Build for macOS

.circleci/config.yml

@@ -64,7 +64,7 @@ jobs:
       # Note: Code signing is done using CSC_LINK (see https://www.electron.build/code-signing).
       - run:
           name: Build GDevelop IDE
-          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --mac --publish=never
+          command: export CSC_FOR_PULL_REQUEST=true && export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --mac --publish=never
 
       - run:
           name: Clean dist folder to keep only installers/binaries.
@@ -101,8 +101,8 @@ jobs:
           command: sudo apt-get update && sudo apt install cmake
 
       - run:
-         name: Install Python3 dependencies for Emscripten
-         command: sudo apt install python-is-python3 python3-distutils -y
+          name: Install Python3 dependencies for Emscripten
+          command: sudo apt install python-is-python3 python3-distutils -y
 
       - run:
           name: Install Emscripten (for GDevelop.js)
@@ -178,8 +178,8 @@ jobs:
           command: sudo apt-get update && sudo apt install cmake
 
       - run:
-         name: Install Python3 dependencies for Emscripten
-         command: sudo apt install python-is-python3 python3-distutils -y
+          name: Install Python3 dependencies for Emscripten
+          command: sudo apt install python-is-python3 python3-distutils -y
 
       - run:
           name: Install Emscripten (for GDevelop.js)

Extensions/Physics2Behavior/JsExtension.js

@@ -420,7 +420,6 @@ module.exports = {
       )
       .setIncludeFile('Extensions/Physics2Behavior/physics2runtimebehavior.js')
       .addIncludeFile('Extensions/Physics2Behavior/box2d.js')
-      .addIncludeFile('Extensions/Physics2Behavior/utils.js');
 
     // Global
     aut

Extensions/Physics2Behavior/physics2runtimebehavior.ts

@@ -20,7 +20,13 @@ namespace gdjs {
     // Start with 1 so the user is safe from default variables value (0)
     joints: any = {};
 
+    // List of physics behavior in the runtimeScene. It should be updated
+    // when a new physics object is created (constructor), on destruction (onDestroy),
+    // on behavior activation (onActivate) and on behavior deactivation (onDeActivate).
+    _registeredBehaviors: Set<Physics2RuntimeBehavior>;
+
     constructor(runtimeScene, sharedData) {
+      this._registeredBehaviors = new Set();
       this.gravityX = sharedData.gravityX;
       this.gravityY = sharedData.gravityY;
       this.scaleX = sharedData.scaleX === 0 ? 100 : sharedData.scaleX;
@@ -104,6 +110,40 @@ namespace gdjs {
       return runtimeScene.physics2SharedData;
     }
 
+    /**
+     * Add a physics object to the list of existing object.
+     */
+    addToBehaviorsList(physicsBehavior: gdjs.Physics2RuntimeBehavior) {
+      this._registeredBehaviors.add(physicsBehavior);
+    }
+
+    /**
+     * Remove a physics object to the list of existing object.
+     */
+    removeFromBehaviorsList(physicsBehavior: gdjs.Physics2RuntimeBehavior) {
+      this._registeredBehaviors.delete(physicsBehavior);
+    }
+
+    /**
+     * Reset all contactsStartedThisFrame and contactsEndedThisFrame of all
+     * registered physics behavior.
+     */
+    resetStartedAndEndedCollisions() {
+      for (const physicsBehavior of this._registeredBehaviors) {
+        physicsBehavior.contactsStartedThisFrame.length = 0;
+        physicsBehavior.contactsEndedThisFrame.length = 0;
+      }
+    }
+
+    /**
+     * Update all registered body.
+     */
+    updateBodiesFromObjects() {
+      for (const physicsBehavior of this._registeredBehaviors) {
+        physicsBehavior.updateBodyFromObject();
+      }
+    }
+
     step(deltaTime) {
       this.frameTime += deltaTime;
       if (this.frameTime >= this.timeStep) {
@@ -241,13 +281,29 @@ namespace gdjs {
     layers: any;
     masks: any;
     shapeScale: number = 1;
+    // Array containing the beginning of contacts reported by onContactBegin. Each contact
+    // should be unique to avoid recording glitches where the object loses and regain
+    // contact between two frames. The array is updated each time the method
+    // onContactBegin is called by the listener, which is only called when stepping
+    // the world i.e. in the first preEvent called by a physics behavior. This array is
+    // cleared just before stepping the world.
     contactsStartedThisFrame: Array<Physics2RuntimeBehavior>;
+    // Array containing the end of contacts reported by onContactEnd. The array is updated
+    // each time the method onContactEnd is called by the listener, which can be called at
+    // any time. This array is cleared just before stepping the world.
     contactsEndedThisFrame: Array<Physics2RuntimeBehavior>;
+    // Array containing the exact current contacts with the objects. It is updated
+    // each time the methods onContactBegin and onContactEnd are called by the contact
+    // listener.
     currentContacts: Array<Physics2RuntimeBehavior>;
+    destroyedDuringFrameLogic: boolean;
     _body: any = null;
-    _sharedData: any;
     _tempb2Vec2: any;
 
