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-rw-r--r--xpcom/tests/gtest/TestObserverArray.cpp573
1 files changed, 573 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestObserverArray.cpp b/xpcom/tests/gtest/TestObserverArray.cpp
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+++ b/xpcom/tests/gtest/TestObserverArray.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:cindent:ts=4:et:sw=4:
+/* 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 "nsTObserverArray.h"
+#include "gtest/gtest.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/UniquePtr.h"
+
+using namespace mozilla;
+
+typedef nsTObserverArray<int> IntArray;
+
+#define DO_TEST(_type, _exp, _code) \
+ do { \
+ ++testNum; \
+ count = 0; \
+ IntArray::_type iter(arr); \
+ while (iter.HasMore() && count != ArrayLength(_exp)) { \
+ _code int next = iter.GetNext(); \
+ int expected = _exp[count++]; \
+ ASSERT_EQ(next, expected) \
+ << "During test " << testNum << " at position " << count - 1; \
+ } \
+ ASSERT_FALSE(iter.HasMore()) \
+ << "During test " << testNum << ", iterator ran over"; \
+ ASSERT_EQ(count, ArrayLength(_exp)) \
+ << "During test " << testNum << ", iterator finished too early"; \
+ } while (0)
+
+// XXX Split this up into independent test cases
+TEST(ObserverArray, Tests)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t count;
+ int testNum = 0;
+
+ // Basic sanity
+ static int test1Expected[] = {3, 4};
+ DO_TEST(ForwardIterator, test1Expected, {/* nothing */});
+
+ // Appends
+ static int test2Expected[] = {3, 4, 2};
+ DO_TEST(ForwardIterator, test2Expected,
+ if (count == 1) arr.AppendElement(2););
+ DO_TEST(ForwardIterator, test2Expected, {/* nothing */});
+
+ DO_TEST(EndLimitedIterator, test2Expected,
+ if (count == 1) arr.AppendElement(5););
+
+ static int test5Expected[] = {3, 4, 2, 5};
+ DO_TEST(ForwardIterator, test5Expected, {/* nothing */});
+
+ // Removals
+ DO_TEST(ForwardIterator, test5Expected,
+ if (count == 1) arr.RemoveElementAt(0););
+
+ static int test7Expected[] = {4, 2, 5};
+ DO_TEST(ForwardIterator, test7Expected, {/* nothing */});
+
+ static int test8Expected[] = {4, 5};
+ DO_TEST(ForwardIterator, test8Expected,
+ if (count == 1) arr.RemoveElementAt(1););
+ DO_TEST(ForwardIterator, test8Expected, {/* nothing */});
+
+ arr.AppendElement(2);
+ arr.AppendElementUnlessExists(6);
+ static int test10Expected[] = {4, 5, 2, 6};
+ DO_TEST(ForwardIterator, test10Expected, {/* nothing */});
+
+ arr.AppendElementUnlessExists(5);
+ DO_TEST(ForwardIterator, test10Expected, {/* nothing */});
+
+ static int test12Expected[] = {4, 5, 6};
+ DO_TEST(ForwardIterator, test12Expected,
+ if (count == 1) arr.RemoveElementAt(2););
+ DO_TEST(ForwardIterator, test12Expected, {/* nothing */});
+
+ // Removals + Appends
+ static int test14Expected[] = {4, 6, 7};
+ DO_TEST(
+ ForwardIterator, test14Expected, if (count == 1) {
+ arr.RemoveElementAt(1);
+ arr.AppendElement(7);
+ });
+ DO_TEST(ForwardIterator, test14Expected, {/* nothing */});
+
+ arr.AppendElement(2);
+ static int test16Expected[] = {4, 6, 7, 2};
+ DO_TEST(ForwardIterator, test16Expected, {/* nothing */});
+
+ static int test17Expected[] = {4, 7, 2};
+ DO_TEST(
+ EndLimitedIterator, test17Expected, if (count == 1) {
+ arr.RemoveElementAt(1);
+ arr.AppendElement(8);
+ });
+
+ static int test18Expected[] = {4, 7, 2, 8};
+ DO_TEST(ForwardIterator, test18Expected, {/* nothing */});
+
+ // Prepends
+ arr.PrependElementUnlessExists(3);
+ static int test19Expected[] = {3, 4, 7, 2, 8};
+ DO_TEST(ForwardIterator, test19Expected, {/* nothing */});
+
+ arr.PrependElementUnlessExists(7);
+ DO_TEST(ForwardIterator, test19Expected, {/* nothing */});
+
+ DO_TEST(
+ ForwardIterator, test19Expected,
+ if (count == 1) { arr.PrependElementUnlessExists(9); });
+
+ static int test22Expected[] = {9, 3, 4, 7, 2, 8};
+ DO_TEST(ForwardIterator, test22Expected, {});
+
+ // BackwardIterator
+ static int test23Expected[] = {8, 2, 7, 4, 3, 9};
+ DO_TEST(BackwardIterator, test23Expected, );
+
+ // Removals
+ static int test24Expected[] = {8, 2, 7, 4, 9};
+ DO_TEST(BackwardIterator, test24Expected,
+ if (count == 1) arr.RemoveElementAt(1););
+
+ // Appends
+ DO_TEST(BackwardIterator, test24Expected,
+ if (count == 1) arr.AppendElement(1););
+
+ static int test26Expected[] = {1, 8, 2, 7, 4, 9};
+ DO_TEST(BackwardIterator, test26Expected, );
+
+ // Prepends
+ static int test27Expected[] = {1, 8, 2, 7, 4, 9, 3};
+ DO_TEST(BackwardIterator, test27Expected,
+ if (count == 1) arr.PrependElementUnlessExists(3););
+
+ // Removal using Iterator
+ DO_TEST(BackwardIterator, test27Expected,
+ // when this code runs, |GetNext()| has only been called once, so
+ // this actually removes the very first element
+ if (count == 1) iter.Remove(););
+
+ static int test28Expected[] = {8, 2, 7, 4, 9, 3};
+ DO_TEST(BackwardIterator, test28Expected, );
+
+ /**
+ * Note: _code is executed before the call to GetNext(), it can therefore not
+ * test the case of prepending when the BackwardIterator already returned the
+ * first element.
