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ArrayStorageTest.cpp
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154 lines (131 loc) · 5.34 KB
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "hermes/VM/ArrayStorage.h"
#include "TestHelpers.h"
using namespace hermes::vm;
namespace {
using ArrayStorageTest = RuntimeTestFixture;
TEST_F(ArrayStorageTest, ShiftTest) {
MutableHandle<ArrayStorage> st(runtime);
st = vmcast<ArrayStorage>(*ArrayStorage::create(runtime, 4));
// Resize to one element: "."
(void)ArrayStorage::resize(st, runtime, 1);
ASSERT_EQ(1u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(0));
st->setNonPtr(0, 1.0_hd, &runtime->getHeap());
// "1"
ASSERT_EQ(1.0_hd, st->at(0));
// Resize to two elements: "1."
(void)ArrayStorage::resize(st, runtime, 2);
ASSERT_EQ(2u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(1.0_hd, st->at(0));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(1));
// "12"
st->setNonPtr(1, 2.0_hd, &runtime->getHeap());
// Resize "12" to ".12."
(void)ArrayStorage::shift(st, runtime, 0, 1, 4);
ASSERT_EQ(4u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(0));
ASSERT_EQ(1.0_hd, st->at(1));
ASSERT_EQ(2.0_hd, st->at(2));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(3));
// Resize ".12." to "12"
(void)ArrayStorage::shift(st, runtime, 1, 0, 2);
ASSERT_EQ(2u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(1.0_hd, st->at(0));
ASSERT_EQ(2.0_hd, st->at(1));
// We want to check that resize() doesn't do more work than it has to, so we
// are checking that the element which remained outside of size is the same.
ASSERT_EQ(2.0_hd, st->data()[2]);
// Move it to the right again. "12" -> "...1".
(void)ArrayStorage::shift(st, runtime, 0, 3, 4);
ASSERT_EQ(4u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(0));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(1));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(2));
ASSERT_EQ(1.0_hd, st->at(3));
// "...1" -> "1..."
(void)ArrayStorage::shift(st, runtime, 3, 0, 4);
ASSERT_EQ(4u, st->size());
ASSERT_EQ(4u, st->capacity());
ASSERT_EQ(1.0_hd, st->at(0));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(1));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(2));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(3));
// "12.."
st->setNonPtr(1, 2.0_hd, &runtime->getHeap());
// Now let's do a reallocation. Resize to 6. "12.." -> "...12."
(void)ArrayStorage::shift(st, runtime, 0, 3, 6);
ASSERT_EQ(6u, st->size());
ASSERT_EQ(8u, st->capacity());
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(0));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(1));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(2));
ASSERT_EQ(1.0_hd, st->at(3));
ASSERT_EQ(2.0_hd, st->at(4));
ASSERT_EQ(HermesValue::encodeEmptyValue(), st->at(5));
}
TEST_F(ArrayStorageTest, PushBackTest) {
MutableHandle<ArrayStorage> st(runtime);
st = vmcast<ArrayStorage>(*ArrayStorage::create(runtime, 4));
(void)ArrayStorage::push_back(st, runtime, runtime->makeHandle(1.0_hd));
(void)ArrayStorage::push_back(st, runtime, runtime->makeHandle(2.0_hd));
(void)ArrayStorage::push_back(st, runtime, runtime->makeHandle(3.0_hd));
(void)ArrayStorage::push_back(st, runtime, runtime->makeHandle(4.0_hd));
(void)ArrayStorage::push_back(st, runtime, runtime->makeHandle(5.0_hd));
ASSERT_EQ(5u, st->size());
ASSERT_EQ(8u, st->capacity());
ASSERT_EQ(1.0_hd, st->at(0));
ASSERT_EQ(2.0_hd, st->at(1));
ASSERT_EQ(3.0_hd, st->at(2));
ASSERT_EQ(4.0_hd, st->at(3));
ASSERT_EQ(5.0_hd, st->at(4));
}
TEST_F(ArrayStorageTest, AllowTrimming) {
MutableHandle<ArrayStorage> st(runtime);
constexpr ArrayStorage::size_type originalCapacity = 8;
// Create an array and put in an element so its size is 1 and its capacity
// is 8.
st = vmcast<ArrayStorage>(*ArrayStorage::create(runtime, originalCapacity));
EXPECT_LE(st->capacity(), originalCapacity);
ASSERT_RETURNED(
ArrayStorage::push_back(st, runtime, runtime->makeHandle(0.0_hd)));
EXPECT_EQ(1, st->size());
// Now force some GCs to happen.
for (auto i = 0; i < 2; i++) {
runtime->collect("test");
}
// The array should be trimmed.
EXPECT_EQ(st->size(), st->capacity());
}
using ArrayStorageBigHeapTest = LargeHeapRuntimeTestFixture;
#ifdef HERMESVM_GC_NONCONTIG_GENERATIONAL
// The following test allocates gigantic arrays on non-NCGen GCs.
TEST_F(ArrayStorageBigHeapTest, AllocMaxSizeArray) {
// Should succeed, allocations up to maxElements are allowed.
auto res = ArrayStorage::create(runtime, ArrayStorage::maxElements());
EXPECT_EQ(res, ExecutionStatus::RETURNED)
<< "Allocating a max size array failed";
}
#endif
TEST_F(ArrayStorageBigHeapTest, AllocLargeArrayThrowsRangeError) {
// Should fail with a RangeError for allocations above the maxElements.
auto res = ArrayStorage::create(runtime, ArrayStorage::maxElements() + 1);
EXPECT_EQ(res, ExecutionStatus::EXCEPTION)
<< "Allocating an array slightly larger than its max size should throw";
HermesValue hv = runtime->getThrownValue();
EXPECT_EQ(
vmcast<JSObject>(hv)->getParent(runtime),
vmcast<JSObject>(runtime->RangeErrorPrototype))
<< "Exception thrown was not a RangeError";
}
} // namespace