+    // sharedData is a reference to the shared data of the scene, that registers
+    // every physics behavior that is created so that collisions can be cleared
+    // before stepping the world.
+    _sharedData: Physics2SharedData;
     // Avoid creating new vectors all the time
     _tempb2Vec2Sec: any;
 
@@ -287,12 +343,14 @@ namespace gdjs {
       this.contactsEndedThisFrame = [];
       this.currentContacts = [];
       this.currentContacts.length = 0;
+      this.destroyedDuringFrameLogic = false;
       this._sharedData = Physics2SharedData.getSharedData(
         runtimeScene,
         behaviorData.name
       );
       this._tempb2Vec2 = new Box2D.b2Vec2();
       this._tempb2Vec2Sec = new Box2D.b2Vec2();
+      this._sharedData.addToBehaviorsList(this);
     }
 
     // Stores a Box2D pointer of created vertices
@@ -377,6 +435,7 @@ namespace gdjs {
     }
 
     onDeActivate() {
+      this._sharedData.removeFromBehaviorsList(this);
       if (this._body !== null) {
         // When a body is deleted, Box2D removes automatically its joints, leaving an invalid pointer in our joints list
         this._sharedData.clearBodyJoints(this._body);
@@ -391,9 +450,22 @@ namespace gdjs {
         this._sharedData.world.DestroyBody(this._body);
         this._body = null;
       }
+      this.contactsEndedThisFrame.length = 0;
+      this.contactsStartedThisFrame.length = 0;
+      this.currentContacts.length = 0;
+    }
+
+    onActivate() {
+      this._sharedData.addToBehaviorsList(this);
+
+      this.contactsEndedThisFrame.length = 0;
+      this.contactsStartedThisFrame.length = 0;
+      this.currentContacts.length = 0;
+      this.updateBodyFromObject();
     }
 
     onDestroy() {
+      this.destroyedDuringFrameLogic = true;
       this.onDeActivate();
     }
 
@@ -641,8 +713,7 @@ namespace gdjs {
     recreateShape() {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Destroy the old shape
@@ -673,7 +744,8 @@ namespace gdjs {
       return this._body;
     }
 
-    createBody() {
+    createBody(): boolean {
+      if (!this.activated() || this.destroyedDuringFrameLogic) return false;
       // Generate the body definition
       const bodyDef = new Box2D.b2BodyDef();
 
@@ -711,16 +783,15 @@ namespace gdjs {
       // Update cached size
       this._objectOldWidth = this.owner.getWidth();
       this._objectOldHeight = this.owner.getHeight();
+      return true;
     }
 
     doStepPreEvents(runtimeScene) {
-      // Create a body if there is not one
-      if (this._body === null) {
-        this.createBody();
-      }
-
       // Step the world if not done this frame yet
       if (!this._sharedData.stepped) {
+        // Reset started and ended contacts array for all physics instances.
+        this._sharedData.resetStartedAndEndedCollisions();
+        this._sharedData.updateBodiesFromObjects();
         this._sharedData.step(
           runtimeScene.getTimeManager().getElapsedTime() / 1000.0
         );
@@ -741,37 +812,25 @@ namespace gdjs {
       );
       this.owner.setAngle(gdjs.toDegrees(this._body.GetAngle()));
 
-      // Update cached transform
+      // Update cached transform.
       this._objectOldX = this.owner.getX();
       this._objectOldY = this.owner.getY();
       this._objectOldAngle = this.owner.getAngle();
-
-      gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-        this.currentContacts,
-        this.contactsStartedThisFrame,
-        this.contactsEndedThisFrame
-      );
     }
 
     doStepPostEvents(runtimeScene) {
-      this._updateBodyFromObject();
-
-      // Reset contacts that happened this frame
-      this.contactsStartedThisFrame.length = 0;
-      this.contactsEndedThisFrame.length = 0;
-
       // Reset world step to update next frame
       this._sharedData.stepped = false;
     }
 
     onObjectHotReloaded() {
-      this._updateBodyFromObject();
+      this.updateBodyFromObject();
     }
 
-    _updateBodyFromObject() {
+    updateBodyFromObject() {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // The object size has changed, recreate the shape.
@@ -868,8 +927,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update body type
@@ -892,8 +950,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update body type
@@ -916,8 +973,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update body type
@@ -940,8 +996,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update body bullet flag
@@ -955,8 +1010,7 @@ namespace gdjs {
     setFixedRotation(enable): void {
       this.fixedRotation = enable;
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
       this._body.SetFixedRotation(this.fixedRotation);
     }
@@ -968,8 +1022,7 @@ namespace gdjs {
     setSleepingAllowed(enable): void {
       this.canSleep = enable;
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
       this._body.SetSleepingAllowed(this.canSleep);
     }
@@ -977,7 +1030,7 @@ namespace gdjs {
     isSleeping(): boolean {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return true;
       }
 
