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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/zucchini/zucchini_gen.h"
#include <stdint.h>
#include <deque>
#include <utility>
#include <vector>
#include "components/zucchini/equivalence_map.h"
#include "components/zucchini/image_index.h"
#include "components/zucchini/image_utils.h"
#include "components/zucchini/test_disassembler.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace zucchini {
namespace {
using OffsetVector = std::vector<offset_t>;
// In normal usage, 0.0 is an unrealistic similarity value for an
// EquivalenceCandiate. Since similarity doesn't affect results for various unit
// tests in this file, we use this dummy value for simplicity.
constexpr double kDummySim = 0.0;
// Helper function wrapping GenerateReferencesDelta().
std::vector<int32_t> GenerateReferencesDeltaTest(
std::vector<Reference>&& old_references,
std::vector<Reference>&& new_references,
std::deque<offset_t>&& exp_old_targets,
std::deque<offset_t>&& exp_projected_old_targets,
EquivalenceMap&& equivalence_map) {
// OffsetMapper needs image sizes for forward-projection overflow check. These
// are tested elsewhere, so just use arbitrary large value.
constexpr offset_t kOldImageSize = 1000000;
constexpr offset_t kNewImageSize = 1001000;
ReferenceDeltaSink reference_delta_sink;
TargetPool old_targets;
old_targets.InsertTargets(old_references);
ReferenceSet old_refs({1, TypeTag(0), PoolTag(0)}, old_targets);
old_refs.InitReferences(old_references);
EXPECT_EQ(exp_old_targets, old_targets.targets());
TargetPool new_targets;
new_targets.InsertTargets(new_references);
ReferenceSet new_refs({1, TypeTag(0), PoolTag(0)}, new_targets);
new_refs.InitReferences(new_references);
OffsetMapper offset_mapper(equivalence_map, kOldImageSize, kNewImageSize);
TargetPool projected_old_targets = old_targets;
projected_old_targets.FilterAndProject(offset_mapper);
std::vector<offset_t> extra_target =
FindExtraTargets(projected_old_targets, new_targets);
projected_old_targets.InsertTargets(extra_target);
EXPECT_EQ(exp_projected_old_targets, projected_old_targets.targets());
GenerateReferencesDelta(old_refs, new_refs, projected_old_targets,
offset_mapper, equivalence_map,
&reference_delta_sink);
// Serialize |reference_delta_sink| to patch format, and read it back as
// std::vector<int32_t>.
std::vector<uint8_t> buffer(reference_delta_sink.SerializedSize());
BufferSink sink(buffer.data(), buffer.size());
reference_delta_sink.SerializeInto(&sink);
BufferSource source(buffer.data(), buffer.size());
ReferenceDeltaSource reference_delta_source;
EXPECT_TRUE(reference_delta_source.Initialize(&source));
std::vector<int32_t> delta_vec;
for (auto delta = reference_delta_source.GetNext(); delta.has_value();
delta = reference_delta_source.GetNext()) {
delta_vec.push_back(*delta);
}
EXPECT_TRUE(reference_delta_source.Done());
return delta_vec;
}
} // namespace
TEST(ZucchiniGenTest, FindExtraTargets) {
EXPECT_EQ(OffsetVector(), FindExtraTargets({}, {}));
EXPECT_EQ(OffsetVector(), FindExtraTargets(TargetPool({3}), {}));
EXPECT_EQ(OffsetVector(), FindExtraTargets(TargetPool({3}), TargetPool({3})));
EXPECT_EQ(OffsetVector({4}),
FindExtraTargets(TargetPool({3}), TargetPool({4})));
EXPECT_EQ(OffsetVector({4}),
FindExtraTargets(TargetPool({3}), TargetPool({3, 4})));
EXPECT_EQ(OffsetVector({4}),
FindExtraTargets(TargetPool({2, 3}), TargetPool({3, 4})));
EXPECT_EQ(OffsetVector({3, 5}),
FindExtraTargets(TargetPool({2, 4}), TargetPool({3, 5})));
}
TEST(ZucchiniGenTest, GenerateReferencesDelta) {
// No equivalences.
EXPECT_EQ(std::vector<int32_t>(),
GenerateReferencesDeltaTest({}, {}, {}, {}, EquivalenceMap()));
EXPECT_EQ(std::vector<int32_t>(),
GenerateReferencesDeltaTest({{10, 0}}, {{20, 0}}, {0}, {0},
EquivalenceMap()));
// Simple cases with one equivalence.
