
+  differentAllocatorMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, differentAllocatorMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, AutoTArray_AutoStorage_MoveConstruct) {
+  auto moveOnlyArray =
+      MakeMoveOnlyArray<AutoTArray<TypeParam, kMoveOnlyTestArrayLength>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength> autoMoveOnlyArray(
+      std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest, AutoTArray_AutoStorage_MoveAssign) {
+  auto moveOnlyArray =
+      MakeMoveOnlyArray<AutoTArray<TypeParam, kMoveOnlyTestArrayLength>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength> autoMoveOnlyArray;
+  autoMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             nsTArray_to_AutoTArray_AutoStorage_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength> autoMoveOnlyArray(
+      std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             nsTArray_to_AutoTArray_AutoStorage_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength> autoMoveOnlyArray;
+  autoMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             nsTArray_to_AutoTArray_HeapStorage_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength - 1> autoMoveOnlyArray(
+      std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             nsTArray_to_AutoTArray_HeapStorage_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<nsTArray<TypeParam>>();
+  AutoTArray<TypeParam, kMoveOnlyTestArrayLength - 1> autoMoveOnlyArray;
+  autoMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             FallibleTArray_to_AutoTArray_HeapStorage_MoveConstruct) {
+  auto moveOnlyArray = MakeMoveOnlyArray<FallibleTArray<TypeParam>>();
+  AutoTArray<TypeParam, 4> autoMoveOnlyArray(std::move(moveOnlyArray));
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+TYPED_TEST_P(TArray_MoveOnlyTest,
+             FallibleTArray_to_AutoTArray_HeapStorage_MoveAssign) {
+  auto moveOnlyArray = MakeMoveOnlyArray<FallibleTArray<TypeParam>>();
+  AutoTArray<TypeParam, 4> autoMoveOnlyArray;
+  autoMoveOnlyArray = std::move(moveOnlyArray);
+
+  ASSERT_EQ(0u, moveOnlyArray.Length());
+  ASSERT_EQ(kMoveOnlyTestArrayLength, autoMoveOnlyArray.Length());
+}
+
+REGISTER_TYPED_TEST_SUITE_P(
+    TArray_MoveOnlyTest, nsTArray_MoveConstruct, nsTArray_MoveAssign,
+    nsTArray_MoveReAssign, nsTArray_to_FallibleTArray_MoveConstruct,
+    nsTArray_to_FallibleTArray_MoveAssign,
+    FallibleTArray_to_nsTArray_MoveConstruct,
+    FallibleTArray_to_nsTArray_MoveAssign, AutoTArray_AutoStorage_MoveConstruct,
+    AutoTArray_AutoStorage_MoveAssign,
+    nsTArray_to_AutoTArray_AutoStorage_MoveConstruct,
+    nsTArray_to_AutoTArray_AutoStorage_MoveAssign,
+    nsTArray_to_AutoTArray_HeapStorage_MoveConstruct,
+    nsTArray_to_AutoTArray_HeapStorage_MoveAssign,
+    FallibleTArray_to_AutoTArray_HeapStorage_MoveConstruct,
