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Diffstat (limited to 'equivalence_map_unittest.cc')
| -rw-r--r-- | equivalence_map_unittest.cc | 635 |
1 files changed, 635 insertions, 0 deletions
diff --git a/equivalence_map_unittest.cc b/equivalence_map_unittest.cc new file mode 100644 index 0000000..b3a4ea4 --- /dev/null +++ b/equivalence_map_unittest.cc @@ -0,0 +1,635 @@ +// Copyright 2017 The Chromium 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 "components/zucchini/equivalence_map.h" + +#include <cstring> +#include <deque> +#include <map> +#include <string> +#include <utility> +#include <vector> + +#include "components/zucchini/encoded_view.h" +#include "components/zucchini/image_index.h" +#include "components/zucchini/suffix_array.h" +#include "components/zucchini/targets_affinity.h" +#include "components/zucchini/test_disassembler.h" +#include "testing/gtest/include/gtest/gtest.h" + +namespace zucchini { + +namespace { + +using OffsetVector = std::vector<offset_t>; + +// Make all references 2 bytes long. +constexpr offset_t kReferenceSize = 2; + +// Creates and initialize an ImageIndex from |a| and with 2 types of references. +// The result is populated with |refs0| and |refs1|. |a| is expected to be a +// string literal valid for the lifetime of the object. +ImageIndex MakeImageIndexForTesting(const char* a, + std::vector<Reference>&& refs0, + std::vector<Reference>&& refs1) { + TestDisassembler disasm( + {kReferenceSize, TypeTag(0), PoolTag(0)}, std::move(refs0), + {kReferenceSize, TypeTag(1), PoolTag(0)}, std::move(refs1), + {kReferenceSize, TypeTag(2), PoolTag(1)}, {}); + + ImageIndex image_index( + ConstBufferView(reinterpret_cast<const uint8_t*>(a), std::strlen(a))); + + EXPECT_TRUE(image_index.Initialize(&disasm)); + return image_index; +} + +std::vector<TargetsAffinity> MakeTargetsAffinitiesForTesting( + const ImageIndex& old_image_index, + const ImageIndex& new_image_index, + const EquivalenceMap& equivalence_map) { + std::vector<TargetsAffinity> target_affinities(old_image_index.PoolCount()); + for (const auto& old_pool_tag_and_targets : old_image_index.target_pools()) { + PoolTag pool_tag = old_pool_tag_and_targets.first; + target_affinities[pool_tag.value()].InferFromSimilarities( + equivalence_map, old_pool_tag_and_targets.second.targets(), + new_image_index.pool(pool_tag).targets()); + } + return target_affinities; +} + +} // namespace + +TEST(EquivalenceMapTest, GetTokenSimilarity) { + ImageIndex old_index = MakeImageIndexForTesting( + "ab1122334455", {{2, 0}, {4, 1}, {6, 2}, {8, 2}}, {{10, 3}}); + // Note: {4, 1} -> {6, 3} and {6, 2} -> {4, 1}, then result is sorted. + ImageIndex new_index = MakeImageIndexForTesting( + "a11b33224455", {{1, 0}, {4, 1}, {6, 3}, {8, 1}}, {{10, 2}}); + std::vector<TargetsAffinity> affinities = MakeTargetsAffinitiesForTesting( + old_index, new_index, + EquivalenceMap({{{0, 0, 1}, 1.0}, {{1, 3, 1}, 1.0}})); + + // Raw match. + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 0, 0)); + // Raw mismatch. + EXPECT_GT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 0, 1)); + EXPECT_GT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 