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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <cmath>
#include <limits>
#include "mongo/db/exec/sbe/expression_test_base.h"
#include "mongo/db/exec/sbe/values/bson.h"
namespace mongo::sbe {
class SBEBuiltinGetElementTest : public EExpressionTestFixture {
protected:
using TypedValue = std::pair<value::TypeTags, value::Value>;
struct TestCase {
BSONArray array;
TypedValue index;
TypedValue expected;
};
void setUp() override {
decimalValue = value::makeCopyDecimal(Decimal128("1.2345"));
testCases = {
// Positive indexes.
{BSON_ARRAY(1 << 2 << 3), makeInt32(0), makeInt32(1)},
{BSON_ARRAY(1 << 2 << 3), makeInt32(1), makeInt32(2)},
{BSON_ARRAY(1 << 2 << 3), makeInt32(2), makeInt32(3)},
// Negative indexes.
{BSON_ARRAY(1 << 2 << 3), makeInt32(-1), makeInt32(3)},
{BSON_ARRAY(1 << 2 << 3), makeInt32(-2), makeInt32(2)},
{BSON_ARRAY(1 << 2 << 3), makeInt32(-3), makeInt32(1)},
// Index out of bounds.
{BSON_ARRAY(1 << 2), makeInt32(2), makeNothing()},
{BSON_ARRAY(1 << 2), makeInt32(-3), makeNothing()},
{BSONArray(), makeInt32(0), makeNothing()},
{BSONArray(), makeInt32(-1), makeNothing()},
// Invalid index type.
{BSON_ARRAY(1 << 2), makeNothing(), makeNothing()},
{BSON_ARRAY(1 << 2), decimalValue, makeNothing()},
{BSON_ARRAY(1 << 2), makeDouble(1.2345), makeNothing()},
{BSON_ARRAY(1 << 2), makeInt64(0), makeNothing()},
};
}
void tearDown() override {
value::releaseValue(decimalValue.first, decimalValue.second);
}
/**
* Compile and run expression 'getElement(array, index)' and return its result.
* NOTE: Values behind arguments and the return value of this function are owned by the caller.
*/
TypedValue runExpression(TypedValue array, TypedValue index) {
// We do not copy array value on purpose. During the copy, order of elements in ArraySet
// may change. 'getElement' return value depends on the order of elements in the input
// array. After copy 'getElement' may return different element from the expected by the
// caller.
value::ViewOfValueAccessor arraySlotAccessor;
auto arraySlot = bindAccessor(&arraySlotAccessor);
arraySlotAccessor.reset(array.first, array.second);
auto arrayExpr = makeE<EVariable>(arraySlot);
auto indexCopy = value::copyValue(index.first, index.second);
auto indexExpr = makeE<EConstant>(indexCopy.first, indexCopy.second);
auto getElementExpr =
makeE<EFunction>("getElement", makeEs(std::move(arrayExpr), std::move(indexExpr)));
auto compiledExpr = compileExpression(*getElementExpr);
return runCompiledExpression(compiledExpr.get());
}
/**
* Assert that result of 'getElement(array, index)' is equal to 'expectedRes'.
*/
void runAndAssertExpression(TypedValue array, TypedValue index, TypedValue expectedRes) {
auto actualValue = runExpression(array, index);
value::ValueGuard guard{actualValue};
auto [compareTag, compareValue] = value::compareValue(
actualValue.first, actualValue.second, expectedRes.first, expectedRes.second);
ASSERT_EQ(compareTag, value::TypeTags::NumberInt32);
ASSERT_EQ(compareValue, 0);
}
TypedValue decimalValue;
std::vector<TestCase> testCases;
};
TEST_F(SBEBuiltinGetElementTest, GetElementBSONArray) {
for (const auto& testCase : testCases) {
auto bsonArray = makeBsonArray(testCase.array);
value::ValueGuard guard{bsonArray};
runAndAssertExpression(bsonArray, testCase.index, testCase.expected);
}
}
TEST_F(SBEBuiltinGetElementTest, GetElementArray) {
for (const auto& testCase : testCases) {
auto array = makeArray(testCase.array);
value::ValueGuard guard{array};
runAndAssertExpression(array, testCase.index, testCase.expected);
}
}
TEST_F(SBEBuiltinGetElementTest, GetElementArraySetNothing) {
// Run test cases when 'getElement' returns Nothing.
for (const auto& testCase : testCases) {
if (testCase.expected.first != value::TypeTags::Nothing) {
continue;
}
auto array = makeArraySet(testCase.array);
value::ValueGuard guard{array};
runAndAssertExpression(array, testCase.index, testCase.expected);
}
}
TEST_F(SBEBuiltinGetElementTest, GetElementArraySetElements) {
auto array = makeArraySet(BSON_ARRAY(1 << 2 << 3));
value::ValueGuard guard{array};
const std::vector<std::pair<int32_t, int32_t>> indices = {{-3, -1}, {0, 2}};
for (const auto& [begin, end] : indices) {
std::vector<int32_t> elements;
for (int32_t i = begin; i <= end; ++i) {
auto result = runExpression(array, makeInt32(i));
value::ValueGuard guard{result};
ASSERT_EQ(result.first, value::TypeTags::NumberInt32);
elements.push_back(value::bitcastTo<int32_t>(result.second));
}
std::sort(elements.begin(), elements.end());
ASSERT_EQ(elements[0], 1);
ASSERT_EQ(elements[1], 2);
ASSERT_EQ(elements[2], 3);
}
}
TEST_F(SBEBuiltinGetElementTest, GetElementNotArray) {
runAndAssertExpression(makeNothing(), makeInt32(1), makeNothing());
runAndAssertExpression(makeInt32(123), makeInt32(1), makeNothing());
}
} // namespace mongo::sbe
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