+    FallibleTArray_to_AutoTArray_HeapStorage_MoveAssign);
+
+using BothMoveOnlyTypes =
+    ::testing::Types<MoveOnly_RelocateUsingMemutils,
+                     MoveOnly_RelocateUsingMoveConstructor>;
+INSTANTIATE_TYPED_TEST_SUITE_P(InstantiationOf, TArray_MoveOnlyTest,
+                               BothMoveOnlyTypes);
+
+//----
+
+TEST(TArray, test_string_array)
+{
+  nsTArray<nsCString> strArray;
+  const char kdata[] = "hello world";
+  size_t i;
+  for (i = 0; i < ArrayLength(kdata); ++i) {
+    nsCString str;
+    str.Assign(kdata[i]);
+    strArray.AppendElement(str);
+  }
+  for (i = 0; i < ArrayLength(kdata); ++i) {
+    ASSERT_EQ(strArray[i].CharAt(0), kdata[i]);
+  }
+
+  const char kextra[] = "foo bar";
+  size_t oldLen = strArray.Length();
+  strArray.AppendElement(kextra);
+  strArray.RemoveElement(kextra);
+  ASSERT_EQ(oldLen, strArray.Length());
+
+  ASSERT_EQ(strArray.IndexOf("e"), size_t(1));
+  ASSERT_TRUE(strArray.ApplyIf(
+      "e", [](size_t i, nsCString& s) { return i == 1 && s == "e"; },
+      []() { return false; }));
+
+  strArray.Sort();
+  const char ksorted[] = "\0 dehllloorw";
+  for (i = ArrayLength(kdata); i--;) {
+    ASSERT_EQ(strArray[i].CharAt(0), ksorted[i]);
+    if (i > 0 && strArray[i] == strArray[i - 1]) strArray.RemoveElementAt(i);
+  }
+  for (i = 0; i < strArray.Length(); ++i) {
+    ASSERT_EQ(strArray.BinaryIndexOf(strArray[i]), i);
+  }
+  auto no_index = strArray.NoIndex;  // Fixes gtest compilation error
+  ASSERT_EQ(strArray.BinaryIndexOf(""_ns), no_index);
+
+  nsCString rawArray[MOZ_ARRAY_LENGTH(kdata) - 1];
+  for (i = 0; i < ArrayLength(rawArray); ++i)
+    rawArray[i].Assign(kdata + i);  // substrings of kdata
+
+  ASSERT_TRUE(
+      test_basic_array(rawArray, ArrayLength(rawArray), nsCString("foopy")));
+}
+
+//----
+
+typedef nsCOMPtr<nsIFile> FilePointer;
+
+class nsFileNameComparator {
+ public:
+  bool Equals(const FilePointer& a, const char* b) const {
+    nsAutoCString name;
+    a->GetNativeLeafName(name);
+    return name.Equals(b);
+  }
+};
+
+TEST(TArray, test_comptr_array)
+{
+  FilePointer tmpDir;
+  NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tmpDir));
+  ASSERT_TRUE(tmpDir);
+  const char* kNames[] = {"foo.txt", "bar.html", "baz.gif"};
+  nsTArray<FilePointer> fileArray;
+  size_t i;
+  for (i = 0; i < ArrayLength(kNames); ++i) {
+    FilePointer f;
+    tmpDir->Clone(getter_AddRefs(f));
+    ASSERT_TRUE(f);
+    ASSERT_NS_SUCCEEDED(f->AppendNative(nsDependentCString(kNames[i])));
+    fileArray.AppendElement(f);
+  }
+
+  ASSERT_EQ(fileArray.IndexOf(kNames[1], 0, nsFileNameComparator()), size_t(1));
+  ASSERT_TRUE(fileArray.ApplyIf(
+      kNames[1], 0, nsFileNameComparator(), [](size_t i) { return i == 1; },
+      []() { return false; }));
+
+  // It's unclear what 'operator<' means for nsCOMPtr, but whatever...
