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libraries/ArduinoJson/extras/tests/JsonDeserializer/string.cpp
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214
libraries/ArduinoJson/extras/tests/JsonDeserializer/string.cpp
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// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2025, Benoit BLANCHON
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// MIT License
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#define ARDUINOJSON_DECODE_UNICODE 1
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#include <ArduinoJson.h>
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#include <catch.hpp>
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#include "Allocators.hpp"
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using ArduinoJson::detail::sizeofArray;
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using ArduinoJson::detail::sizeofObject;
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TEST_CASE("Valid JSON strings value") {
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struct TestCase {
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const char* input;
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const char* expectedOutput;
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};
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TestCase testCases[] = {
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{"\"hello world\"", "hello world"},
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{"\'hello world\'", "hello world"},
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{"'\"'", "\""},
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{"'\\\\'", "\\"},
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{"'\\/'", "/"},
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{"'\\b'", "\b"},
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{"'\\f'", "\f"},
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{"'\\n'", "\n"},
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{"'\\r'", "\r"},
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{"'\\t'", "\t"},
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{"\"1\\\"2\\\\3\\/4\\b5\\f6\\n7\\r8\\t9\"", "1\"2\\3/4\b5\f6\n7\r8\t9"},
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{"'\\u0041'", "A"},
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{"'\\u00e4'", "\xc3\xa4"}, // ä
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{"'\\u00E4'", "\xc3\xa4"}, // ä
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{"'\\u3042'", "\xe3\x81\x82"}, // あ
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{"'\\ud83d\\udda4'", "\xf0\x9f\x96\xa4"}, // 🖤
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{"'\\uF053'", "\xef\x81\x93"}, // issue #1173
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{"'\\uF015'", "\xef\x80\x95"}, // issue #1173
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{"'\\uF054'", "\xef\x81\x94"}, // issue #1173
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};
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const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
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JsonDocument doc;
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for (size_t i = 0; i < testCount; i++) {
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const TestCase& testCase = testCases[i];
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CAPTURE(testCase.input);
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DeserializationError err = deserializeJson(doc, testCase.input);
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CHECK(err == DeserializationError::Ok);
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CHECK(doc.as<std::string>() == testCase.expectedOutput);
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}
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}
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TEST_CASE("\\u0000") {
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JsonDocument doc;
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DeserializationError err = deserializeJson(doc, "\"wx\\u0000yz\"");
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REQUIRE(err == DeserializationError::Ok);
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const char* result = doc.as<const char*>();
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CHECK(result[0] == 'w');
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CHECK(result[1] == 'x');
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CHECK(result[2] == 0);
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CHECK(result[3] == 'y');
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CHECK(result[4] == 'z');
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CHECK(result[5] == 0);
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CHECK(doc.as<JsonString>().size() == 5);
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CHECK(doc.as<std::string>().size() == 5);
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}
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TEST_CASE("Truncated JSON string") {
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const char* testCases[] = {"\"hello", "\'hello", "'\\u", "'\\u00", "'\\u000"};
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const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
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JsonDocument doc;
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for (size_t i = 0; i < testCount; i++) {
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const char* input = testCases[i];
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CAPTURE(input);
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REQUIRE(deserializeJson(doc, input) ==
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DeserializationError::IncompleteInput);
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}
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}
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TEST_CASE("Escape single quote in single quoted string") {
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JsonDocument doc;
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DeserializationError err = deserializeJson(doc, "'ab\\\'cd'");
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REQUIRE(err == DeserializationError::Ok);
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CHECK(doc.as<std::string>() == "ab\'cd");
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}
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TEST_CASE("Escape double quote in double quoted string") {
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JsonDocument doc;
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DeserializationError err = deserializeJson(doc, "'ab\\\"cd'");
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REQUIRE(err == DeserializationError::Ok);
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CHECK(doc.as<std::string>() == "ab\"cd");
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}
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TEST_CASE("Invalid JSON string") {
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const char* testCases[] = {"'\\u'", "'\\u000g'", "'\\u000'",
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"'\\u000G'", "'\\u000/'", "'\\x1234'"};
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const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
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JsonDocument doc;
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for (size_t i = 0; i < testCount; i++) {
