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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <shared/dumb_allocator.h>
#include <gtest/gtest.h>
static constexpr size_t kAllocSize = 128;
static constexpr size_t kSlotCount = 5;
typedef nanoapp_testing::DumbAllocator<kAllocSize, kSlotCount> DA;
static void ExpectGoodAlloc(const DA &da, const void *ptr) {
EXPECT_NE(nullptr, ptr);
EXPECT_TRUE(da.contains(ptr));
}
TEST(DumbAllocatorTests, SimpleAlloc) {
DA da;
void *ptr = da.alloc(kAllocSize);
ExpectGoodAlloc(da, ptr);
EXPECT_TRUE(da.free(ptr));
}
TEST(DumbAllocatorTests, AllocsAfterFree) {
DA da;
void *ptrs[kSlotCount];
for (size_t i = 0; i < kSlotCount; i++) {
ptrs[i] = da.alloc(kAllocSize);
ExpectGoodAlloc(da, ptrs[i]);
// Also confirm we're not doubly allocating the same pointer.
for (size_t j = 0; j < i; j++) {
EXPECT_NE(ptrs[j], ptrs[i]);
}
}
// Out of slots, allocation should fail.
EXPECT_EQ(nullptr, da.alloc(kAllocSize));
constexpr size_t kFreeIndex = kSlotCount / 2;
EXPECT_TRUE(da.free(ptrs[kFreeIndex]));
ptrs[kFreeIndex] = nullptr;
// Now our allocation should succeed.
void *newPtr = da.alloc(kAllocSize);
ExpectGoodAlloc(da, newPtr);
for (size_t i = 0; i < kSlotCount; i++) {
EXPECT_NE(newPtr, ptrs[i]);
}
}
TEST(DumbAllocatorTests, ContainsIsFalseForBadPtrs) {
DA da;
uint8_t *ptr = static_cast<uint8_t *>(da.alloc(kAllocSize));
ASSERT_NE(nullptr, ptr);
EXPECT_FALSE(da.contains(ptr - 1));
EXPECT_FALSE(da.contains(ptr + 1));
EXPECT_FALSE(da.contains(nullptr));
}
TEST(DumbAllocatorTests, FailLargeAllocations) {
DA da;
EXPECT_EQ(nullptr, da.alloc(kAllocSize + 1));
EXPECT_EQ(nullptr, da.alloc(kAllocSize * 2));
}
TEST(DumbAllocatorTests, SucceedSmallAllocations) {
DA da;
ExpectGoodAlloc(da, da.alloc(kAllocSize - 1));
ExpectGoodAlloc(da, da.alloc(1));
ExpectGoodAlloc(da, da.alloc(0));
}
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