+  ASSERT_TRUE(
+      test_basic_array(fileArray.Elements(), fileArray.Length(), tmpDir));
+}
+
+//----
+
+class RefcountedObject {
+ public:
+  RefcountedObject() : rc(0) {}
+  void AddRef() { ++rc; }
+  void Release() {
+    if (--rc == 0) delete this;
+  }
+  ~RefcountedObject() = default;
+
+ private:
+  int32_t rc;
+};
+
+TEST(TArray, test_refptr_array)
+{
+  nsTArray<RefPtr<RefcountedObject>> objArray;
+
+  RefcountedObject* a = new RefcountedObject();
+  a->AddRef();
+  RefcountedObject* b = new RefcountedObject();
+  b->AddRef();
+  RefcountedObject* c = new RefcountedObject();
+  c->AddRef();
+
+  objArray.AppendElement(a);
+  objArray.AppendElement(b);
+  objArray.AppendElement(c);
+
+  ASSERT_EQ(objArray.IndexOf(b), size_t(1));
+  ASSERT_TRUE(objArray.ApplyIf(
+      b,
+      [&](size_t i, RefPtr<RefcountedObject>& r) { return i == 1 && r == b; },
+      []() { return false; }));
+
+  a->Release();
+  b->Release();
+  c->Release();
+}
+
+//----
+
+TEST(TArray, test_ptrarray)
+{
+  nsTArray<uint32_t*> ary;
+  ASSERT_EQ(ary.SafeElementAt(0), nullptr);
+  ASSERT_EQ(ary.SafeElementAt(1000), nullptr);
+
+  uint32_t a = 10;
+  ary.AppendElement(&a);
+  ASSERT_EQ(*ary[0], a);
+  ASSERT_EQ(*ary.SafeElementAt(0), a);
+
+  nsTArray<const uint32_t*> cary;
+  ASSERT_EQ(cary.SafeElementAt(0), nullptr);
+  ASSERT_EQ(cary.SafeElementAt(1000), nullptr);
+
+  const uint32_t b = 14;
+  cary.AppendElement(&a);
+  cary.AppendElement(&b);
+  ASSERT_EQ(*cary[0], a);
+  ASSERT_EQ(*cary[1], b);
+  ASSERT_EQ(*cary.SafeElementAt(0), a);
+  ASSERT_EQ(*cary.SafeElementAt(1), b);
+}
+
+//----
+
+// This test relies too heavily on the existence of DebugGetHeader to be
+// useful in non-debug builds.
+#ifdef DEBUG
+TEST(TArray, test_autoarray)
+{
+  uint32_t data[] = {4, 6, 8, 2, 4, 1, 5, 7, 3};
+  AutoTArray<uint32_t, MOZ_ARRAY_LENGTH(data)> array;
+
+  void* hdr = array.DebugGetHeader();
+  ASSERT_NE(hdr, nsTArray<uint32_t>().DebugGetHeader());
+  ASSERT_NE(hdr,
+            (AutoTArray<uint32_t, MOZ_ARRAY_LENGTH(data)>().DebugGetHeader()));
+
+  array.AppendElement(1u);
+  ASSERT_EQ(hdr, array.DebugGetHeader());
+
+  array.RemoveElement(1u);
+  array.AppendElements(data, ArrayLength(data));
+  ASSERT_EQ(hdr, array.DebugGetHeader());
+
+  array.AppendElement(2u);
+  ASSERT_NE(hdr, array.DebugGetHeader());
+
+  array.Clear();
+  array.Compact();
+  ASSERT_EQ(hdr, array.DebugGetHeader());
+  array.AppendElements(data, ArrayLength(data));
+  ASSERT_EQ(hdr, array.DebugGetHeader());
+
+  nsTArray<uint32_t> array2;
+  void* emptyHdr = array2.DebugGetHeader();
+  array.SwapElements(array2);
+  ASSERT_NE(emptyHdr, array.DebugGetHeader());
+  ASSERT_NE(hdr, array2.DebugGetHeader());
+  size_t i;
+  for (i = 0; i < ArrayLength(data); ++i) {
+    ASSERT_EQ(array2[i], data[i]);
+  }
+  ASSERT_TRUE(array.IsEmpty());
+
+  array.Compact();
+  array.AppendElements(data, ArrayLength(data));
+  uint32_t data3[] = {5, 7, 11};
+  AutoTArray<uint32_t, MOZ_ARRAY_LENGTH(data3)> array3;
+  array3.AppendElements(data3, ArrayLength(data3));
+  array.SwapElements(array3);
+  for (i = 0; i < ArrayLength(data); ++i) {
+    ASSERT_EQ(array3[i], data[i]);
+  }
+  for (i = 0; i < ArrayLength(data3); ++i) {
+    ASSERT_EQ(array[i], data3[i]);
+  }
+}
+#endif
+
+//----
+
+// IndexOf used to potentially scan beyond the end of the array.  Test for
+// this incorrect behavior by adding a value (5), removing it, then seeing
+// if IndexOf finds it.