1, 0)); + + // Type mismatch. + EXPECT_EQ(kMismatchFatal, + GetTokenSimilarity(old_index, new_index, affinities, 0, 1)); + EXPECT_EQ(kMismatchFatal, + GetTokenSimilarity(old_index, new_index, affinities, 2, 0)); + EXPECT_EQ(kMismatchFatal, + GetTokenSimilarity(old_index, new_index, affinities, 2, 10)); + EXPECT_EQ(kMismatchFatal, + GetTokenSimilarity(old_index, new_index, affinities, 10, 1)); + + // Reference strong match. + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 2, 1)); + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 4, 6)); + + // Reference weak match. + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 6, 4)); + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 6, 8)); + EXPECT_LT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 8, 4)); + + // Weak match is not greater than strong match. + EXPECT_LE(GetTokenSimilarity(old_index, new_index, affinities, 6, 4), + GetTokenSimilarity(old_index, new_index, affinities, 2, 1)); + + // Reference mismatch. + EXPECT_GT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 2, 4)); + EXPECT_GT(0.0, GetTokenSimilarity(old_index, new_index, affinities, 2, 6)); +} + +TEST(EquivalenceMapTest, GetEquivalenceSimilarity) { + ImageIndex image_index = + MakeImageIndexForTesting("abcdef1122", {{6, 0}}, {{8, 1}}); + std::vector<TargetsAffinity> affinities = + MakeTargetsAffinitiesForTesting(image_index, image_index, {}); + + // Sanity check. These are no-op with length-0 equivalences. + EXPECT_EQ(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {0, 0, 0})); + EXPECT_EQ(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {0, 3, 0})); + EXPECT_EQ(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {3, 0, 0})); + + // Now examine larger equivalences. + EXPECT_LT(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {0, 0, 3})); + EXPECT_GE(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {0, 3, 3})); + EXPECT_GE(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {3, 0, 3})); + + EXPECT_LT(0.0, GetEquivalenceSimilarity(image_index, image_index, affinities, + {6, 6, 4})); +} + +TEST(EquivalenceMapTest, ExtendEquivalenceForward) { + auto test_extend_forward = + [](const ImageIndex old_index, const ImageIndex new_index, + const EquivalenceCandidate& equivalence, double base_similarity) { + return ExtendEquivalenceForward( + old_index, new_index, + MakeTargetsAffinitiesForTesting(old_index, new_index, {}), + equivalence, base_similarity) + .eq; + }; + + EXPECT_EQ(Equivalence({0, 0, 0}), + test_extend_forward(MakeImageIndexForTesting("", {}, {}), + MakeImageIndexForTesting("", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({0, 0, 0}), + test_extend_forward(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("zzzz", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({0, 0, 6}), + test_extend_forward(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("banana", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({2, 2, 4}), + test_extend_forward(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("banana", {}, {}), + {{2, 2, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({0, 0, 