       // Get the body sleeping state
@@ -1004,8 +1057,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body density
@@ -1033,8 +1085,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body friction
@@ -1068,8 +1119,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body restitution
@@ -1098,8 +1148,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body linear damping
@@ -1121,8 +1170,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body angular damping
@@ -1144,8 +1192,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body gravity scale
@@ -1181,8 +1228,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body layers
@@ -1220,8 +1266,7 @@ namespace gdjs {
 
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return;
+        if (!this.createBody()) return;
       }
 
       // Update the body masks
@@ -1233,8 +1278,7 @@ namespace gdjs {
     getLinearVelocityX(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return 0;
+        if (!this.createBody()) return 0;
       }
 
       // Get the linear velocity on X
@@ -1244,7 +1288,7 @@ namespace gdjs {
     setLinearVelocityX(linearVelocityX): void {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Set the linear velocity on X
@@ -1259,8 +1303,7 @@ namespace gdjs {
     getLinearVelocityY(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return 0;
+        if (!this.createBody()) return 0;
       }
 
       // Get the linear velocity on Y
@@ -1270,7 +1313,7 @@ namespace gdjs {
     setLinearVelocityY(linearVelocityY): void {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Set the linear velocity on Y
@@ -1282,11 +1325,10 @@ namespace gdjs {
       );
     }
 
-    getLinearVelocityLength() {
+    getLinearVelocityLength(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return 0;
+        if (!this.createBody()) return 0;
       }
 
       // Get the linear velocity length
@@ -1296,10 +1338,10 @@ namespace gdjs {
       ).Length();
     }
 
-    getAngularVelocity() {
+    getAngularVelocity(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return 0;
       }
 
       // Get the angular velocity
@@ -1309,7 +1351,7 @@ namespace gdjs {
     setAngularVelocity(angularVelocity): void {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Set the angular velocity
@@ -1319,7 +1361,7 @@ namespace gdjs {
     applyForce(forceX, forceY, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1338,7 +1380,7 @@ namespace gdjs {
     applyPolarForce(angle, length, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1358,7 +1400,7 @@ namespace gdjs {
     applyForceTowardPosition(length, towardX, towardY, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1381,7 +1423,7 @@ namespace gdjs {
     applyImpulse(impulseX, impulseY, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1400,7 +1442,7 @@ namespace gdjs {
     applyPolarImpulse(angle, length, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1420,7 +1462,7 @@ namespace gdjs {
     applyImpulseTowardPosition(length, towardX, towardY, positionX, positionY) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1443,7 +1485,7 @@ namespace gdjs {
     applyTorque(torque) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1456,7 +1498,7 @@ namespace gdjs {
     applyAngularImpulse(angularImpulse) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Wake up the object
@@ -1469,7 +1511,7 @@ namespace gdjs {
     getMass(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return 0;
       }
 
       // Wake up the object
@@ -1481,7 +1523,7 @@ namespace gdjs {
     getInertia(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return 0;
       }
 
       // Wake up the object
@@ -1493,7 +1535,7 @@ namespace gdjs {
     getMassCenterX(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return 0;
       }
 
       // Get the mass center on X
@@ -1503,7 +1545,7 @@ namespace gdjs {
     getMassCenterY(): float {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return 0;
       }
 
       // Get the mass center on Y
@@ -1514,8 +1556,7 @@ namespace gdjs {
     isJointFirstObject(jointId): boolean {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return false;
+        if (!this.createBody()) return false;
       }
 
       // Get the joint
@@ -1533,8 +1574,7 @@ namespace gdjs {
     isJointSecondObject(jointId): boolean {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
-        return false;
+        if (!this.createBody()) return false;
       }
 
       // Get the joint
@@ -1647,7 +1687,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -1818,7 +1858,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Set joint settings
@@ -1887,7 +1927,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -2178,7 +2218,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -2503,7 +2543,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -2677,7 +2717,7 @@ namespace gdjs {
     addGearJoint(jointId1, jointId2, ratio, collideConnected, variable) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Get the first joint
@@ -2798,7 +2838,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // Set joint settings
@@ -2973,7 +3013,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -3249,7 +3289,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -3383,7 +3423,7 @@ namespace gdjs {
     addRopeJoint(x1, y1, other, x2, y2, maxLength, collideConnected, variable) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -3490,7 +3530,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -3618,7 +3658,7 @@ namespace gdjs {
     ) {
       // If there is no body, set a new one
       if (this._body === null) {
-        this.createBody();
+        if (!this.createBody()) return;
       }
 
       // If there is no second object or it doesn't share the behavior, return
@@ -3840,6 +3880,7 @@ namespace gdjs {
       // start again right away. It is considered a glitch
       // and should not be detected.
       let i = this.contactsEndedThisFrame.indexOf(otherBehavior);
+      this.currentContacts.push(otherBehavior);
       if (i !== -1) {
         this.contactsEndedThisFrame.splice(i, 1);
       } else {
@@ -3849,6 +3890,10 @@ namespace gdjs {
 
     onContactEnd(otherBehavior: Physics2RuntimeBehavior) {
       this.contactsEndedThisFrame.push(otherBehavior);
+      const index = this.currentContacts.indexOf(otherBehavior);
+      if (index !== -1) {
+        this.currentContacts.splice(index, 1);
+      }
     }
 