+TEST(TArray, test_indexof)
+{
+  nsTArray<int> array;
+  array.AppendElement(0);
+  // add and remove the 5
+  array.AppendElement(5);
+  array.RemoveElementAt(1);
+  // we should not find the 5!
+  auto no_index = array.NoIndex;  // Fixes gtest compilation error.
+  ASSERT_EQ(array.IndexOf(5, 1), no_index);
+  ASSERT_FALSE(array.ApplyIf(
+      5, 1, []() { return true; }, []() { return false; }));
+}
+
+//----
+
+template <class Array>
+static bool is_heap(const Array& ary, size_t len) {
+  size_t index = 1;
+  while (index < len) {
+    if (ary[index] > ary[(index - 1) >> 1]) return false;
+    index++;
+  }
+  return true;
+}
+
+//----
+
+// An array |arr| is using its auto buffer if |&arr < arr.Elements()| and
+// |arr.Elements() - &arr| is small.
+
+#define IS_USING_AUTO(arr)                            \
+  ((uintptr_t) & (arr) < (uintptr_t)arr.Elements() && \
+   ((ptrdiff_t)arr.Elements() - (ptrdiff_t)&arr) <= 16)
+
+#define CHECK_IS_USING_AUTO(arr)     \
+  do {                               \
+    ASSERT_TRUE(IS_USING_AUTO(arr)); \
+  } while (0)
+
+#define CHECK_NOT_USING_AUTO(arr)     \
+  do {                                \
+    ASSERT_FALSE(IS_USING_AUTO(arr)); \
+  } while (0)
+
+#define CHECK_USES_SHARED_EMPTY_HDR(arr)          \
+  do {                                            \
+    nsTArray<int> _empty;                         \
+    ASSERT_EQ(_empty.Elements(), arr.Elements()); \
+  } while (0)
+
+#define CHECK_EQ_INT(actual, expected) \
+  do {                                 \
+    ASSERT_EQ((actual), (expected));   \
+  } while (0)
+
+#define CHECK_ARRAY(arr, data)                               \
+  do {                                                       \
+    CHECK_EQ_INT((arr).Length(), (size_t)ArrayLength(data)); \
+    for (size_t _i = 0; _i < ArrayLength(data); _i++) {      \
+      CHECK_EQ_INT((arr)[_i], (data)[_i]);                   \
+    }                                                        \
+  } while (0)
+
+TEST(TArray, test_swap)
+{
+  // Test nsTArray::SwapElements.  Unfortunately there are many cases.
+  int data1[] = {8, 6, 7, 5};
+  int data2[] = {3, 0, 9};
+
+  // Swap two auto arrays.
+  {
+    AutoTArray<int, 8> a;
+    AutoTArray<int, 6> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+    b.AppendElements(data2, ArrayLength(data2));
+    CHECK_IS_USING_AUTO(a);
+    CHECK_IS_USING_AUTO(b);
+
+    a.SwapElements(b);
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_IS_USING_AUTO(b);
+    CHECK_ARRAY(a, data2);
+    CHECK_ARRAY(b, data1);
+  }
+
+  // Swap two auto arrays -- one whose data lives on the heap, the other whose
+  // data lives on the stack -- which each fits into the other's auto storage.
+  {
+    AutoTArray<int, 3> a;
+    AutoTArray<int, 3> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+    a.RemoveElementAt(3);
+    b.AppendElements(data2, ArrayLength(data2));
+
+    // Here and elsewhere, we assert that if we start with an auto array
+    // capable of storing N elements, we store N+1 elements into the array, and
+    // then we remove one element, that array is still not using its auto
+    // buffer.
