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mhsw-espurna/code/test/unit/settings/main.cpp

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#include <unity.h>
#include <Arduino.h>
#pragma GCC diagnostic warning "-Wall"
#pragma GCC diagnostic warning "-Wextra"
#pragma GCC diagnostic warning "-Wstrict-aliasing"
#pragma GCC diagnostic warning "-Wpointer-arith"
#pragma GCC diagnostic warning "-Wstrict-overflow=5"
#include <settings_embedis.h>
#include <array>
#include <algorithm>
#include <numeric>
namespace settings {
namespace embedis {
template <typename T>
struct StaticArrayStorage {
explicit StaticArrayStorage(T& blob) :
_blob(blob),
_size(blob.size())
{}
uint8_t read(size_t index) {
TEST_ASSERT_LESS_THAN(_size, index);
return _blob[index];
}
void write(size_t index, uint8_t value) {
TEST_ASSERT_LESS_THAN(_size, index);
_blob[index] = value;
}
void commit() {
}
T& _blob;
const size_t _size;
};
} // namespace embedis
} // namespace settings
template <size_t Size>
struct StorageHandler {
using array_type = std::array<uint8_t, Size>;
using storage_type = settings::embedis::StaticArrayStorage<array_type>;
using kvs_type = settings::embedis::KeyValueStore<storage_type>;
StorageHandler() :
kvs(std::move(storage_type{blob}), 0, Size)
{
blob.fill(0xff);
}
array_type blob;
kvs_type kvs;
};
// generate stuff depending on the mode
// - Indexed: key1:val1, key2:val2, ...
// - IncreasingLength: k:v, kk:vv, ...
struct TestSequentialKvGenerator {
using kv = std::pair<String, String>;
enum class Mode {
Indexed,
IncreasingLength
};
TestSequentialKvGenerator() = default;
explicit TestSequentialKvGenerator(Mode mode) :
_mode(mode)
{}
const kv& next() {
auto index = _index++;
_current.first = "";
_current.second = "";
switch (_mode) {
case Mode::Indexed:
_current.first = String("key") + String(index);
_current.second = String("val") + String(index);
break;
case Mode::IncreasingLength: {
size_t sizes = _index;
_current.first.reserve(sizes);
_current.second.reserve(sizes);
do {
_current.first += "k";
_current.second += "v";
} while (--sizes);
break;
}
}
TEST_ASSERT(_last.first != _current.first);
TEST_ASSERT(_last.second != _current.second);
return (_last = _current);
}
std::vector<kv> make(size_t size) {;
std::vector<kv> res;
for (size_t index = 0; index < size; ++index) {
res.push_back(next());
}
return res;
}
kv _current;
kv _last;
Mode _mode { Mode::Indexed };
size_t _index { 0 };
};
// ----------------------------------------------------------------------------
using TestStorageHandler = StorageHandler<1024>;
template <typename T>
void check_kv(T& instance, const String& key, const String& value) {
auto result = instance.kvs.get(key);
TEST_ASSERT_MESSAGE(static_cast<bool>(result), key.c_str());
TEST_ASSERT(result.value.length());
TEST_ASSERT_EQUAL_STRING(value.c_str(), result.value.c_str());
};
void test_sizes() {
// empty storage is still manageble, it just does not work :)
{
StorageHandler<0> empty;
TEST_ASSERT_EQUAL(0, empty.kvs.count());
TEST_ASSERT_FALSE(empty.kvs.set("cannot", "happen"));
TEST_ASSERT_FALSE(static_cast<bool>(empty.kvs.get("cannot")));
}
// some hard-coded estimates to notify us about internal changes
{
StorageHandler<16> instance;
TEST_ASSERT_EQUAL(0, instance.kvs.count());
TEST_ASSERT_EQUAL(16, instance.kvs.available());
TEST_ASSERT_EQUAL(0, settings::embedis::estimate("", "123456"));
TEST_ASSERT_EQUAL(16, settings::embedis::estimate("123456", "123456"));
TEST_ASSERT_EQUAL(10, settings::embedis::estimate("123", "123"));
TEST_ASSERT_EQUAL(9, settings::embedis::estimate("345", ""));
}
}
void test_longkey() {
TestStorageHandler instance;
const auto estimate = instance.kvs.size() - 6;
String key;
key.reserve(estimate);
for (size_t n = 0; n < estimate; ++n) {
key += 'a';
}
TEST_ASSERT(instance.kvs.set(key, ""));
auto result = instance.kvs.get(key);
TEST_ASSERT(static_cast<bool>(result));
}
void test_perseverance() {
// ensure we can handle setting the same key
using storage_type = StorageHandler<128>;
using blob_type = decltype(std::declval<storage_type>().blob);
// xxx: implementation detail?