     /**

Extensions/Physics2Behavior/tests/physics2runtimebehavior.spec.js

@@ -65,6 +65,60 @@ function createGameWithSceneWithPhysics2SharedData() {
   return [runtimeGame, runtimeScene];
 }
 
+class BehaviorTest extends gdjs.RuntimeBehavior {
+  collisionsStartedThisFrame = [];
+  collisionsEndedThisFrame = [];
+  currentCollisions = [];
+  other;
+  isPostEventActivated = false;
+  isPreEventActivated = false;
+
+  constructor(runtimeScene, behaviorData, owner) {
+    super(runtimeScene, behaviorData, owner);
+    this.collisionsStartedThisFrame = behaviorData.collisionsStartedThisFrame;
+    this.collisionsEndedThisFrame = behaviorData.collisionsEndedThisFrame;
+    this.currentCollisions = behaviorData.currentCollisions;
+    this.other = behaviorData.other;
+  }
+
+  activatePostEvent(activate) {
+    this.isPostEventActivated = activate;
+  }
+  activatePreEvent(activate) {
+    this.isPreEventActivated = activate;
+  }
+
+  setExpectedCollisions({ started, collision, stopped }) {
+    this.collisionsStartedThisFrame = started;
+    this.currentCollisions = collision;
+    this.collisionsEndedThisFrame = stopped;
+  }
+
+  doStepPreEvents() {
+    if (this.isPreEventActivated) {
+      const physicsBehavior = this.owner.getBehavior('Physics2');
+      assertCollision(this.owner, this.other, {
+        started: this.collisionsStartedThisFrame,
+        collision: this.currentCollisions,
+        stopped: this.collisionsEndedThisFrame,
+      });
+    }
+  }
+
+  doStepPostEvents() {
+    if (this.isPostEventActivated) {
+      const physicsBehavior = this.owner.getBehavior('Physics2');
+      assertCollision(this.owner, this.other, {
+        started: this.collisionsStartedThisFrame,
+        collision: this.currentCollisions,
+        stopped: this.collisionsEndedThisFrame,
+      });
+    }
+  }
+}
+
+gdjs.registerBehavior('Physics2::BehaviorTest', BehaviorTest);
+
 function createObject(runtimeScene, behaviorProperties) {
   const object = new gdjs.TestRuntimeObject(runtimeScene, {
     name: 'obj1',
@@ -104,6 +158,223 @@ function createObject(runtimeScene, behaviorProperties) {
 }
 