+    //
+    // This isn't at all required by the TArray API. It would be fine if, when
+    // we shrink back to N elements, the TArray frees its heap storage and goes
+    // back to using its stack storage.  But we assert here as a check that the
+    // test does what we expect.  If the TArray implementation changes, just
+    // change the failing assertions.
+    CHECK_NOT_USING_AUTO(a);
+
+    // This check had better not change, though.
+    CHECK_IS_USING_AUTO(b);
+
+    a.SwapElements(b);
+
+    CHECK_IS_USING_AUTO(b);
+    CHECK_ARRAY(a, data2);
+    int expectedB[] = {8, 6, 7};
+    CHECK_ARRAY(b, expectedB);
+  }
+
+  // Swap two auto arrays which are using heap storage such that one fits into
+  // the other's auto storage, but the other needs to stay on the heap.
+  {
+    AutoTArray<int, 3> a;
+    AutoTArray<int, 2> b;
+    a.AppendElements(data1, ArrayLength(data1));
+    a.RemoveElementAt(3);
+
+    b.AppendElements(data2, ArrayLength(data2));
+    b.RemoveElementAt(2);
+
+    CHECK_NOT_USING_AUTO(a);
+    CHECK_NOT_USING_AUTO(b);
+
+    a.SwapElements(b);
+
+    CHECK_NOT_USING_AUTO(b);
+
+    int expected1[] = {3, 0};
+    int expected2[] = {8, 6, 7};
+
+    CHECK_ARRAY(a, expected1);
+    CHECK_ARRAY(b, expected2);
+  }
+
+  // Swap two arrays, neither of which fits into the other's auto-storage.
+  {
+    AutoTArray<int, 1> a;
+    AutoTArray<int, 3> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+    b.AppendElements(data2, ArrayLength(data2));
+
+    a.SwapElements(b);
+
+    CHECK_ARRAY(a, data2);
+    CHECK_ARRAY(b, data1);
+  }
+
+  // Swap an empty nsTArray with a non-empty AutoTArray.
+  {
+    nsTArray<int> a;
+    AutoTArray<int, 3> b;
+
+    b.AppendElements(data2, ArrayLength(data2));
+    CHECK_IS_USING_AUTO(b);
+
+    a.SwapElements(b);
+
+    CHECK_ARRAY(a, data2);
+    CHECK_EQ_INT(b.Length(), size_t(0));
+    CHECK_IS_USING_AUTO(b);
+  }
+
+  // Swap two big auto arrays.
+  {
+    const unsigned size = 8192;
+    AutoTArray<unsigned, size> a;
+    AutoTArray<unsigned, size> b;
+
+    for (unsigned i = 0; i < size; i++) {
+      a.AppendElement(i);
+      b.AppendElement(i + 1);
+    }
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_IS_USING_AUTO(b);
+
+    a.SwapElements(b);
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_IS_USING_AUTO(b);
+
+    CHECK_EQ_INT(a.Length(), size_t(size));
+    CHECK_EQ_INT(b.Length(), size_t(size));
+
+    for (unsigned i = 0; i < size; i++) {
+      CHECK_EQ_INT(a[i], i + 1);
+      CHECK_EQ_INT(b[i], i);
+    }
+  }
+
+  // Swap two arrays and make sure that their capacities don't increase
+  // unnecessarily.
+  {
+    nsTArray<int> a;
+    nsTArray<int> b;
+    b.AppendElements(data2, ArrayLength(data2));
+
+    CHECK_EQ_INT(a.Capacity(), size_t(0));
+    size_t bCapacity = b.Capacity();
+
+    a.SwapElements(b);
+
+    // Make sure that we didn't increase the capacity of either array.
+    CHECK_ARRAY(a, data2);
+    CHECK_EQ_INT(b.Length(), size_t(0));
+    CHECK_EQ_INT(b.Capacity(), size_t(0));
+    CHECK_EQ_INT(a.Capacity(), bCapacity);
+  }
+
+  // Swap an auto array with a TArray, then clear the auto array and make sure
+  // it doesn't forget the fact that it has an auto buffer.
