1 files changed, 101 insertions, 0 deletions

diff --git a/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/MultiThreadTestRunnable.java b/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/MultiThreadTestRunnable.java
new file mode 100644
index 00000000..a18298a2
--- /dev/null
+++ b/store/src/test/java/org/eclipse/viatra/solver/data/map/tests/fuzz/MultiThreadTestRunnable.java
@@ -0,0 +1,101 @@
+package org.eclipse.viatra.solver.data.map.tests.fuzz;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+
+import org.eclipse.viatra.solver.data.map.VersionedMapStore;
+import org.eclipse.viatra.solver.data.map.internal.VersionedMapImpl;
+import org.eclipse.viatra.solver.data.map.tests.utils.MapTestEnvironment;
+
+public class MultiThreadTestRunnable implements Runnable {
+        String scenario;
+        VersionedMapStore<Integer, String> store;
+        int steps;
+        int maxKey;
+        String[] values;
+        int seed;
+        int commitFrequency;
+        List<Throwable> errors = new LinkedList<>();
+        
+        public MultiThreadTestRunnable(String scenario, VersionedMapStore<Integer, String> store, int steps,
+                        int maxKey, String[] values, int seed, int commitFrequency) {
+                super();
+                this.scenario = scenario;
+                this.store = store;
+                this.steps = steps;
+                this.maxKey = maxKey;
+                this.values = values;
+                this.seed = seed;
+                this.commitFrequency = commitFrequency;
+        }
+
+        private void logAndThrowError(String message) {
+                AssertionError error = new AssertionError(message);
+                errors.add(error);
+        }
+        
+        public List<Throwable> getErrors() {
+                return errors;
+        }
+        
+        @Override
+        public void run() {
+                // 1. build a map with versions
+                Random r = new Random(seed);
+                VersionedMapImpl<Integer, String> versioned = (VersionedMapImpl<Integer, String>) store.createMap();
+                Map<Integer, Long> index2Version = new HashMap<>();
+
+                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();
+                                logAndThrowError(scenario + ":" + index + ": exception happened: " + exception);
+                        }
+                        if (index % commitFrequency == 0) {
+                                long version = versioned.commit();
+                                index2Version.put(i, version);
+                        }
+                        MapTestEnvironment.printStatus(scenario, index, steps, "building");
+                }
+                // 2. create a non-versioned 
+                VersionedMapImpl<Integer, String> reference = (VersionedMapImpl<Integer, String>) store.createMap();
+                r = new Random(seed);
+                Random r2 = new Random(seed+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 {
+                                reference.put(nextKey, nextValue);
+                        } catch (Exception exception) {
+                                exception.printStackTrace();
+                                logAndThrowError(scenario + ":" + index + ": exception happened: " + exception);
+                        }
+                        // go back to an existing state and compare to the reference
+                        if (index % (commitFrequency) == 0) {
+                                versioned.restore(index2Version.get(i));
+                                MapTestEnvironment.compareTwoMaps(scenario + ":" + index, reference, versioned,errors);
+                                
+                                // go back to a random state (probably created by another thread)
+                                List<Long> states = new ArrayList<>(store.getStates());
+                                Collections.shuffle(states, r2);
+                                for(Long state : states.subList(0, Math.min(states.size(), 100))) {
+                                        versioned.restore(state);
+                                }
+                                versioned.restore(index2Version.get(i));
+                        }
+
+                        MapTestEnvironment.printStatus(scenario, index, steps, "comparison");
+                }
+        }
+}