 describe('Physics2RuntimeBehavior', () => {
+  describe('Behavior activation and reactivation', () => {
+    let runtimeGame;
+    let runtimeScene;
+    beforeEach(() => {
+      [runtimeGame, runtimeScene] = createGameWithSceneWithPhysics2SharedData();
+    });
+
+    it('should not leave a living body after removing an object', () => {
+      const object = createObject(runtimeScene);
+
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const behavior = object.getBehavior('Physics2');
+      if (!behavior) {
+        throw new Error('Behavior not found, test cannot be run.');
+      }
+
+      // First render to have the behavior set up
+      runtimeScene.renderAndStep(1000 / 60);
+      expect(behavior.getBody()).not.to.be(null);
+      expect(behavior._sharedData._registeredBehaviors.size).to.be(1);
+      expect(behavior._sharedData._registeredBehaviors.has(behavior)).to.be(
+        true
+      );
+
+      // Delete object from scene
+      object.deleteFromScene(runtimeScene);
+      expect(behavior.destroyedDuringFrameLogic).to.be(true);
+      expect(behavior.getBody()).to.be(null);
+      expect(behavior._sharedData._registeredBehaviors.size).to.be(0);
+      expect(behavior._sharedData._registeredBehaviors.has(behavior)).to.be(
+        false
+      );
+
+      // Call a few methods on the behavior
+      behavior.setLinearDamping(2);
+      behavior.setGravityScale(2);
+
+      // Body should still not exist
+      expect(behavior.getBody()).to.be(null);
+    });
+
+    it("doesn't raise errors if an object with a deactivated physics2 behavior is removed", () => {
+      const object = createObject(runtimeScene);
+
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const behavior = object.getBehavior('Physics2');
+      if (!behavior) {
+        throw new Error('Behavior not found, test cannot be run.');
+      }
+
+      // First render to have the behavior set up
+      runtimeScene.renderAndStep(1000 / 60);
+      expect(behavior.getBody()).not.to.be(null);
+      expect(behavior._sharedData._registeredBehaviors.size).to.be(1);
+      expect(behavior._sharedData._registeredBehaviors.has(behavior)).to.be(
+        true
+      );
+
+      object.activateBehavior('Physics2', false);
+      expect(behavior.getBody()).to.be(null);
+      expect(behavior._sharedData._registeredBehaviors.size).to.be(0);
+      expect(behavior._sharedData._registeredBehaviors.has(behavior)).to.be(
+        false
+      );
+
+      object.deleteFromScene(runtimeScene);
+
+      expect(behavior.destroyedDuringFrameLogic).to.be(true);
+      expect(behavior.getBody()).to.be(null);
+      expect(behavior._sharedData._registeredBehaviors.size).to.be(0);
+    });
+
+    it("should not recreate object's body when setting or getting behavior properties", () => {
+      const object = createObject(runtimeScene);
+
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const behavior = object.getBehavior('Physics2');
+      if (!behavior) {
+        throw new Error('Behavior not found, test cannot be run.');
+      }
+
+      // First render to have the behavior set up
+      runtimeScene.renderAndStep(1000 / 60);
+      expect(behavior.getBody()).not.to.be(null);
+
+      // Deactivate behavior
+      object.activateBehavior('Physics2', false);
+      expect(behavior.getBody()).to.be(null);
+
+      // Call bunch of methods that should have no impact on the object's body
+      behavior.setDensity(123);
+      behavior.setRestitution(0.5);
+      behavior.getLinearVelocityLength();
+      behavior.applyImpulse(10, -20, 0, 0);
+      behavior.getMassCenterX();
+
+      // Object's body should still not exist
+      expect(behavior.getBody()).to.be(null);
+
+      // Reactivate behavior
+      object.activateBehavior('Physics2', true);
+      expect(behavior.getBody()).not.to.be(null);
+
+      // Behavior should have recorded what was called with its setters while it was de-activated.
+      expect(behavior.getDensity()).to.be(123);
+      expect(behavior.getRestitution()).to.be(0.5);
+    });
+
+    it('should clear contacts when deactivating the physics2 behavior', () => {
+      const fps = 60;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      // Create objects not in contact
+      const object1 = createObject(runtimeScene, { bodyType: 'Dynamic' });
+      object1.setPosition(100, 0);
+      const object2 = createObject(runtimeScene, {
+        bodyType: 'Static',
+        restitution: 0,
+      });
+      object1.setPosition(0, 0);
+
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const object1Behavior = object1.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const object2Behavior = object2.getBehavior('Physics2');
+      if (!object2Behavior || !object1Behavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+      expect(object1Behavior.getBody()).not.to.be(null);
+      expect(object2Behavior.getBody()).not.to.be(null);
+      expect(object1Behavior._sharedData._registeredBehaviors.size).to.be(2);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object1Behavior)
+      ).to.be(true);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object2Behavior)
+      ).to.be(true);
+
+      // Put objects in contact and asset collision started during the frame
+      runtimeScene.setEventsFunction(() => {
+        object1.setPosition(10, 0);
+        object2.setPosition(20, 0);
+        assertCollision(object1, object2, {
+          started: true,
+          collision: true,
+          stopped: false,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+
+      // After post event, collision should be present
+      assertCollision(object1, object2, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+
+      // Reset scene events
+      runtimeScene.setEventsFunction(() => {});
+
+      // Deactivate physics behavior and test that collisions are cleared.
+      object1.activateBehavior('Physics2', false);
+      assertCollision(object1, object2, {
+        started: false,
+        collision: false,
+        // It should be false because the condition does not have sense anymore
+        // since the behavior is deactivated.
+        stopped: false,
+      });
+      // Objects should have 0 contacts in memory.
+      expect(object1Behavior.currentContacts.length).to.be(0);
+      expect(object1Behavior.contactsEndedThisFrame.length).to.be(0);
+      expect(object1Behavior.contactsStartedThisFrame.length).to.be(0);
+      expect(object1Behavior._sharedData._registeredBehaviors.size).to.be(1);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object1Behavior)
+      ).to.be(false);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object2Behavior)
+      ).to.be(true);
+
+      runtimeScene.renderAndStep(1000 / fps);
+
+      // Reactivate physics behavior and test contact
+      // is not immediately back on but after the first render.
+      object1.activateBehavior('Physics2', true);
+      expect(object1Behavior.currentContacts.length).to.be(0);
+      expect(object1Behavior.contactsEndedThisFrame.length).to.be(0);
+      expect(object1Behavior.contactsStartedThisFrame.length).to.be(0);
+      expect(object1Behavior._sharedData._registeredBehaviors.size).to.be(2);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object1Behavior)
+      ).to.be(true);
+      expect(
+        object1Behavior._sharedData._registeredBehaviors.has(object2Behavior)
+      ).to.be(true);
+
+      runtimeScene.setEventsFunction(() => {
+        assertCollision(object1, object2, {
+          started: true,
+          collision: true,
+          stopped: false,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+
+      assertCollision(object1, object2, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+    });
+  });
+
   describe('Contacts computation', () => {
     let runtimeGame;
     let runtimeScene;
@@ -122,7 +393,9 @@ describe('Physics2RuntimeBehavior', () => {
       const staticObject = createObject(runtimeScene, { bodyType: 'Static' });
       staticObject.setPosition(0, 25);
       movingObject.setPosition(0, 0);
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const movingObjectBehavior = movingObject.getBehavior('Physics2');
       if (!staticObjectBehavior || !movingObjectBehavior) {
         throw new Error('Behaviors not found, test cannot be run.');
@@ -156,6 +429,13 @@ describe('Physics2RuntimeBehavior', () => {
         stepIndex++;
       }
 