+  {
+    nsTArray<int> a;
+    AutoTArray<int, 3> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+
+    a.SwapElements(b);
+
+    CHECK_EQ_INT(a.Length(), size_t(0));
+    CHECK_ARRAY(b, data1);
+
+    b.Clear();
+
+    CHECK_USES_SHARED_EMPTY_HDR(a);
+    CHECK_IS_USING_AUTO(b);
+  }
+
+  // Same thing as the previous test, but with more auto arrays.
+  {
+    AutoTArray<int, 16> a;
+    AutoTArray<int, 3> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+
+    a.SwapElements(b);
+
+    CHECK_EQ_INT(a.Length(), size_t(0));
+    CHECK_ARRAY(b, data1);
+
+    b.Clear();
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_IS_USING_AUTO(b);
+  }
+
+  // Swap an empty nsTArray and an empty AutoTArray.
+  {
+    AutoTArray<int, 8> a;
+    nsTArray<int> b;
+
+    a.SwapElements(b);
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_NOT_USING_AUTO(b);
+    CHECK_EQ_INT(a.Length(), size_t(0));
+    CHECK_EQ_INT(b.Length(), size_t(0));
+  }
+
+  // Swap empty auto array with non-empty AutoTArray using malloc'ed storage.
+  // I promise, all these tests have a point.
+  {
+    AutoTArray<int, 2> a;
+    AutoTArray<int, 1> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+
+    a.SwapElements(b);
+
+    CHECK_IS_USING_AUTO(a);
+    CHECK_NOT_USING_AUTO(b);
+    CHECK_ARRAY(b, data1);
+    CHECK_EQ_INT(a.Length(), size_t(0));
+  }
+
+  // Test fallible SwapElements of nsTArray.
+  {
+    nsTArray<int> a;
+    nsTArray<int> b;
+
+    a.AppendElements(data1, ArrayLength(data1));
+
+    ASSERT_TRUE(a.SwapElements(b, fallible));
+
+    CHECK_ARRAY(b, data1);
+    CHECK_EQ_INT(a.Length(), size_t(0));
+  }
+
+  // Test fallible SwapElements of FallibleTArray.
+  {
+    FallibleTArray<int> a;
+    FallibleTArray<int> b;
+
+    ASSERT_TRUE(a.AppendElements(data1, ArrayLength(data1), fallible));
+
+    ASSERT_TRUE(a.SwapElements(b, fallible));
+
+    CHECK_ARRAY(b, data1);
+    CHECK_EQ_INT(a.Length(), size_t(0));
+  }
+
+  // Test fallible SwapElements of FallibleTArray with large AutoTArray.
+  {
+    FallibleTArray<int> a;
+    AutoTArray<int, 8192> b;
+
+    ASSERT_TRUE(a.AppendElements(data1, ArrayLength(data1), fallible));
+
+    ASSERT_TRUE(a.SwapElements(b, fallible));
+
+    CHECK_IS_USING_AUTO(b);
+    CHECK_ARRAY(b, data1);
+    CHECK_EQ_INT(a.Length(), size_t(0));
+  }
+}
+
+// Bug 1171296: Disabled on andoid due to crashes.
+#if !defined(ANDROID)
+TEST(TArray, test_fallible)
+{
+  // Test that FallibleTArray works properly; that is, it never OOMs, but
+  // instead eventually returns false.
+  //
+  // This test is only meaningful on 32-bit systems.  On a 64-bit system, we
+  // might never OOM.
+  if (sizeof(void*) > 4) {
+    ASSERT_TRUE(true);
+    return;
+  }
+
+  // Allocate a bunch of 128MB arrays.  Larger allocations will fail on some
+  // platforms without actually hitting OOM.
+  //
+  // 36 * 128MB > 4GB, so we should definitely OOM by the 36th array.