6}), + test_extend_forward(MakeImageIndexForTesting("bananaxx", {}, {}), + MakeImageIndexForTesting("bananayy", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({0, 0, 8}), + test_extend_forward(MakeImageIndexForTesting("banana11", {{6, 0}}, {}), + MakeImageIndexForTesting("banana11", {{6, 0}}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({0, 0, 6}), + test_extend_forward(MakeImageIndexForTesting("banana11", {{6, 0}}, {}), + MakeImageIndexForTesting("banana22", {}, {{6, 0}}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({0, 0, 17}), + test_extend_forward(MakeImageIndexForTesting("bananaxxpineapple", {}, {}), + MakeImageIndexForTesting("bananayypineapple", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({3, 0, 19}), + test_extend_forward( + MakeImageIndexForTesting("foobanana11xxpineapplexx", {{9, 0}}, {}), + MakeImageIndexForTesting("banana11yypineappleyy", {{6, 0}}, {}), + {{3, 0, 0}, 0.0}, 8.0)); +} + +TEST(EquivalenceMapTest, ExtendEquivalenceBackward) { + auto test_extend_backward = + [](const ImageIndex old_index, const ImageIndex new_index, + const EquivalenceCandidate& equivalence, double base_similarity) { + return ExtendEquivalenceBackward( + old_index, new_index, + MakeTargetsAffinitiesForTesting(old_index, new_index, {}), + equivalence, base_similarity) + .eq; + }; + + EXPECT_EQ(Equivalence({0, 0, 0}), + test_extend_backward(MakeImageIndexForTesting("", {}, {}), + MakeImageIndexForTesting("", {}, {}), + {{0, 0, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({6, 4, 0}), + test_extend_backward(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("zzzz", {}, {}), + {{6, 4, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({0, 0, 6}), + test_extend_backward(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("banana", {}, {}), + {{6, 6, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({2, 2, 6}), + test_extend_backward(MakeImageIndexForTesting("xxbanana", {}, {}), + MakeImageIndexForTesting("yybanana", {}, {}), + {{8, 8, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({0, 0, 8}), + test_extend_backward(MakeImageIndexForTesting("11banana", {{0, 0}}, {}), + MakeImageIndexForTesting("11banana", {{0, 0}}, {}), + {{8, 8, 0}, 0.0}, 8.0)); + + EXPECT_EQ( + Equivalence({2, 2, 6}), + test_extend_backward(MakeImageIndexForTesting("11banana", {{0, 0}}, {}), + MakeImageIndexForTesting("22banana", {}, {{0, 0}}), + {{8, 8, 0}, 0.0}, 8.0)); + + EXPECT_EQ(Equivalence({0, 0, 17}), + test_extend_backward( + MakeImageIndexForTesting("bananaxxpineapple", {}, {}), + MakeImageIndexForTesting("bananayypineapple", {}, {}), + {{8, 8, 9}, 9.0}, 8.0)); + + EXPECT_EQ( + Equivalence({3, 0, 19}), + test_extend_backward( + MakeImageIndexForTesting("foobanana11xxpineapplexx", {{9, 0}}, {}), + MakeImageIndexForTesting("banana11yypineappleyy", {{6, 0}}, {}), + {{22, 19, 0}, 0.0}, 8.0)); +} + +TEST(EquivalenceMapTest, PruneEquivalencesAndSortBySource) { + auto PruneEquivalencesAndSortBySourceTest = + [](std::vector<Equivalence>&& equivalences) { + OffsetMapper::PruneEquivalencesAndSortBySource(&equivalences); + return std::move(equivalences); + }; + + EXPECT_EQ(std::vector<Equivalence>(), + PruneEquivalencesAndSortBySourceTest({})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 