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const char* input = testCases[i];
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CAPTURE(input);
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REQUIRE(deserializeJson(doc, input) == DeserializationError::InvalidInput);
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}
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}
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TEST_CASE("Allocation of the key fails") {
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TimebombAllocator timebomb(0);
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SpyingAllocator spy(&timebomb);
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JsonDocument doc(&spy);
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SECTION("Quoted string, first member") {
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REQUIRE(deserializeJson(doc, "{\"example\":1}") ==
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DeserializationError::NoMemory);
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REQUIRE(spy.log() == AllocatorLog{
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AllocateFail(sizeofStringBuffer()),
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});
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}
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SECTION("Quoted string, second member") {
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timebomb.setCountdown(3);
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REQUIRE(deserializeJson(doc, "{\"hello\":1,\"world\"}") ==
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DeserializationError::NoMemory);
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REQUIRE(spy.log() ==
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AllocatorLog{
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Allocate(sizeofStringBuffer()),
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Allocate(sizeofPool()),
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Reallocate(sizeofStringBuffer(), sizeofString("hello")),
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AllocateFail(sizeofStringBuffer()),
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ReallocateFail(sizeofPool(), sizeofObject(1)),
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});
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}
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SECTION("Non-Quoted string, first member") {
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REQUIRE(deserializeJson(doc, "{example:1}") ==
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DeserializationError::NoMemory);
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REQUIRE(spy.log() == AllocatorLog{
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AllocateFail(sizeofStringBuffer()),
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});
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}
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SECTION("Non-Quoted string, second member") {
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timebomb.setCountdown(3);
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REQUIRE(deserializeJson(doc, "{hello:1,world}") ==
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DeserializationError::NoMemory);
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REQUIRE(spy.log() ==
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AllocatorLog{
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Allocate(sizeofStringBuffer()),
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Allocate(sizeofPool()),
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Reallocate(sizeofStringBuffer(), sizeofString("hello")),
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AllocateFail(sizeofStringBuffer()),
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ReallocateFail(sizeofPool(), sizeofObject(1)),
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});
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}
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}
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TEST_CASE("String allocation fails") {
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SpyingAllocator spy(FailingAllocator::instance());
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JsonDocument doc(&spy);
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SECTION("Input is const char*") {
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REQUIRE(deserializeJson(doc, "\"hello\"") ==
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DeserializationError::NoMemory);
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REQUIRE(spy.log() == AllocatorLog{
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AllocateFail(sizeofStringBuffer()),
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});
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}
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}
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TEST_CASE("Deduplicate values") {
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SpyingAllocator spy;
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JsonDocument doc(&spy);
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deserializeJson(doc, "[\"example\",\"example\"]");
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CHECK(doc[0].as<const char*>() == doc[1].as<const char*>());
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REQUIRE(spy.log() ==
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AllocatorLog{
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Allocate(sizeofPool()),
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Allocate(sizeofStringBuffer()),
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Reallocate(sizeofStringBuffer(), sizeofString("example")),
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Allocate(sizeofStringBuffer()),
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Deallocate(sizeofStringBuffer()),
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Reallocate(sizeofPool(), sizeofArray(2)),
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});
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}
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TEST_CASE("Deduplicate keys") {
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SpyingAllocator spy;
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JsonDocument doc(&spy);
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deserializeJson(doc, "[{\"example\":1},{\"example\":2}]");
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const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
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const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
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CHECK(key1 == key2);
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REQUIRE(spy.log() ==
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AllocatorLog{
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Allocate(sizeofPool()),
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Allocate(sizeofStringBuffer()),
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Reallocate(sizeofStringBuffer(), sizeofString("example")),
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Allocate(sizeofStringBuffer()),
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Deallocate(sizeofStringBuffer()),
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Reallocate(sizeofPool(), sizeofArray(2) + 2 * sizeofObject(1)),
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});
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}
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