+  const unsigned numArrays = 36;
+  FallibleTArray<char> arrays[numArrays];
+  bool oomed = false;
+  for (size_t i = 0; i < numArrays; i++) {
+    // SetCapacity allocates the requested capacity + a header, and we want to
+    // avoid allocating more than 128MB overall because of the size padding it
+    // will cause, which depends on allocator behavior, so use 128MB - an
+    // arbitrary size larger than the array header, so that chances are good
+    // that allocations will always be 128MB.
+    bool success = arrays[i].SetCapacity(128 * 1024 * 1024 - 1024, fallible);
+    if (!success) {
+      // We got our OOM.  Check that it didn't come too early.
+      oomed = true;
+#  ifdef XP_WIN
+      // 32-bit Windows sometimes OOMs on the 6th, 7th, or 8th.  To keep the
+      // test green, choose the lower of those: the important thing here is
+      // that some allocations fail and some succeed.  We're not too
+      // concerned about how many iterations it takes.
+      const size_t kOOMIterations = 6;
+#  else
+      const size_t kOOMIterations = 8;
+#  endif
+      ASSERT_GE(i, kOOMIterations)
+          << "Got OOM on iteration " << i << ". Too early!";
+    }
+  }
+
+  ASSERT_TRUE(oomed)
+  << "Didn't OOM or crash?  nsTArray::SetCapacity"
+     "must be lying.";
+}
+#endif
+
+TEST(TArray, test_conversion_operator)
+{
+  FallibleTArray<int> f;
+  const FallibleTArray<int> fconst;
+
+  nsTArray<int> t;
+  const nsTArray<int> tconst;
+  AutoTArray<int, 8> tauto;
+  const AutoTArray<int, 8> tautoconst;
+
+#define CHECK_ARRAY_CAST(type)                  \
+  do {                                          \
+    const type<int>& z1 = f;                    \
+    ASSERT_EQ((void*)&z1, (void*)&f);           \
+    const type<int>& z2 = fconst;               \
+    ASSERT_EQ((void*)&z2, (void*)&fconst);      \
+    const type<int>& z9 = t;                    \
+    ASSERT_EQ((void*)&z9, (void*)&t);           \
+    const type<int>& z10 = tconst;              \
+    ASSERT_EQ((void*)&z10, (void*)&tconst);     \
+    const type<int>& z11 = tauto;               \
+    ASSERT_EQ((void*)&z11, (void*)&tauto);      \
+    const type<int>& z12 = tautoconst;          \
+    ASSERT_EQ((void*)&z12, (void*)&tautoconst); \
+  } while (0)
+
+  CHECK_ARRAY_CAST(FallibleTArray);
+  CHECK_ARRAY_CAST(nsTArray);
+
+#undef CHECK_ARRAY_CAST
+}
+
+template <class T>
+struct BufAccessor : public T {
+  void* GetHdr() { return T::mHdr; }
+};
+
+TEST(TArray, test_SetLengthAndRetainStorage_no_ctor)
+{
+  // 1050 because sizeof(int)*1050 is more than a page typically.
+  const int N = 1050;
+  FallibleTArray<int> f;
+
+  nsTArray<int> t;
+  AutoTArray<int, N> tauto;
+
+#define LPAREN (
+#define RPAREN )
+#define FOR_EACH(pre, post) \
+  do {                      \
+    pre f post;             \
+    pre t post;             \
+    pre tauto post;         \
+  } while (0)
+
+  // Setup test arrays.
+  FOR_EACH(; Unused <<, .SetLength(N, fallible));
+  for (int n = 0; n < N; ++n) {
+    FOR_EACH(;, [n] = n);
+  }
+
+  void* initial_Hdrs[] = {
+      static_cast<BufAccessor<FallibleTArray<int>>&>(f).GetHdr(),
+      static_cast<BufAccessor<nsTArray<int>>&>(t).GetHdr(),
+      static_cast<BufAccessor<AutoTArray<int, N>>&>(tauto).GetHdr(), nullptr};
+
+  // SetLengthAndRetainStorage(n), should NOT overwrite memory when T hasn't
+  // a default constructor.