// can we avoid blob modification when value is the same as the existing one
{
storage_type instance;
blob_type original(instance.blob);
TEST_ASSERT(instance.kvs.set("key", "value"));
TEST_ASSERT(instance.kvs.set("another", "keyvalue"));
TEST_ASSERT(original != instance.blob);
blob_type snapshot(instance.blob);
TEST_ASSERT(instance.kvs.set("key", "value"));
TEST_ASSERT(snapshot == instance.blob);
}
// xxx: pointless implementation detail?
// can we re-use existing 'value' storage and avoid data-shift
{
storage_type instance;
blob_type original(instance.blob);
// insert in a specific order, change middle
TEST_ASSERT(instance.kvs.set("aaa", "bbb"));
TEST_ASSERT(instance.kvs.set("cccc", "dd"));
TEST_ASSERT(instance.kvs.set("ee", "fffff"));
TEST_ASSERT(instance.kvs.set("cccc", "ff"));
TEST_ASSERT(original != instance.blob);
blob_type before(instance.blob);
// purge, insert again with updated values
TEST_ASSERT(instance.kvs.del("aaa"));
TEST_ASSERT(instance.kvs.del("cccc"));
TEST_ASSERT(instance.kvs.del("ee"));
TEST_ASSERT(instance.kvs.set("aaa", "bbb"));
TEST_ASSERT(instance.kvs.set("cccc", "ff"));
TEST_ASSERT(instance.kvs.set("ee", "fffff"));
blob_type after(instance.blob);
TEST_ASSERT(original != before);
TEST_ASSERT(original != after);
TEST_ASSERT(before == after);
}
}
template <size_t Size>
struct test_overflow_runner {
void operator ()() const {
StorageHandler<Size> instance;
TEST_ASSERT(instance.kvs.set("a", "b"));
TEST_ASSERT(instance.kvs.set("c", "d"));
TEST_ASSERT_EQUAL(2, instance.kvs.count());
TEST_ASSERT_FALSE(instance.kvs.set("e", "f"));
TEST_ASSERT(instance.kvs.del("a"));
TEST_ASSERT_EQUAL(1, instance.kvs.count());
TEST_ASSERT(instance.kvs.set("e", "f"));
TEST_ASSERT_EQUAL(2, instance.kvs.count());
check_kv(instance, "e", "f");
check_kv(instance, "c", "d");
}
};
void test_overflow() {
// slightly more that available, but we cannot fit the key
test_overflow_runner<16>();
// no more space
test_overflow_runner<12>();
}
void test_small_gaps() {
// ensure we can intemix empty and non-empty values
TestStorageHandler instance;
TEST_ASSERT(instance.kvs.set("key", "value"));
TEST_ASSERT(instance.kvs.set("empty", ""));
TEST_ASSERT(instance.kvs.set("empty_again", ""));
TEST_ASSERT(instance.kvs.set("finally", "avalue"));
auto check_empty = [&instance](const String& key) {
auto result = instance.kvs.get(key);
TEST_ASSERT(static_cast<bool>(result));
TEST_ASSERT_FALSE(result.value.length());
};
check_empty("empty_again");
check_empty("empty");
check_empty("empty_again");
check_empty("empty");
auto check_value = [&instance](const String& key, const String& value) {
auto result = instance.kvs.get(key);
TEST_ASSERT(static_cast<bool>(result));
TEST_ASSERT(result.value.length());
TEST_ASSERT_EQUAL_STRING(value.c_str(), result.value.c_str());
};
check_value("finally", "avalue");
check_value("key", "value");
}
void test_remove_randomized() {
// ensure we can remove keys in any order
// 8 seems like a good number to stop on, 9 will spend ~10seconds
// TODO: seems like a good start benchmarking read / write performance?