1}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 1}})); + EXPECT_EQ(std::vector<Equivalence>(), + PruneEquivalencesAndSortBySourceTest({{0, 10, 0}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 1}, {1, 11, 1}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 1}, {1, 11, 1}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 2}, {2, 13, 1}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 2}, {1, 12, 2}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 2}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 2}, {1, 12, 1}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 2}, {2, 14, 1}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 2}, {1, 13, 2}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 1}, {1, 12, 3}}), + PruneEquivalencesAndSortBySourceTest({{0, 10, 2}, {1, 12, 3}})); + EXPECT_EQ(std::vector<Equivalence>({{0, 10, 3}, {3, 16, 2}}), + PruneEquivalencesAndSortBySourceTest( + {{0, 10, 3}, {1, 13, 3}, {3, 16, 2}})); // Pruning is greedy + + // Consider following pattern that may cause O(n^2) behavior if not handled + // properly. + // *************** + // ********** + // ******** + // ****** + // **** + // ** + // *************** + // This test case makes sure the function does not stall on a large instance + // of this pattern. + EXPECT_EQ(std::vector<Equivalence>({{0, 10, +300000}, {300000, 30, +300000}}), + PruneEquivalencesAndSortBySourceTest([] { + std::vector<Equivalence> equivalenses; + equivalenses.push_back({0, 10, +300000}); + for (offset_t i = 0; i < 100000; ++i) + equivalenses.push_back({200000 + i, 20, +200000 - 2 * i}); + equivalenses.push_back({300000, 30, +300000}); + return equivalenses; + }())); +} + +TEST(EquivalenceMapTest, NaiveExtendedForwardProject) { + constexpr size_t kOldImageSize = 1000U; + constexpr size_t kNewImageSize = 1000U; + OffsetMapper offset_mapper(std::vector<Equivalence>(), kOldImageSize, + kNewImageSize); + + // Convenience function to declutter. + auto project = [&offset_mapper](const Equivalence& eq, offset_t offset) { + return offset_mapper.NaiveExtendedForwardProject(eq, offset); + }; + + // Equivalence with delta = 0. + Equivalence eq_stay = {10, 10, +5}; // [10,15) -> [10,15). + for (offset_t offset = 0U; offset < 1000U; ++offset) { + EXPECT_EQ(offset, project(eq_stay, offset)); + } + // Saturate since result would overflow "new". + EXPECT_EQ(999U, project(eq_stay, 1000U)); + EXPECT_EQ(999U, project(eq_stay, 2000U)); + EXPECT_EQ(999U, project(eq_stay, kOffsetBound - 1)); + + // Equivalence with delta = -10. + Equivalence eq_dec = {20, 10, +12}; // [20,32) --> [10,22). + // Offsets in "old" block. + EXPECT_EQ(10U, project(eq_dec, 20U)); + EXPECT_EQ(11U, project(eq_dec, 21U)); + EXPECT_EQ(21U, project(eq_dec, 31U)); + // Offsets before "old" block, no underflow + EXPECT_EQ(9U, project(eq_dec, 19U)); + EXPECT_EQ(1U, project(eq_dec, 11U)); + EXPECT_EQ(0U, project(eq_dec, 10U)); + // Offsets before "old" block, underflow (possible since delta < 0). + EXPECT_EQ(0U, project(eq_dec, 9U)); + EXPECT_EQ(0U, project(eq_dec, 5U)); + EXPECT_EQ(0U, project(eq_dec, 