1 files changed, 116 insertions, 0 deletions

diff --git a/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/DiffCursorFuzzTest.java b/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/DiffCursorFuzzTest.java
new file mode 100644
index 00000000..4b79a98a
--- /dev/null
+++ b/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/DiffCursorFuzzTest.java
@@ -0,0 +1,116 @@
+package org.eclipse.viatra.solver.data.map.tests.fuzz;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.util.Random;
+import java.util.stream.Stream;
+
+import org.eclipse.viatra.solver.data.map.ContinousHashProvider;
+import org.eclipse.viatra.solver.data.map.DiffCursor;
+import org.eclipse.viatra.solver.data.map.VersionedMapStore;
+import org.eclipse.viatra.solver.data.map.VersionedMapStoreImpl;
+import org.eclipse.viatra.solver.data.map.internal.VersionedMapImpl;
+import org.eclipse.viatra.solver.data.map.tests.fuzz.utils.FuzzTestUtils;
+import org.eclipse.viatra.solver.data.map.tests.utils.MapTestEnvironment;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Timeout;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class DiffCursorFuzzTest {
+        private void runFuzzTest(String scenario, int seed, int steps, int maxKey, int maxValue, int commitFrequency,
+                        boolean evilHash) {
+                String[] values = MapTestEnvironment.prepareValues(maxValue);
+                ContinousHashProvider<Integer> chp = MapTestEnvironment.prepareHashProvider(evilHash);
+
+                VersionedMapStore<Integer, String> store = new VersionedMapStoreImpl<Integer, String>(chp, values[0]);
+                iterativeRandomPutsAndCommitsThenDiffcursor(scenario, store, steps, maxKey, values, seed, commitFrequency);
+        }
+
+        private void iterativeRandomPutsAndCommitsThenDiffcursor(String scenario, VersionedMapStore<Integer, String> store,
+                        int steps, int maxKey, String[] values, int seed, int commitFrequency) {
+                // 1. build a map with versions
+                Random r = new Random(seed);
+                VersionedMapImpl<Integer, String> versioned = (VersionedMapImpl<Integer, String>) store.createMap();
+                int largestCommit = -1;
+
+                for (int i = 0; i < steps; i++) {
+                        int index = i + 1;
+                        int nextKey = r.nextInt(maxKey);
+                        String nextValue = values[r.nextInt(values.length)];
+                        try {
+                                versioned.put(nextKey, nextValue);
+                        } catch (Exception exception) {
+                                exception.printStackTrace();
+                                fail(scenario + ":" + index + ": exception happened: " + exception);
+                        }
+                        if (index % commitFrequency == 0) {
+                                long version = versioned.commit();
+                                largestCommit = (int) version;
+                        }
+                        if (index % 10000 == 0)
+                                System.out.println(scenario + ":" + index + "/" + steps + " building finished");
+                }
+                // 2. create a non-versioned map,
+                VersionedMapImpl<Integer, String> moving = (VersionedMapImpl<Integer, String>) store.createMap();
+                Random r2 = new Random(seed + 1);
+
+                final int diffTravelFrequency = commitFrequency * 2;
+                for (int i = 0; i < steps; i++) {
+                        int index = i + 1;
+                        if (index % diffTravelFrequency == 0) {
+                                // difftravel
+                                long travelToVersion = r2.nextInt(largestCommit + 1);
+                                DiffCursor<Integer, String> diffCursor = moving.getDiffCursor(travelToVersion);
+                                moving.putAll(diffCursor);
+
+                        } else {
+                                // random puts
+                                int nextKey = r2.nextInt(maxKey);
+                                String nextValue = values[r2.nextInt(values.length)];
+                                try {
+                                        moving.put(nextKey, nextValue);
+                                } catch (Exception exception) {
+                                        exception.printStackTrace();
+                                        fail(scenario + ":" + index + ": exception happened: " + exception);
+                                }
+                                if (index % commitFrequency == 0) {
+                                        versioned.commit();
+                                }
+                                if (index % 10000 == 0)
+                                        System.out.println(scenario + ":" + index + "/" + steps + " building finished");
+                        }
+                }
+
+        }
+
+        @ParameterizedTest(name = "Mutable-Immutable Compare {index}/{0} Steps={1} Keys={2} Values={3} commit frequency={4} seed={5} evil-hash={6}")
+        @MethodSource
+        @Timeout(value = 10)
+        @Tag("fuzz")
+        void parametrizedFuzz(int tests, int steps, int noKeys, int noValues, int commitFrequency, int seed,
+                        boolean evilHash) {
+                runFuzzTest("MutableImmutableCompareS" + steps + "K" + noKeys + "V" + noValues + "s" + seed, seed, steps,
+                                noKeys, noValues, commitFrequency, evilHash);
+        }
+
+        static Stream<Arguments> parametrizedFuzz() {
+                return FuzzTestUtils.permutationWithSize(new Object[] { FuzzTestUtils.FAST_STEP_COUNT }, new Object[] { 3, 32, 32 * 32 },
+                                new Object[] { 2, 3 }, new Object[] { 1, 10, 100 }, new Object[] { 1, 2, 3 },
+                                new Object[] { false, true });
+        }
+        @ParameterizedTest(name = "Mutable-Immutable Compare {index}/{0} Steps={1} Keys={2} Values={3} commit frequency={4} seed={5} evil-hash={6}")
+        @MethodSource
+        @Tag("fuzz")
+        @Tag("slow")
+        void parametrizedSlowFuzz(int tests, int steps, int noKeys, int noValues, int commitFrequency, int seed,
+                        boolean evilHash) {
+                runFuzzTest("MutableImmutableCompareS" + steps + "K" + noKeys + "V" + noValues + "s" + seed, seed, steps, noKeys, noValues,
+                                commitFrequency, evilHash);
+        }
+
+        static Stream<Arguments> parametrizedSlowFuzz() {
+                return FuzzTestUtils.changeStepCount(parametrizedFuzz(), 1);
+        }
+}