zircon/system/ulib/fvm/test/slice-entry-test.cpp

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <cstdint>

#include <fvm/format.h>

#include <zxtest/zxtest.h>

namespace fvm {
namespace {

constexpr uint64_t kVPartition = 15;
constexpr uint64_t kVSlice = 25;

TEST(SliceEntryTest, DefaultsToUnallocatedAndZeroed) {
    SliceEntry entry = SliceEntry::Create();
    ASSERT_FALSE(entry.IsAllocated());
    ASSERT_TRUE(entry.IsFree());
    ASSERT_EQ(entry.VPartition(), 0);
    ASSERT_EQ(entry.VSlice(), 0);
}

TEST(SliceEntryTest, CreateAllocatesAndSetsVSliceAndVPartition) {
    SliceEntry entry = SliceEntry::Create(kVPartition, kVSlice);
    EXPECT_TRUE(entry.IsAllocated());
    EXPECT_FALSE(entry.IsFree());
    EXPECT_EQ(entry.VPartition(), kVPartition);
    EXPECT_EQ(entry.VSlice(), kVSlice);
}

TEST(SliceEntryTest, SetAllocatesAndSetsVSliceAndVPartition) {
    SliceEntry entry = SliceEntry::Create();
    ASSERT_TRUE(entry.IsFree());
    ASSERT_EQ(entry.VPartition(), 0);
    ASSERT_EQ(entry.VSlice(), 0);

    entry.Set(kVPartition, kVSlice);

    EXPECT_TRUE(entry.IsAllocated());
    EXPECT_FALSE(entry.IsFree());
    EXPECT_EQ(entry.VPartition(), kVPartition);
    EXPECT_EQ(entry.VSlice(), kVSlice);
}

TEST(SliceEntryTest, ReleaseZeroesAndDeallocates) {
    SliceEntry entry = SliceEntry::Create(kVPartition, kVSlice);

    entry.Release();

    ASSERT_FALSE(entry.IsAllocated());
    ASSERT_TRUE(entry.IsFree());
    ASSERT_EQ(entry.VPartition(), 0);
    ASSERT_EQ(entry.VSlice(), 0);
}

} // namespace
} // namespace fvm