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ArduinoJson/test/MemoryPool/allocString.cpp

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// ArduinoJson - arduinojson.org
// Copyright Benoit Blanchon 2014-2018
// MIT License
#include <ArduinoJson/Memory/MemoryPool.hpp>
#include <catch.hpp>
using namespace ARDUINOJSON_NAMESPACE;
TEST_CASE("MemoryPool::allocFrozenString()") {
const size_t poolCapacity = 64;
const size_t longestString = poolCapacity - sizeof(StringSlot);
char buffer[poolCapacity];
MemoryPool pool(buffer, poolCapacity);
SECTION("Returns different addresses") {
StringSlot *a = pool.allocFrozenString(1);
StringSlot *b = pool.allocFrozenString(1);
REQUIRE(a != b);
REQUIRE(a->value != b->value);
}
SECTION("Returns a StringSlot of the right size") {
StringSlot *s = pool.allocFrozenString(12);
REQUIRE(s->size == 12);
}
SECTION("Returns NULL when full") {
pool.allocFrozenString(longestString);
void *p = pool.allocFrozenString(1);
REQUIRE(0 == p);
}
SECTION("Returns NULL when pool is too small") {
void *p = pool.allocFrozenString(longestString + 1);
REQUIRE(0 == p);
}
SECTION("Returns NULL when buffer is NULL") {
MemoryPool pool2(0, poolCapacity);
REQUIRE(0 == pool2.allocFrozenString(2));
}
SECTION("Returns NULL when capacity is 0") {
MemoryPool pool2(buffer, 0);
REQUIRE(0 == pool2.allocFrozenString(2));
}
SECTION("Returns aligned pointers") {
REQUIRE(isAligned(pool.allocFrozenString(1)));
REQUIRE(isAligned(pool.allocFrozenString(1)));
}
SECTION("Returns same address after clear()") {
StringSlot *a = pool.allocFrozenString(1);
pool.clear();
StringSlot *b = pool.allocFrozenString(1);
REQUIRE(a == b);
REQUIRE(a->value == b->value);
}
SECTION("Can use full capacity when fresh") {
StringSlot *a = pool.allocFrozenString(longestString);
REQUIRE(a != 0);
}
SECTION("Can use full capacity after clear") {
pool.allocFrozenString(longestString);
pool.clear();
StringSlot *a = pool.allocFrozenString(longestString);
REQUIRE(a != 0);
}
}