EXPECT_EQ(
std::vector<int32_t>({0}), // {0 - 0}.
GenerateReferencesDeltaTest(
{{10, 3}}, {{20, 3}}, {3}, {3},
EquivalenceMap({{{3, 3, 1}, kDummySim}, {{10, 20, 4}, kDummySim}})));
EXPECT_EQ(
std::vector<int32_t>({-1}), // {0 - 1}.
GenerateReferencesDeltaTest(
{{10, 3}}, {{20, 3}}, {3}, {3, 4},
EquivalenceMap({{{3, 4, 1}, kDummySim}, {{10, 20, 4}, kDummySim}})));
EXPECT_EQ(
std::vector<int32_t>({1}), // {1 - 0}.
GenerateReferencesDeltaTest(
{{10, 3}}, {{20, 3}}, {3}, {2, 3},
EquivalenceMap({{{3, 2, 1}, kDummySim}, {{10, 20, 4}, kDummySim}})));
EXPECT_EQ(std::vector<int32_t>({1, -1}), // {1 - 0, 0 - 1}.
GenerateReferencesDeltaTest(
{{10, 3}, {11, 4}}, {{20, 3}, {21, 4}}, {3, 4}, {2, 3, 4, 5},
EquivalenceMap({{{3, 2, 1}, kDummySim},
{{4, 5, 1}, kDummySim},
{{10, 20, 4}, kDummySim}})));
EXPECT_EQ(
std::vector<int32_t>({0, 0}), // {1 - 1, 2 - 2}.
GenerateReferencesDeltaTest(
{{10, 3}, {11, 4}, {12, 5}, {13, 6}},
{{20, 3}, {21, 4}, {22, 5}, {23, 6}}, {3, 4, 5, 6}, {3, 4, 5, 6},
EquivalenceMap({{{3, 3, 4}, kDummySim}, {{11, 21, 2}, kDummySim}})));
// Multiple equivalences.
EXPECT_EQ(std::vector<int32_t>({-1, 1}), // {0 - 1, 1 - 0}.
GenerateReferencesDeltaTest(
{{10, 0}, {12, 1}}, {{10, 0}, {12, 1}}, {0, 1}, {0, 1},
EquivalenceMap({{{0, 0, 2}, kDummySim},
{{12, 10, 2}, kDummySim},
{{10, 12, 2}, kDummySim}})));
EXPECT_EQ(
std::vector<int32_t>({0, 0}), // {0 - 0, 1 - 1}.
GenerateReferencesDeltaTest(
{{0, 0}, {2, 2}}, {{0, 0}, {2, 2}}, {0, 2}, {0, 2},
EquivalenceMap({{{2, 0, 2}, kDummySim}, {{0, 2, 2}, kDummySim}})));
EXPECT_EQ(std::vector<int32_t>({-2, 2}), // {0 - 2, 2 - 0}.
GenerateReferencesDeltaTest(
{{10, 0}, {12, 1}, {14, 2}}, {{10, 0}, {12, 1}, {14, 2}},
{0, 1, 2}, {0, 1, 2},
EquivalenceMap({{{0, 0, 3}, kDummySim},
{{14, 10, 2}, kDummySim},
{{10, 14, 2}, kDummySim}})));
EXPECT_EQ(std::vector<int32_t>({-2, 2}), // {0 - 2, 2 - 0}.
GenerateReferencesDeltaTest(
{{11, 0}, {14, 1}, {17, 2}}, {{11, 0}, {14, 1}, {17, 2}},
{0, 1, 2}, {0, 1, 2},
EquivalenceMap({{{0, 0, 3}, kDummySim},
{{16, 10, 3}, kDummySim},
{{10, 16, 3}, kDummySim}})));
EXPECT_EQ(
std::vector<int32_t>({-2, 2}), // {0 - 2, 2 - 0}.
GenerateReferencesDeltaTest({{10, 0}, {14, 2}, {16, 1}},
{{10, 0}, {14, 2}}, {0, 1, 2}, {0, 1, 2},
EquivalenceMap({{{0, 0, 3}, kDummySim},
{{14, 10, 2}, kDummySim},
{{12, 12, 2}, kDummySim},
{{10, 14, 2}, kDummySim}})));
}
// TODO(huangs): Add more tests.
} // namespace zucchini
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