0U)); + // Offsets after "old" block, no overflow. + EXPECT_EQ(20U, project(eq_dec, 30U)); + EXPECT_EQ(64U, project(eq_dec, 74U)); + EXPECT_EQ(90U, project(eq_dec, 100U)); + EXPECT_EQ(490U, project(eq_dec, 500U)); + EXPECT_EQ(999U, project(eq_dec, 1009U)); + // Offsets after "old" block, overflow. + EXPECT_EQ(999U, project(eq_dec, 1010U)); + EXPECT_EQ(999U, project(eq_dec, 2000U)); + EXPECT_EQ(999U, project(eq_dec, kOffsetBound - 1)); + + // Equivalence with delta = +10. + Equivalence eq_inc = {7, 17, +80}; // [7,87) --> [17,97). + // Offsets in "old" block. + EXPECT_EQ(17U, project(eq_inc, 7U)); + EXPECT_EQ(60U, project(eq_inc, 50U)); + EXPECT_EQ(96U, project(eq_inc, 86U)); + // Offsets before "old" block, underflow impossible since delta >= 0. + EXPECT_EQ(16U, project(eq_inc, 6U)); + EXPECT_EQ(10U, project(eq_inc, 0U)); + // Offsets after "old" block, no overflow. + EXPECT_EQ(97U, project(eq_inc, 87U)); + EXPECT_EQ(510U, project(eq_inc, 500U)); + EXPECT_EQ(999U, project(eq_inc, 989U)); + // Offsets after "old" block, overflow. + EXPECT_EQ(999U, project(eq_inc, 990U)); + EXPECT_EQ(999U, project(eq_inc, 2000U)); + EXPECT_EQ(999U, project(eq_inc, kOffsetBound - 1)); +} + +TEST(EquivalenceMapTest, ExtendedForwardProject) { + // EquivalenceMaps provided must be sorted by "old" offset, and pruned. + // [0,2) --> [10,12), [2,3) --> [13,14), [4,6) --> [16,18). + OffsetMapper offset_mapper1({{0, 10, +2}, {2, 13, +1}, {4, 16, +2}}, 20U, + 25U); + EXPECT_EQ(10U, offset_mapper1.ExtendedForwardProject(0U)); + EXPECT_EQ(11U, offset_mapper1.ExtendedForwardProject(1U)); + EXPECT_EQ(13U, offset_mapper1.ExtendedForwardProject(2U)); + EXPECT_EQ(14U, offset_mapper1.ExtendedForwardProject(3U)); // Previous equiv. + EXPECT_EQ(16U, offset_mapper1.ExtendedForwardProject(4U)); + EXPECT_EQ(17U, offset_mapper1.ExtendedForwardProject(5U)); + EXPECT_EQ(18U, offset_mapper1.ExtendedForwardProject(6U)); // Previous equiv. + // Fake offsets. + EXPECT_EQ(25U, offset_mapper1.ExtendedForwardProject(20U)); + EXPECT_EQ(26U, offset_mapper1.ExtendedForwardProject(21U)); + EXPECT_EQ(1005U, offset_mapper1.ExtendedForwardProject(1000U)); + EXPECT_EQ(kOffsetBound - 1, + offset_mapper1.ExtendedForwardProject(kOffsetBound - 1)); + + // [0,2) --> [10,12), [13,14) --> [2,3), [16,18) --> [4,6). + OffsetMapper offset_mapper2({{0, 10, +2}, {13, 2, +1}, {16, 4, +2}}, 25U, + 20U); + EXPECT_EQ(10U, offset_mapper2.ExtendedForwardProject(0U)); + EXPECT_EQ(11U, offset_mapper2.ExtendedForwardProject(1U)); + EXPECT_EQ(2U, offset_mapper2.ExtendedForwardProject(13U)); + EXPECT_EQ(3U, offset_mapper2.ExtendedForwardProject(14U)); // Previous equiv. + EXPECT_EQ(4U, offset_mapper2.ExtendedForwardProject(16U)); + EXPECT_EQ(5U, offset_mapper2.ExtendedForwardProject(17U)); + EXPECT_EQ(6U, offset_mapper2.ExtendedForwardProject(18U)); // Previous equiv. + // Fake offsets. + EXPECT_EQ(20U, offset_mapper2.ExtendedForwardProject(25U)); + EXPECT_EQ(21U, offset_mapper2.ExtendedForwardProject(26U)); + EXPECT_EQ(995U, offset_mapper2.ExtendedForwardProject(1000U)); + EXPECT_EQ(kOffsetBound - 1 - 5, + offset_mapper2.ExtendedForwardProject(kOffsetBound - 