+ * In that case BackwardIterator does not traverse the newly prepended Element
+ */
+}
+
+TEST(ObserverArray, ForwardIterator_Remove)
+{
+ static const int expected[] = {3, 4};
+
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t count = 0;
+ for (auto iter = IntArray::ForwardIterator{arr}; iter.HasMore();) {
+ const int next = iter.GetNext();
+ iter.Remove();
+
+ ASSERT_EQ(expected[count++], next);
+ }
+ ASSERT_EQ(2u, count);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Forward_NonEmpty)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.ForwardRange()) {
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Forward_RemoveCurrent)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.ForwardRange()) {
+ sum += element;
+ ++iterations;
+ arr.RemoveElementAt(0);
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Forward_Append)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.ForwardRange()) {
+ if (!iterations) {
+ arr.AppendElement(5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(3u, iterations);
+ EXPECT_EQ(12, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Forward_Prepend)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.ForwardRange()) {
+ if (!iterations) {
+ arr.InsertElementAt(0, 5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Forward_Empty)
+{
+ IntArray arr;
+
+ size_t iterations = 0;
+ for (int element : arr.ForwardRange()) {
+ (void)element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(0u, iterations);
+}
+
+TEST(ObserverArray, RangeBasedFor_Reference_Forward_NonEmpty)
+{
+ const auto arr = [] {
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+ return arr;
+ }();
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (const UniquePtr<int>& element : arr.ForwardRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_NonConstReference_Forward_NonEmpty)
+{
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (UniquePtr<int>& element : arr.ForwardRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Backward_NonEmpty)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.BackwardRange()) {
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Backward_RemoveCurrent)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.BackwardRange()) {
+ sum += element;
+ ++iterations;
+ arr.RemoveElementAt(arr.Length() - 1);
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Backward_Append)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.BackwardRange()) {
+ if (!iterations) {
+ arr.AppendElement(5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Backward_Prepend)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.BackwardRange()) {
+ if (!iterations) {
+ arr.InsertElementAt(0, 5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(3u, iterations);
+ EXPECT_EQ(12, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_Backward_Empty)
+{
+ IntArray arr;
+
+ size_t iterations = 0;
+ for (int element : arr.BackwardRange()) {
+ (void)element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(0u, iterations);
+}
+
+TEST(ObserverArray, RangeBasedFor_Reference_Backward_NonEmpty)
+{
+ const auto arr = [] {
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+ return arr;
+ }();
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (const UniquePtr<int>& element : arr.BackwardRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_NonConstReference_Backward_NonEmpty)
+{
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (UniquePtr<int>& element : arr.BackwardRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_EndLimited_NonEmpty)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.EndLimitedRange()) {
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_EndLimited_RemoveCurrent)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.EndLimitedRange()) {
+ sum += element;
+ ++iterations;
+ arr.RemoveElementAt(0);
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_EndLimited_Append)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.EndLimitedRange()) {
+ if (!iterations) {
+ arr.AppendElement(5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_EndLimited_Prepend)
+{
+ IntArray arr;
+ arr.AppendElement(3);
+ arr.AppendElement(4);
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (int element : arr.EndLimitedRange()) {
+ if (!iterations) {
+ arr.InsertElementAt(0, 5);
+ }
+ sum += element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Value_EndLimited_Empty)
+{
+ IntArray arr;
+
+ size_t iterations = 0;
+ for (int element : arr.EndLimitedRange()) {
+ (void)element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(0u, iterations);
+}
+
+TEST(ObserverArray, RangeBasedFor_Reference_EndLimited_NonEmpty)
+{
+ const auto arr = [] {
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+ return arr;
+ }();
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (const UniquePtr<int>& element : arr.EndLimitedRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_NonConstReference_EndLimited_NonEmpty)
+{
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (UniquePtr<int>& element : arr.EndLimitedRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+TEST(ObserverArray, RangeBasedFor_Reference_NonObserving_NonEmpty)
+{
+ const auto arr = [] {
+ nsTObserverArray<UniquePtr<int>> arr;
+ arr.AppendElement(MakeUnique<int>(3));
+ arr.AppendElement(MakeUnique<int>(4));
+ return arr;
+ }();
+
+ size_t iterations = 0;
+ int sum = 0;
+ for (const UniquePtr<int>& element : arr.NonObservingRange()) {
+ sum += *element;
+ ++iterations;
+ }
+
+ EXPECT_EQ(2u, iterations);
+ EXPECT_EQ(7, sum);
+}
+
+// TODO add tests for EndLimitedIterator
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