| // Copyright 2021 The Pigweed 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 |
| // |
| // https://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 "pw_persistent_ram/persistent.h" |
| |
| #include <type_traits> |
| |
| #include "gtest/gtest.h" |
| |
| namespace pw::persistent_ram { |
| namespace { |
| |
| class PersistentTest : public ::testing::Test { |
| protected: |
| PersistentTest() { ZeroPersistentMemory(); } |
| |
| // Emulate invalidation of persistent section(s). |
| void ZeroPersistentMemory() { memset(&buffer_, 0, sizeof(buffer_)); } |
| |
| // Allocate a chunk of aligned storage that can be independently controlled. |
| std::aligned_storage_t<sizeof(Persistent<uint32_t>), |
| alignof(Persistent<uint32_t>)> |
| buffer_; |
| }; |
| |
| TEST_F(PersistentTest, DefaultConstructionAndDestruction) { |
| { // Emulate a boot where the persistent sections were invalidated. |
| // Although the fixture always does this, we do this an extra time to be |
| // 100% confident that an integrity check cannot be accidentally selected |
| // which results in reporting there is valid data when zero'd. |
| ZeroPersistentMemory(); |
| auto& persistent = *(new (&buffer_) Persistent<uint32_t>()); |
| EXPECT_FALSE(persistent.has_value()); |
| |
| persistent = 42; |
| ASSERT_TRUE(persistent.has_value()); |
| EXPECT_EQ(42u, persistent.value()); |
| |
| persistent.~Persistent(); // Emulate shutdown / global destructors. |
| } |
| |
| { // Emulate a boot where persistent memory was kept as is. |
| auto& persistent = *(new (&buffer_) Persistent<uint32_t>()); |
| ASSERT_TRUE(persistent.has_value()); |
| EXPECT_EQ(42u, persistent.value()); |
| } |
| } |
| |
| TEST_F(PersistentTest, Reset) { |
| { // Emulate a boot where the persistent sections were invalidated. |
| auto& persistent = *(new (&buffer_) Persistent<uint32_t>()); |
| persistent = 42u; |
| EXPECT_TRUE(persistent.has_value()); |
| persistent.reset(); |
| |
| persistent.~Persistent(); // Emulate shutdown / global destructors. |
| } |
| |
| { // Emulate a boot where persistent memory was kept as is. |
| auto& persistent = *(new (&buffer_) Persistent<uint32_t>()); |
| EXPECT_FALSE(persistent.has_value()); |
| } |
| } |
| |
| TEST_F(PersistentTest, Emplace) { |
| auto& persistent = *(new (&buffer_) Persistent<uint32_t>()); |
| EXPECT_FALSE(persistent.has_value()); |
| |
| persistent.emplace(42u); |
| ASSERT_TRUE(persistent.has_value()); |
| EXPECT_EQ(42u, persistent.value()); |
| } |
| |
| } // namespace |
| } // namespace pw::persistent_ram |