+      // Should be cleared at next step.
+      assertCollision(movingObject, staticObject, {
+        started: true,
+        collision: true,
+        stopped: true,
+      });
+
       if (!hasBounced) {
         throw new Error('Contact did not happen, nothing was tested.');
       }
@@ -172,7 +452,9 @@ describe('Physics2RuntimeBehavior', () => {
       const staticObject = createObject(runtimeScene, { bodyType: 'Static' });
       staticObject.setPosition(0, 25);
       movingObject.setPosition(0, 0);
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const movingObjectBehavior = movingObject.getBehavior('Physics2');
       if (!staticObjectBehavior || !movingObjectBehavior) {
         throw new Error('Behaviors not found, test cannot be run.');
@@ -232,6 +514,257 @@ describe('Physics2RuntimeBehavior', () => {
         throw new Error('End of contact was not detected, nothing was tested.');
       }
     });
+
+    it('should not detect a contact while already in contact as a new one (the contact jittered).', () => {
+      const fps = 50;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      const movingObject = createObject(runtimeScene);
+      const staticObject = createObject(runtimeScene, {
+        bodyType: 'Static',
+        restitution: 0,
+      });
+      staticObject.setPosition(0, 9);
+      movingObject.setPosition(0, 0);
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const movingObjectBehavior = movingObject.getBehavior('Physics2');
+      if (!staticObjectBehavior || !movingObjectBehavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+
+      runtimeScene.setEventsFunction(() => {
+        // Manually call onContactEnd and onContactBegin methods to simulate
+        // a loss of contact followed by a contact beginning during the event.
+        movingObject
+          .getBehavior('Physics2')
+          .onContactEnd(staticObject.getBehavior('Physics2'));
+
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: false,
+          stopped: true,
+        });
+
+        movingObject
+          .getBehavior('Physics2')
+          .onContactBegin(staticObject.getBehavior('Physics2'));
+
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: true,
+          stopped: false,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+    });
+
+    it('should not detect a new contact if the contact ended and jittered.', () => {
+      const fps = 50;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      const movingObject = createObject(runtimeScene);
+      const staticObject = createObject(runtimeScene, {
+        bodyType: 'Static',
+        restitution: 0,
+      });
+      staticObject.setPosition(0, 4);
+      movingObject.setPosition(0, 0);
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
+      const movingObjectBehavior = movingObject.getBehavior('Physics2');
+      if (!staticObjectBehavior || !movingObjectBehavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+      runtimeScene.renderAndStep(1000 / fps);
+
+      assertCollision(movingObject, staticObject, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+
+      runtimeScene.setEventsFunction(() => {
+        // Manually call onContactEnd and onContactBegin methods to simulate
+        // a loss of contact followed by a contact beginning and another loss
+        // of contact during the event.
+        movingObject
+          .getBehavior('Physics2')
+          .onContactEnd(staticObject.getBehavior('Physics2'));
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: false,
+          stopped: true,
+        });
+
+        movingObject
+          .getBehavior('Physics2')
+          .onContactBegin(staticObject.getBehavior('Physics2'));
+
+        // Started is false because it is like the jittered contact case.
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: true,
+          stopped: false,
+        });
+
+        movingObject
+          .getBehavior('Physics2')
+          .onContactEnd(staticObject.getBehavior('Physics2'));
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: false,
+          stopped: true,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+    });
+
+    it('it should end collision on resize (body updated in pre-event).', () => {
+      const fps = 50;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      const movingObject = createObject(runtimeScene);
+      const staticObject = createObject(runtimeScene, {
+        bodyType: 'Static',
+        restitution: 0,
+      });
+      staticObject.setPosition(0, 9);
+      movingObject.setPosition(0, 0);
+      const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      const movingObjectBehavior = movingObject.getBehavior('Physics2');
+      if (!staticObjectBehavior || !movingObjectBehavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+
+      runtimeScene.setEventsFunction(() => {
+        assertCollision(movingObject, staticObject, {
+          started: true,
+          collision: true,
+          stopped: false,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+
+      // Resize (postEvent operation).
+      runtimeScene.setEventsFunction(() => {
+        movingObject.setCustomWidthAndHeight(5, 5);
+
+        // Body should be updated next frame.
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: true,
+          stopped: false,
+        });
+      });
+
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: false,
+        collision: true,
+        stopped: false,
+      });
+      runtimeScene.setEventsFunction(() => {
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: false,
+          stopped: true,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: false,
+        collision: false,
+        stopped: true,
+      });
+    });
+
+    it('it should end collision on object destruction (loss of contact begins during event).', () => {
+      const fps = 50;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      const movingObject = createObject(runtimeScene);
+      const staticObject = createObject(runtimeScene, {
+        bodyType: 'Static',
+        restitution: 0,
+      });
+      staticObject.setPosition(0, 9);
+      movingObject.setPosition(0, 0);
+      const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      const movingObjectBehavior = movingObject.getBehavior('Physics2');
+      if (!staticObjectBehavior || !movingObjectBehavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+
+      runtimeScene.setEventsFunction(() => {
+        assertCollision(movingObject, staticObject, {
+          started: true,
+          collision: true,
+          stopped: false,
+        });
+      });
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: true,
+        collision: true,
+        stopped: false,
+      });
+
+      // Destroy (postEvent operation).
+      runtimeScene.setEventsFunction(() => {
+        movingObject.deleteFromScene(runtimeScene);
+
+        // Collision should be reset on destroyed object and
+        // added to contactsStoppedThisFrame array of the other object.
+        assertCollision(movingObject, staticObject, {
+          started: false,
+          collision: false,
+          stopped: false,
+        });
+        assertCollision(staticObject, movingObject, {
+          started: false,
+          collision: false,
+          stopped: true,
+        });
+      });
+
+      runtimeScene.renderAndStep(1000 / fps);
+      assertCollision(movingObject, staticObject, {
+        started: false,
+        collision: false,
+        stopped: false,
+      });
+      assertCollision(staticObject, movingObject, {
+        started: false,
+        collision: false,
+        stopped: true,
+      });
+    });
   });
 
