103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
// Copyright 2021 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_snapshot/uuid.h"
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#include <array>
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#include <span>
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#include "gtest/gtest.h"
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#include "pw_bytes/span.h"
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#include "pw_protobuf/encoder.h"
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#include "pw_result/result.h"
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#include "pw_snapshot_metadata_proto/snapshot_metadata.pwpb.h"
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#include "pw_status/status.h"
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namespace pw::snapshot {
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namespace {
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ConstByteSpan EncodeSnapshotWithUuid(ConstByteSpan uuid, ByteSpan dest) {
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SnapshotBasicInfo::MemoryEncoder snapshot_encoder(dest);
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{
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Metadata::StreamEncoder metadata_encoder =
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snapshot_encoder.GetMetadataEncoder();
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EXPECT_EQ(OkStatus(), metadata_encoder.WriteSnapshotUuid(uuid));
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}
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EXPECT_EQ(OkStatus(), snapshot_encoder.status());
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return snapshot_encoder;
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}
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TEST(ReadUuid, ReadUuid) {
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const std::array<uint8_t, 8> kExpectedUuid = {
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0x1F, 0x8F, 0xBF, 0xC4, 0x86, 0x0E, 0xED, 0xD4};
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std::array<std::byte, 16> snapshot_buffer;
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ConstByteSpan snapshot = EncodeSnapshotWithUuid(
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std::as_bytes(std::span(kExpectedUuid)), snapshot_buffer);
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std::array<std::byte, kUuidSizeBytes> uuid_dest;
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Result<ConstByteSpan> result = ReadUuidFromSnapshot(snapshot, uuid_dest);
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EXPECT_EQ(OkStatus(), result.status());
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EXPECT_EQ(kExpectedUuid.size(), result->size());
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EXPECT_EQ(0, memcmp(result->data(), kExpectedUuid.data(), result->size()));
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}
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TEST(ReadUuid, NoUuid) {
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std::array<std::byte, 16> snapshot_buffer;
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// Write some snapshot metadata, but no UUID.
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SnapshotBasicInfo::MemoryEncoder snapshot_encoder(snapshot_buffer);
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{
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Metadata::StreamEncoder metadata_encoder =
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snapshot_encoder.GetMetadataEncoder();
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EXPECT_EQ(OkStatus(), metadata_encoder.WriteFatal(true));
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}
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EXPECT_EQ(OkStatus(), snapshot_encoder.status());
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ConstByteSpan snapshot(snapshot_encoder);
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std::array<std::byte, kUuidSizeBytes> uuid_dest;
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Result<ConstByteSpan> result = ReadUuidFromSnapshot(snapshot, uuid_dest);
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EXPECT_EQ(Status::NotFound(), result.status());
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}
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TEST(ReadUuid, UndersizedBuffer) {
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const std::array<uint8_t, 17> kExpectedUuid = {0xF4,
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0x1B,
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0xE1,
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0x2D,
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0x10,
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0x9B,
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0xB2,
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0x1A,
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0x88,
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0xE0,
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0xC4,
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0x77,
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0xCA,
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0x18,
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0x83,
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0xB5,
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0xBB};
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std::array<std::byte, 32> snapshot_buffer;
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ConstByteSpan snapshot = EncodeSnapshotWithUuid(
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std::as_bytes(std::span(kExpectedUuid)), snapshot_buffer);
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std::array<std::byte, kUuidSizeBytes> uuid_dest;
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Result<ConstByteSpan> result = ReadUuidFromSnapshot(snapshot, uuid_dest);
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EXPECT_EQ(Status::ResourceExhausted(), result.status());
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}
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} // namespace
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} // namespace pw::snapshot
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