constexpr size_t KeysNumber = 8;
TestSequentialKvGenerator generator(TestSequentialKvGenerator::Mode::IncreasingLength);
auto kvs = generator.make(KeysNumber);
// generate indexes array to allow us to reference keys at random
TestStorageHandler instance;
std::array<size_t, KeysNumber> indexes;
std::iota(indexes.begin(), indexes.end(), 0);
// - insert keys sequentially
// - remove keys based on the order provided by next_permutation()
size_t index = 0;
do {
TEST_ASSERT(0 == instance.kvs.count());
for (auto& kv : kvs) {
TEST_ASSERT(instance.kvs.set(kv.first, kv.second));
}
for (auto index : indexes) {
auto key = kvs[index].first;
TEST_ASSERT(static_cast<bool>(instance.kvs.get(key)));
TEST_ASSERT(instance.kvs.del(key));
TEST_ASSERT_FALSE(static_cast<bool>(instance.kvs.get(key)));
}
index++;
} while (std::next_permutation(indexes.begin(), indexes.end()));
String message("- keys: ");
message += KeysNumber;
message += ", permutations: ";
message += index;
TEST_MESSAGE(message.c_str());
}
void test_basic() {
TestStorageHandler instance;
constexpr size_t KeysNumber = 5;
// ensure insert works
TestSequentialKvGenerator generator;
auto kvs = generator.make(KeysNumber);
for (auto& kv : kvs) {
instance.kvs.set(kv.first, kv.second);
}
// and we can retrieve keys back
for (auto& kv : kvs) {
auto result = instance.kvs.get(kv.first);
TEST_ASSERT(static_cast<bool>(result));
TEST_ASSERT_EQUAL_STRING(kv.second.c_str(), result.value.c_str());
}
}
void test_storage() {
constexpr size_t Size = 32;
StorageHandler<Size> instance;
// empty keys are invalid
TEST_ASSERT_FALSE(instance.kvs.set("", "value1"));
TEST_ASSERT_FALSE(instance.kvs.del(""));
// ...and both keys are not yet set
TEST_ASSERT_FALSE(instance.kvs.del("key1"));
TEST_ASSERT_FALSE(instance.kvs.del("key2"));
// some different ways to set keys
TEST_ASSERT(instance.kvs.set("key1", "value0"));
TEST_ASSERT_EQUAL(1, instance.kvs.count());
TEST_ASSERT(instance.kvs.set("key1", "value1"));
TEST_ASSERT_EQUAL(1, instance.kvs.count());
TEST_ASSERT(instance.kvs.set("key2", "value_old"));
TEST_ASSERT_EQUAL(2, instance.kvs.count());
TEST_ASSERT(instance.kvs.set("key2", "value2"));
TEST_ASSERT_EQUAL(2, instance.kvs.count());
auto kvsize = settings::embedis::estimate("key1", "value1");
TEST_ASSERT_EQUAL((Size - (2 * kvsize)), instance.kvs.available());
// checking keys one by one by using a separate kvs object,
// working on the same underlying data-store
using storage_type = decltype(instance)::storage_type;
using kvs_type = decltype(instance)::kvs_type;
// - ensure we can operate with storage offsets
// - test for internal length optimization that will overwrite the key in-place
// - make sure we did not break the storage above
// storage_type accepts reference to the blob, so we can seamlessly use the same