   describe('onContactBegin', () => {
@@ -248,7 +781,9 @@ describe('Physics2RuntimeBehavior', () => {
       const object = createObject(runtimeScene);
       const otherObject = createObject(runtimeScene);
 
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const behavior = object.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const otherBehavior = otherObject.getBehavior('Physics2');
       if (!behavior || !otherBehavior) {
         throw new Error('Behavior not found, test cannot be run.');
@@ -270,7 +805,9 @@ describe('Physics2RuntimeBehavior', () => {
       const object = createObject(runtimeScene);
       const otherObject = createObject(runtimeScene);
 
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const behavior = object.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const otherBehavior = otherObject.getBehavior('Physics2');
       if (!behavior || !otherBehavior) {
         throw new Error('Behavior not found, test cannot be run.');
@@ -300,7 +837,9 @@ describe('Physics2RuntimeBehavior', () => {
       const object = createObject(runtimeScene);
       const otherObject = createObject(runtimeScene);
 
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const behavior = object.getBehavior('Physics2');
+      /** @type {gdjs.Physics2RuntimeBehavior | null} */
       const otherBehavior = otherObject.getBehavior('Physics2');
       if (!behavior || !otherBehavior) {
         throw new Error('Behavior not found, test cannot be run.');
@@ -318,4 +857,104 @@ describe('Physics2RuntimeBehavior', () => {
       expect(behavior.contactsEndedThisFrame.length).to.be(0);
     });
   });
+
+  describe('Behavior interaction with other objects behaviors and extensions.', () => {
+    let runtimeGame;
+    let runtimeScene;
+    beforeEach(() => {
+      [runtimeGame, runtimeScene] = createGameWithSceneWithPhysics2SharedData();
+    });
+    it('BehaviorTest should have access to current started and ended contacts in postEvent.', () => {
+      const fps = 2;
+      runtimeGame.setGameResolutionSize(1000, 1000);
+      runtimeScene._timeManager.getElapsedTime = function () {
+        return (1 / fps) * 1000;
+      };
+
+      const staticObject = createObject(runtimeScene, {
+        bodyType: 'Static',
+      });
+      // Creating the object with the other behavior after the Physics2 only one
+      // should make its behavior's post event play after the Physics2 post event.
+      const movingObjectWithOtherBehavior = createObject(runtimeScene);
+      movingObjectWithOtherBehavior.addNewBehavior({
+        name: 'BehaviorTest',
+        type: 'Physics2::BehaviorTest',
+        other: staticObject,
+      });
+      runtimeScene.addObject(movingObjectWithOtherBehavior);
+
+      /** @type {BehaviorTest | null} */
+      const behaviorTest = movingObjectWithOtherBehavior.getBehavior(
+        'BehaviorTest'
+      );
+      if (!behaviorTest) {
+        throw new Error('Test behavior not found, test cannot be run.');
+      }
+
+      staticObject.setPosition(0, 25);
+      movingObjectWithOtherBehavior.setPosition(0, 0);
+      const staticObjectBehavior = staticObject.getBehavior('Physics2');
+      const movingObjectBehavior = movingObjectWithOtherBehavior.getBehavior(
+        'Physics2'
+      );
+      if (!staticObjectBehavior || !movingObjectBehavior) {
+        throw new Error('Behaviors not found, test cannot be run.');
+      }
+
+      movingObjectBehavior.setLinearVelocityY(40000);
+      let hasBounced = false;
+      let stepIndex = 0;
+      behaviorTest.activatePostEvent(true);
+
+      runtimeScene.setEventsFunction(() => {
+        if (movingObjectBehavior.getLinearVelocityY() > 0) {
+          const expectedCollisionTest = {
+            started: false,
+            collision: false,
+            stopped: false,
+          };
+          // If the moving object has a positive velocity, it hasn't bounced
+          // on the static object
+          assertCollision(
+            movingObjectWithOtherBehavior,
+            staticObject,
+            expectedCollisionTest
+          );
+          behaviorTest.setExpectedCollisions(expectedCollisionTest);
+        } else {
+          hasBounced = true;
+          const expectedCollisionTest = {
+            started: true,
+            collision: true,
+            stopped: true,
+          };
+          expect(
+            movingObjectWithOtherBehavior.getY() < staticObject.getY()
+          ).to.be(true);
+          assertCollision(
+            movingObjectWithOtherBehavior,
+            staticObject,
+            expectedCollisionTest
+          );
+          behaviorTest.setExpectedCollisions(expectedCollisionTest);
+        }
+      });
+      while (stepIndex < 10 && !hasBounced) {
+        runtimeScene.renderAndStep(1000 / fps);
+        stepIndex++;
+      }
+
+      // Should be cleared at next step.
+      assertCollision(movingObjectWithOtherBehavior, staticObject, {
+        started: true,
+        collision: true,
+        stopped: true,
+      });
+
+      if (!hasBounced) {
+        throw new Error('Contact did not happen, nothing was tested.');
+      }
+    });
+  });
 });

