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5f923cd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | // Copyright 2026 The ODML Authors.
//
// 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 "runtime/util/data_stream.h"
#include <filesystem> // NOLINT(build/c++17)
#include <memory>
#include <string>
#include <vector>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/status/status.h" // from @com_google_absl
#include "runtime/util/file_data_stream.h"
#include "runtime/util/test_utils.h" // IWYU pragma: keep
namespace litert::lm {
namespace {
using ::testing::HasSubstr;
using ::testing::status::StatusIs;
std::string GetTestModelPath() {
const auto model_path =
std::filesystem::path(::testing::SrcDir()) /
"litert_lm/runtime/testdata/test_lm.litertlm";
return model_path.string();
}
TEST(DataStreamTest, SubStreamReadAndPreserve) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
std::vector<char> buffer(8);
ASSERT_OK(sub_stream->ReadAndPreserve(buffer.data(), 0, 8));
std::string magic_number(buffer.data(), 8);
EXPECT_EQ(magic_number, "LITERTLM");
}
TEST(DataStreamTest, SubStreamReadAndDiscard) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
std::vector<char> buffer(8);
ASSERT_OK(sub_stream->ReadAndDiscard(buffer.data(), 0, 8));
std::string magic_number(buffer.data(), 8);
EXPECT_EQ(magic_number, "LITERTLM");
}
TEST(DataStreamTest, SubStreamReadOutOfBounds) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
std::vector<char> buffer(9);
absl::Status status = sub_stream->ReadAndPreserve(buffer.data(), 8, 1);
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
status = sub_stream->ReadAndPreserve(buffer.data(), 0, 9);
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
}
TEST(DataStreamTest, SubStreamDiscard) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
ASSERT_OK(sub_stream->Discard(0, 8));
}
TEST(DataStreamTest, SubStreamDiscardOutOfBounds) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
absl::Status status = sub_stream->Discard(8, 1);
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
status = sub_stream->Discard(0, 9);
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
}
TEST(DataStreamTest, SubStreamOfSubStream) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
ASSERT_OK_AND_ASSIGN(auto sub_sub_stream, sub_stream->OpenSubStream(1, 7));
std::vector<char> buffer(7);
ASSERT_OK(sub_sub_stream->ReadAndPreserve(buffer.data(), 0, 7));
std::string magic_number(buffer.data(), 7);
EXPECT_EQ(magic_number, "ITERTLM");
}
TEST(DataStreamTest, SubStreamReadAfterParentDestroyed) {
std::shared_ptr<DataStream> sub_stream;
{
ASSERT_OK_AND_ASSIGN(auto stream,
FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(sub_stream, stream->OpenSubStream(0, 8));
}
std::vector<char> buffer(1);
absl::Status status = sub_stream->ReadAndPreserve(buffer.data(), 0, 1);
EXPECT_EQ(status.code(), absl::StatusCode::kFailedPrecondition);
EXPECT_THAT(status.message(), HasSubstr("Parent stream is expired"));
}
TEST(DataStreamTest, SubStreamCannotOverlap) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream1, stream->OpenSubStream(0, 10));
absl::Status status = stream->OpenSubStream(5, 10).status();
EXPECT_EQ(status.code(), absl::StatusCode::kAlreadyExists);
EXPECT_THAT(status.message(),
HasSubstr("overlaps with an existing locked region"));
status = stream->OpenSubStream(0, 1).status();
EXPECT_EQ(status.code(), absl::StatusCode::kAlreadyExists);
EXPECT_THAT(status.message(),
HasSubstr("overlaps with an existing locked region"));
status = stream->OpenSubStream(9, 10).status();
EXPECT_EQ(status.code(), absl::StatusCode::kAlreadyExists);
EXPECT_THAT(status.message(),
HasSubstr("overlaps with an existing locked region"));
// Non-overlapping should succeed.
ASSERT_OK(stream->OpenSubStream(10, 10));
}
TEST(DataStreamTest, SubStreamCannotBeCreatedAfterPreviousIsDestroyed) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
{
ASSERT_OK_AND_ASSIGN(auto sub_stream1, stream->OpenSubStream(0, 10));
EXPECT_THAT(stream->OpenSubStream(0, 10),
StatusIs(absl::StatusCode::kAlreadyExists));
}
// Even though sub_stream1 is out of scope, we should not be able to create a
// new stream on the same region.
EXPECT_THAT(stream->OpenSubStream(0, 10),
StatusIs(absl::StatusCode::kAlreadyExists));
}
TEST(DataStreamTest, SubStreamOfSubStreamOutOfBounds) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 8));
absl::Status status = sub_stream->OpenSubStream(0, 9).status();
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
status = sub_stream->OpenSubStream(1, 8).status();
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
status = sub_stream->OpenSubStream(8, 1).status();
EXPECT_EQ(status.code(), absl::StatusCode::kOutOfRange);
EXPECT_THAT(status.message(), HasSubstr("Exceeded bounds of substream"));
}
TEST(DataStreamTest, SubSubStreamCannotOverlap) {
ASSERT_OK_AND_ASSIGN(auto stream, FileDataStream::Create(GetTestModelPath()));
ASSERT_OK_AND_ASSIGN(auto sub_stream, stream->OpenSubStream(0, 100));
ASSERT_OK(sub_stream->OpenSubStream(10, 20));
absl::Status status = sub_stream->OpenSubStream(15, 20).status();
EXPECT_EQ(status.code(), absl::StatusCode::kAlreadyExists);
EXPECT_THAT(status.message(),
HasSubstr("overlaps with an existing locked region"));
status = sub_stream->OpenSubStream(0, 11).status();
EXPECT_EQ(status.code(), absl::StatusCode::kAlreadyExists);
EXPECT_THAT(status.message(),
HasSubstr("overlaps with an existing locked region"));
// Non-overlapping should succeed.
ASSERT_OK(sub_stream->OpenSubStream(30, 10));
}
} // namespace
} // namespace litert::lm
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