1)); +} + +TEST(EquivalenceMapTest, ExtendedForwardProjectEncoding) { + // Tests OffsetMapper::ExtendedForwardProject(), which maps every "old" offset + // to a "new" offset, with possible overlap (even though blocks don't + // overlap). Not testing real offsets only (no fake offsets). + // |old_spec| is a string like "<<aaAAaabbBBbcCCc>>": + // - Upper case letters are covered "old" offsets. + // - Lower case letters are non-covered offsets that are properly mapped using + // nearest "old" block. + // - '<' denotes underflow (clamped to 0). + // - '>' denotes overflow (clampled to "new" size - 1). + // |new_spec| is a string like "aaAA(ab)(ab)BBb..cCCc": + // - Upper and lower case letters are mapped "new" targets, occurring in the + // order that they appear in |old_spec|. + // - '.' are "new" offsets that appear as output. + // - '(' and ')' surround a single "new" location that are repeated as output. + int case_no = 0; + auto run_test = [&case_no](std::vector<Equivalence>&& equivalences, + const std::string& old_spec, + const std::string& new_spec) { + const size_t old_size = old_spec.length(); + // Build expected "new" offsets, queue up for each letter. + std::map<char, std::deque<offset_t>> expected; + offset_t cur_new_offset = 0; + char state = ')'; // ')' = increase offset, '(' = stay. + for (char ch : new_spec) { + if (ch == '(' || ch == ')') + state = ch; + else + expected[ch].push_back(cur_new_offset); + cur_new_offset += (state == ')') ? 1 : 0; + } + const size_t new_size = cur_new_offset; + // Forward-project for each "old" index, pull from queue from matching + // letter, and compare. + OffsetMapper offset_mapper(std::move(equivalences), old_size, new_size); + for (offset_t old_offset = 0; old_offset < old_size; ++old_offset) { + offset_t new_offset = offset_mapper.ExtendedForwardProject(old_offset); + char ch = old_spec[old_offset]; + if (ch == '<') { // Special case: Underflow. + EXPECT_EQ(0U, new_offset) << "in case " << case_no; + } else if (ch == '>') { // Special case: Overflow. + EXPECT_EQ(static_cast<offset_t>(new_size - 1), new_offset) + << "in case " << case_no; + } else { + std::deque<offset_t>& q = expected[ch]; + ASSERT_FALSE(q.empty()); + EXPECT_EQ(q.front(), new_offset) << "in case " << case_no; + q.pop_front(); + if (q.empty()) + expected.erase(ch); + } + } + // Clear useless '.', and ensure everything is consumed. + expected.erase('.'); + EXPECT_TRUE(expected.empty()) << "in case " << case_no; + ++case_no; + }; + + // Trivial: [5,9) --> [5,9). + run_test({{5, 5, +4}}, "aaaaaAAAAaaaaa", "aaaaaAAAAaaaaa"); + // Swap: [0,4) --> [6,10), [4,10) --> [0,6). + run_test({{0, 6, +4}, {4, 0, +6}}, "AAAABBBBBB", "BBBBBBAAAA"); + // Overlap: [0,4) --> [2,6), [4,10) --> [3,9). + run_test({{0, 2, +4}, {4, 3, +6}}, "AAAABBBBBB", "..A(AB)(AB)(AB)BBB."); + // Converge: [1,3) --> [2,4), [7,8) --> [6,7). + run_test({{1, 2, +2}, {7, 6, +1}}, "aAAaabbBbb", ".aAA(ab)(ab)Bbb."); + // Converge with tie-breaker: [1,3) --> [2,4), [8,9) --> [7,8). + run_test({{1, 2, +2}, {8, 7, +1}}, "aAAaaabbBb", ".aAAa(ab)(ab)Bb."); + // Shift left: [6,8) --> [2,4): Underflow occurs. + run_test({{6, 