Extensions/Physics2Behavior/tests/utils.spec.js

@@ -1,108 +0,0 @@
-// @ts-check
-
-describe('computeCurrentContactsFromStartedAndEndedContacts', () => {
-  it('returns same current contacts if nothing happened', () => {
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = [];
-    const endedContacts = [];
-    const expectedResolvedContacts = [...contacts];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns current contacts with started contacts added', () => {
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = ['Z', 'Q'];
-    const endedContacts = [];
-    const expectedResolvedContacts = [...contacts, ...startedContacts];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns current contacts with ended contacts removed', () => {
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = [];
-    const endedContacts = ['A', 'C'];
-    const expectedResolvedContacts = ['B'];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns same current contacts if all started contacts also ended', () => {
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = ['Z', 'X'];
-    const endedContacts = ['Z', 'X'];
-    const expectedResolvedContacts = [...contacts];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns current contacts without started contacts that also ended', () => {
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = ['Z', 'X', 'W'];
-    const endedContacts = ['Z', 'A', 'X'];
-    const expectedResolvedContacts = ['B', 'C', 'W'];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns current contacts with a contact that started and also jittered', () => {
-    // Should handle cases when this happens during the frame:
-    // - contact Z starts
-    // - contact Z ends
-    // - contact Z starts
-    // Contact Z should appear in the current contacts.
-    // We consider a contact shouldn't be able to do that but it should be handled
-    // in case it happens.
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = ['Z', 'Z'];
-    const endedContacts = ['Z'];
-    const expectedResolvedContacts = [...contacts, 'Z'];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-
-  it('returns current contacts without a contact that ended and also jittered', () => {
-    // Should handle cases where contact C was here and, during the frame:
-    // - contact C ends
-    // - contact C starts
-    // - contact C ends
-    // Contact C should not appear in the current contacts
-    // We consider a contact shouldn't be able to do that but it should be handled
-    // in case it happens.
-    const contacts = ['A', 'B', 'C'];
-    const startedContacts = ['C'];
-    const endedContacts = ['C', 'C'];
-    const expectedResolvedContacts = ['A', 'B'];
-    gdjs.physics2.computeCurrentContactsFromStartedAndEndedContacts(
-      contacts,
-      startedContacts,
-      endedContacts
-    );
-    expect(contacts).to.eql(expectedResolvedContacts);
-  });
-});

Extensions/Physics2Behavior/utils.ts

@@ -1,19 +0,0 @@
-namespace gdjs {
-  export namespace physics2 {
-    export const computeCurrentContactsFromStartedAndEndedContacts = <T>(
-      current: Array<T>,
-      started: Array<T>,
-      ended: Array<T>
-    ): void => {
-      started.forEach((startedItem) => {
-        current.push(startedItem);
-      });
-      ended.forEach((endedItem) => {
-        const index = current.indexOf(endedItem);
-        if (index !== -1) {
-          current.splice(index, 1);
-        }
-      });
-    };
-  }
-}

GDJS/tests/karma.conf.js

@@ -75,7 +75,6 @@ module.exports = function (config) {
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/LinkedObjects/linkedobjects.js',
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/Inventory/inventory.js',
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/Inventory/inventorytools.js',
-      '../../newIDE/app/resources/GDJS/Runtime/Extensions/Physics2Behavior/utils.js',
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/Physics2Behavior/box2d.js',
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/Physics2Behavior/physics2runtimebehavior.js',
       '../../newIDE/app/resources/GDJS/Runtime/Extensions/Physics2Behavior/physics2tools.js',