+  FOR_EACH(;, .SetLengthAndRetainStorage(8));
+  FOR_EACH(;, .SetLengthAndRetainStorage(12));
+  for (int n = 0; n < 12; ++n) {
+    ASSERT_EQ(f[n], n);
+    ASSERT_EQ(t[n], n);
+    ASSERT_EQ(tauto[n], n);
+  }
+  FOR_EACH(;, .SetLengthAndRetainStorage(0));
+  FOR_EACH(;, .SetLengthAndRetainStorage(N));
+  for (int n = 0; n < N; ++n) {
+    ASSERT_EQ(f[n], n);
+    ASSERT_EQ(t[n], n);
+    ASSERT_EQ(tauto[n], n);
+  }
+
+  void* current_Hdrs[] = {
+      static_cast<BufAccessor<FallibleTArray<int>>&>(f).GetHdr(),
+      static_cast<BufAccessor<nsTArray<int>>&>(t).GetHdr(),
+      static_cast<BufAccessor<AutoTArray<int, N>>&>(tauto).GetHdr(), nullptr};
+
+  // SetLengthAndRetainStorage(n) should NOT have reallocated the internal
+  // memory.
+  ASSERT_EQ(sizeof(initial_Hdrs), sizeof(current_Hdrs));
+  for (size_t n = 0; n < sizeof(current_Hdrs) / sizeof(current_Hdrs[0]); ++n) {
+    ASSERT_EQ(current_Hdrs[n], initial_Hdrs[n]);
+  }
+
+#undef FOR_EACH
+#undef LPAREN
+#undef RPAREN
+}
+
+template <typename Comparator>
+bool TestCompareMethods(const Comparator& aComp) {
+  nsTArray<int> ary({57, 4, 16, 17, 3, 5, 96, 12});
+
+  ary.Sort(aComp);
+
+  const int sorted[] = {3, 4, 5, 12, 16, 17, 57, 96};
+  for (size_t i = 0; i < MOZ_ARRAY_LENGTH(sorted); i++) {
+    if (sorted[i] != ary[i]) {
+      return false;
+    }
+  }
+
+  if (!ary.ContainsSorted(5, aComp)) {
+    return false;
+  }
+  if (ary.ContainsSorted(42, aComp)) {
+    return false;
+  }
+
+  if (ary.BinaryIndexOf(16, aComp) != 4) {
+    return false;
+  }
+
+  return true;
+}
+
+struct IntComparator {
+  bool Equals(int aLeft, int aRight) const { return aLeft == aRight; }
+
+  bool LessThan(int aLeft, int aRight) const { return aLeft < aRight; }
+};
+
+TEST(TArray, test_comparator_objects)
+{
+  ASSERT_TRUE(TestCompareMethods(IntComparator()));
+  ASSERT_TRUE(
+      TestCompareMethods([](int aLeft, int aRight) { return aLeft - aRight; }));
+}
+
+struct Big {
+  uint64_t size[40] = {};
+};
+
+TEST(TArray, test_AutoTArray_SwapElements)
+{
+  AutoTArray<Big, 40> oneArray;
+  AutoTArray<Big, 40> another;
+
+  for (size_t i = 0; i < 8; ++i) {
+    oneArray.AppendElement(Big());
+  }
+  oneArray[0].size[10] = 1;
+  for (size_t i = 0; i < 9; ++i) {
+    another.AppendElement(Big());
+  }
+  oneArray.SwapElements(another);
+
+  ASSERT_EQ(oneArray.Length(), 9u);
+  ASSERT_EQ(another.Length(), 8u);
+
+  ASSERT_EQ(oneArray[0].size[10], 0u);
+  ASSERT_EQ(another[0].size[10], 1u);
+}
+
+}  // namespace TestTArray