2, +2}}, "<<<<aaAAaa", "aaAAaa...."); + // Shift right: [2,5) --> [6,9): Overflow occurs. + run_test({{2, 6, +3}}, "aaAAAa>>>>", "....aaAAAa"); + // Diverge: [3,5) --> [1,3], [7,9) --> [9,11). + run_test({{3, 1, +2}, {7, 9, +2}}, "<<aAAabBBb>>", "aAAa....bBBb"); + // Pile-up: [0,2) --> [7,9), [9,11) --> [9,11), [18,20) --> [11,13). + run_test({{0, 7, +2}, {9, 9, +2}, {18, 11, +2}}, "AAaaaabbbBBbbbbcccCC", + "......b(Ab)(Abc)(Bac)(Bac)(Cab)(Cab)bb....."); + // Inverse pile-up: [7,9) --> [0,2), [9,11) --> [9,11), [13,15) --> [18,20). + run_test({{7, 0, +2}, {9, 9, +2}, {11, 18, +2}}, "<<<<<<<AABBCC>>>>>>>", + "AA.......BB.......CC"); + // Sparse rotate: [3,4) -> [10,11), [10,11) --> [17,18), [17,18) --> [3,4). + run_test({{3, 10, +1}, {10, 17, +1}, {17, 3, +1}}, "aaaAaaabbbBbbbcccCccc", + "cccCcccaaaAaaabbbBbbb"); + // Messy swap: [2,4) --> [10,12), [12,16) --> [3,7). + run_test({{2, 10, +2}, {12, 3, +4}}, "aaAAaa>><bbbBBBBbb", + "bbbBBBBb(ab)aAAaa"); + // Messy expand: [6,8) --> [3,5), [10,11) -> [11,12), [14,17) --> [16,19). + run_test({{6, 3, +2}, {10, 11, +1}, {14, 16, +3}}, "<<<aaaAAabBbbcCCCc>>>>>", + "aaaAAa....bBbb.cCCCc"); + // Interleave: [1,2) --> [0,1), [5,6) --> [10,11), [6,8) --> [3,5), + // [11,13) --> [12,14), [14,16) --> [6,8), [17,18) --> [17,18). + run_test({{1, 0, +1}, + {5, 10, +1}, + {6, 3, +2}, + {11, 12, +2}, + {14, 6, +2}, + {17, 17, +1}}, + "<AaabBCCccdDDdEEeFf>", "AaaCCc(Ec)EebBdDDd..Ff"); +} + +TEST(EquivalenceMapTest, ForwardProjectAll) { + auto ForwardProjectAllTest = [](const OffsetMapper& offset_mapper, + std::initializer_list<offset_t> offsets) { + OffsetVector offsets_vec(offsets); + offset_mapper.ForwardProjectAll(&offsets_vec); + return offsets_vec; + }; + + // [0,2) --> [10,12), [2,3) --> [13,14), [4,6) --> [16,18). + OffsetMapper offset_mapper1({{0, 10, +2}, {2, 13, +1}, {4, 16, +2}}, 100U, + 100U); + EXPECT_EQ(OffsetVector({10}), ForwardProjectAllTest(offset_mapper1, {0})); + EXPECT_EQ(OffsetVector({13}), ForwardProjectAllTest(offset_mapper1, {2})); + EXPECT_EQ(OffsetVector({}), ForwardProjectAllTest(offset_mapper1, {3})); + EXPECT_EQ(OffsetVector({10, 13}), + ForwardProjectAllTest(offset_mapper1, {0, 2})); + EXPECT_EQ(OffsetVector({11, 13, 17}), + ForwardProjectAllTest(offset_mapper1, {1, 2, 5})); + EXPECT_EQ(OffsetVector({11, 17}), + ForwardProjectAllTest(offset_mapper1, {1, 3, 5})); + EXPECT_EQ(OffsetVector({10, 11, 13, 16, 17}), + ForwardProjectAllTest(offset_mapper1, {0, 1, 2, 3, 4, 5, 6})); + + // [0,2) --> [10,12), [13,14) --> [2,3), [16,18) --> [4,6). + OffsetMapper offset_mapper2({{0, 10, +2}, {13, 2, +1}, {16, 4, +2}}, 100U, + 100U); + EXPECT_EQ(OffsetVector({2}), ForwardProjectAllTest(offset_mapper2, {13})); + EXPECT_EQ(OffsetVector({10, 2}), + ForwardProjectAllTest(offset_mapper2, {0, 13})); + EXPECT_EQ(OffsetVector({11, 2, 5}), + ForwardProjectAllTest(offset_mapper2, {1, 13, 17})); + EXPECT_EQ(OffsetVector({11, 5}), + ForwardProjectAllTest(offset_mapper2, {1, 14, 17})); + EXPECT_EQ(OffsetVector({10, 11, 2, 4, 5}), + ForwardProjectAllTest(offset_mapper2, {0, 1, 13, 14, 16, 17, 18})); +} + +TEST(EquivalenceMapTest, Build) { + auto test_build_equivalence = [](const ImageIndex old_index, + const ImageIndex new_index, + double minimum_similarity) { + auto affinities = MakeTargetsAffinitiesForTesting(old_index, new_index, {}); + + EncodedView old_view(old_index); + EncodedView new_view(new_index); + + for (const auto& old_pool_tag_and_targets : old_index.target_pools()) { + PoolTag pool_tag = old_pool_tag_and_targets.first; + std::vector<uint32_t> old_labels; + std::vector<uint32_t> new_labels; + size_t label_bound = affinities[pool_tag.value()].AssignLabels( + 1.0, &old_labels, &new_labels); + old_view.SetLabels(pool_tag, std::move(old_labels), label_bound); + new_view.SetLabels(pool_tag, std::move(new_labels), label_bound); + } + + std::vector<offset_t> old_sa = + MakeSuffixArray<InducedSuffixSort>(old_view, old_view.Cardinality()); + + EquivalenceMap equivalence_map; + equivalence_map.Build(old_sa, old_view, new_view, affinities, + minimum_similarity); + + offset_t current_dst_offset = 0; + offset_t coverage = 0; + for (const auto& candidate : equivalence_map) { + EXPECT_GE(candidate.eq.dst_offset, current_dst_offset); + EXPECT_GT(candidate.eq.length, offset_t(0)); + EXPECT_LE(candidate.eq.src_offset + candidate.eq.length, + old_index.size()); + EXPECT_LE(candidate.eq.dst_offset + candidate.eq.length, + new_index.size()); + EXPECT_GE(candidate.similarity, minimum_similarity); + current_dst_offset = candidate.eq.dst_offset; + coverage += candidate.eq.length; + } + return coverage; + }; + + EXPECT_EQ(0U, + test_build_equivalence(MakeImageIndexForTesting("", {}, {}), + MakeImageIndexForTesting("", {}, {}), 4.0)); + + EXPECT_EQ(0U, test_build_equivalence( + MakeImageIndexForTesting("", {}, {}), + MakeImageIndexForTesting("banana", {}, {}), 4.0)); + + EXPECT_EQ(0U, + test_build_equivalence(MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("", {}, {}), 4.0)); + + EXPECT_EQ(0U, test_build_equivalence( + MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("zzzz", {}, {}), 4.0)); + + EXPECT_EQ(6U, test_build_equivalence( + MakeImageIndexForTesting("banana", {}, {}), + MakeImageIndexForTesting("banana", {}, {}), 4.0)); + + EXPECT_EQ(6U, test_build_equivalence( + MakeImageIndexForTesting("bananaxx", {}, {}), + MakeImageIndexForTesting("bananayy", {}, {}), 4.0)); + + EXPECT_EQ(8U, test_build_equivalence( + MakeImageIndexForTesting("banana11", {{6, 0}}, {}), + MakeImageIndexForTesting("banana11", {{6, 0}}, {}), 4.0)); + + EXPECT_EQ(6U, test_build_equivalence( + MakeImageIndexForTesting("banana11", {{6, 0}}, {}), + MakeImageIndexForTesting("banana22", {}, {{6, 0}}), 4.0)); + + EXPECT_EQ( + 15U, + test_build_equivalence( + MakeImageIndexForTesting("banana11pineapple", {{6, 0}}, {}), + MakeImageIndexForTesting("banana22pineapple", {}, {{6, 0}}), 4.0)); + + EXPECT_EQ( + 15U, + test_build_equivalence( + MakeImageIndexForTesting("bananaxxxxxxxxpineapple", {}, {}), + MakeImageIndexForTesting("bananayyyyyyyypineapple", {}, {}), 4.0)); + + EXPECT_EQ( + 19U, + test_build_equivalence( + MakeImageIndexForTesting("foobanana11xxpineapplexx", {{9, 0}}, {}), + MakeImageIndexForTesting("banana11yypineappleyy", {{6, 0}}, {}), + 4.0)); +} + +} // namespace zucchini |