// underlying data storage and share it between kvs instances
{
kvs_type slice(storage_type(instance.blob), (Size - kvsize), Size);
TEST_ASSERT_EQUAL(1, slice.count());
TEST_ASSERT_EQUAL(kvsize, slice.size());
TEST_ASSERT_EQUAL(0, slice.available());
auto result = slice.get("key1");
TEST_ASSERT(static_cast<bool>(result));
TEST_ASSERT_EQUAL_STRING("value1", result.value.c_str());
}
// ensure that right offset also works
{
kvs_type slice(storage_type(instance.blob), 0, (Size - kvsize));
TEST_ASSERT_EQUAL(1, slice.count());
TEST_ASSERT_EQUAL((Size - kvsize), slice.size());
TEST_ASSERT_EQUAL((Size - kvsize - kvsize), slice.available());
auto result = slice.get("key2");
TEST_ASSERT(static_cast<bool>(result));
TEST_ASSERT_EQUAL_STRING("value2", result.value.c_str());
}
// ensure offset does not introduce offset bugs
// for instance, test in-place key overwrite by moving left boundary 2 bytes to the right
{
const auto available = instance.kvs.available();
const auto offset = 2;
TEST_ASSERT_GREATER_OR_EQUAL(offset, available);
kvs_type slice(storage_type(instance.blob), offset, Size);
TEST_ASSERT_EQUAL(2, slice.count());
auto key1 = slice.get("key1");
TEST_ASSERT(static_cast<bool>(key1));
String updated(key1.value);
for (size_t index = 0; index < key1.value.length(); ++index) {
updated[index] = 'A';
}
TEST_ASSERT(slice.set("key1", updated));
TEST_ASSERT(slice.set("key2", updated));
TEST_ASSERT_EQUAL(2, slice.count());
auto check_key1 = slice.get("key1");
TEST_ASSERT(static_cast<bool>(check_key1));
TEST_ASSERT_EQUAL_STRING(updated.c_str(), check_key1.value.c_str());
auto check_key2 = slice.get("key2");
TEST_ASSERT(static_cast<bool>(check_key2));
TEST_ASSERT_EQUAL_STRING(updated.c_str(), check_key2.value.c_str());
TEST_ASSERT_EQUAL(available - offset, slice.available());
}
}
void test_keys_iterator() {
constexpr size_t Size = 32;
StorageHandler<Size> instance;
TEST_ASSERT_EQUAL(Size, instance.kvs.available());
TEST_ASSERT_EQUAL(Size, instance.kvs.size());
TEST_ASSERT(instance.kvs.set("key", "value"));
TEST_ASSERT(instance.kvs.set("another", "thing"));
// ensure we get the same order of keys when iterating via foreach
std::vector<String> keys;
instance.kvs.foreach([&keys](decltype(instance)::kvs_type::KeyValueResult&& kv) {
keys.push_back(kv.key.read());
});
TEST_ASSERT(instance.kvs.keys() == keys);
TEST_ASSERT_EQUAL(2, keys.size());
TEST_ASSERT_EQUAL(2, instance.kvs.count());
TEST_ASSERT_EQUAL_STRING("key", keys[0].c_str());
TEST_ASSERT_EQUAL_STRING("another", keys[1].c_str());
}
int main(int argc, char** argv) {
UNITY_BEGIN();
RUN_TEST(test_storage);
RUN_TEST(test_keys_iterator);
RUN_TEST(test_basic);
RUN_TEST(test_remove_randomized);
RUN_TEST(test_small_gaps);
RUN_TEST(test_overflow);
RUN_TEST(test_perseverance);
RUN_TEST(test_longkey);
RUN_TEST(test_sizes);
return UNITY_END();
}