diff --git a/packages/core/src/components/gesture-controller/gesture-controller-utils.ts b/packages/core/src/components/gesture-controller/gesture-controller-utils.ts
index 0296b1097c..1f0daf4b0e 100644
--- a/packages/core/src/components/gesture-controller/gesture-controller-utils.ts
+++ b/packages/core/src/components/gesture-controller/gesture-controller-utils.ts
@@ -1,11 +1,11 @@
-
+import { GestureController } from "./gesture-controller";
 
 export class GestureDelegate {
-  private ctrl: any|null;
+  private ctrl: GestureController|null;
 
   constructor(
     ctrl: any,
-    private gestureDelegateId: number,
+    private id: number,
     private name: string,
     private priority: number,
     private disableScroll: boolean
@@ -26,7 +26,7 @@ export class GestureDelegate {
       return false;
     }
 
-    return this.ctrl.start(this.name, this.gestureDelegateId, this.priority);
+    return this.ctrl.start(this.name, this.id, this.priority);
   }
 
   capture(): boolean {
@@ -34,9 +34,9 @@ export class GestureDelegate {
       return false;
     }
 
-    const captured = this.ctrl.capture(this.name, this.gestureDelegateId, this.priority);
+    const captured = this.ctrl.capture(this.name, this.id, this.priority);
     if (captured && this.disableScroll) {
-      this.ctrl.disableScroll(this.gestureDelegateId);
+      this.ctrl.disableScroll(this.id);
     }
 
     return captured;
@@ -44,10 +44,10 @@ export class GestureDelegate {
 
   release() {
     if (this.ctrl) {
-      this.ctrl.release(this.gestureDelegateId);
+      this.ctrl.release(this.id);
 
       if (this.disableScroll) {
-        this.ctrl.enableScroll(this.gestureDelegateId);
+        this.ctrl.enableScroll(this.id);
       }
     }
   }
@@ -64,7 +64,7 @@ export class BlockerDelegate {
   private ctrl: any|null;
 
   constructor(
-    private blockerDelegateId: number,
+    private id: number,
     ctrl: any,
     private disable: string[] | undefined,
     private disableScroll: boolean
@@ -78,12 +78,12 @@ export class BlockerDelegate {
     }
     if (this.disable) {
       for (const gesture of this.disable) {
-        this.ctrl.disableGesture(gesture, this.blockerDelegateId);
+        this.ctrl.disableGesture(gesture, this.id);
       }
     }
 
     if (this.disableScroll) {
-      this.ctrl.disableScroll(this.blockerDelegateId);
+      this.ctrl.disableScroll(this.id);
     }
   }
 
@@ -93,11 +93,11 @@ export class BlockerDelegate {
     }
     if (this.disable) {
       for (const gesture of this.disable) {
-        this.ctrl.enableGesture(gesture, this.blockerDelegateId);
+        this.ctrl.enableGesture(gesture, this.id);
       }
     }
     if (this.disableScroll) {
-      this.ctrl.enableScroll(this.blockerDelegateId);
+      this.ctrl.enableScroll(this.id);
     }
   }
 
@@ -107,20 +107,17 @@ export class BlockerDelegate {
   }
 }
 
-
 export interface GestureConfig {
   name: string;
-  priority: number;
-  disableScroll: boolean;
+  priority?: number;
+  disableScroll?: boolean;
 }
 
-
 export interface BlockerConfig {
   disable?: string[];
   disableScroll?: boolean;
 }
 
-
 export const BLOCK_ALL: BlockerConfig = {
   disable: ['menu-swipe', 'goback-swipe'],
   disableScroll: true
diff --git a/packages/core/src/components/gesture-controller/gesture-controller.ts b/packages/core/src/components/gesture-controller/gesture-controller.tsx
similarity index 88%
rename from packages/core/src/components/gesture-controller/gesture-controller.ts
rename to packages/core/src/components/gesture-controller/gesture-controller.tsx
index 266dcdd349..a7eacbd719 100644
--- a/packages/core/src/components/gesture-controller/gesture-controller.ts
+++ b/packages/core/src/components/gesture-controller/gesture-controller.tsx
@@ -17,7 +17,11 @@ export class GestureController {
 
   @Method()
   create(config: GestureConfig): Promise<GestureDelegate> {
-    return Promise.resolve(new GestureDelegate(this, this.newID(), config.name, config.priority, config.disableScroll));
+    return Promise.resolve(new GestureDelegate(
+      this, this.newID(),
+      config.name,
+      config.priority ? config.priority : 0,
+      !!config.disableScroll));
   }
 
   @Method()
@@ -43,14 +47,15 @@ export class GestureController {
     }
     const requestedStart = this.requestedStart;
     let maxPriority = -10000;
-    for (const value of requestedStart.values()) {
+
+    requestedStart.forEach(value => {
       maxPriority = Math.max(maxPriority, value);
-    }
+    });
 
     if (maxPriority === priority) {
       this.capturedId = id;
-      this.requestedStart.clear();
-      this.ionGestureCaptured.emit(gestureName);
+      requestedStart.clear();
+      this.ionGestureCaptured && this.ionGestureCaptured.emit(gestureName);
       return true;
     }
     requestedStart.delete(id);
@@ -120,6 +125,7 @@ export class GestureController {
   }
 
   private newID(): number {
-    return this.gestureId++;
+    this.gestureId++;
+    return this.gestureId;
   }
 }
diff --git a/packages/core/src/components/gesture-controller/test/gesture-controller.spec.tsx b/packages/core/src/components/gesture-controller/test/gesture-controller.spec.tsx
new file mode 100644
index 0000000000..c3e85341ff
--- /dev/null
+++ b/packages/core/src/components/gesture-controller/test/gesture-controller.spec.tsx
@@ -0,0 +1,348 @@
+import { GestureController, } from '../gesture-controller';
+
+describe('gesture controller', () => {
+  it('should create an instance of GestureController', () => {
+    const c = new GestureController();
+    expect(c.isCaptured()).toEqual(false);
+    expect(c.isScrollDisabled()).toEqual(false);
+  });
+
+  it('should test scrolling enable/disable stack', () => {
+    const c = new GestureController();
+    c.enableScroll(1);
+    expect(c.isScrollDisabled()).toEqual(false);
+
+    c.disableScroll(1);
+    expect(c.isScrollDisabled()).toEqual(true);
+    c.disableScroll(1);
+    c.disableScroll(1);
+    expect(c.isScrollDisabled()).toEqual(true);
+
+    c.enableScroll(1);
+    expect(c.isScrollDisabled()).toEqual(false);
+
+    for (let i = 0; i < 100; i++) {
+      for (let j = 0; j < 100; j++) {
+        c.disableScroll(j);
+      }
+    }
+
+    for (let i = 0; i < 100; i++) {
+      expect(c.isScrollDisabled()).toEqual(true);
+      c.enableScroll(50 - i);
+      c.enableScroll(i);
+    }
+    expect(c.isScrollDisabled()).toEqual(false);
+  });
+
+  it('should test gesture enable/disable stack', () => {
+    const c = new GestureController();
+    c.enableGesture('swipe', 1);
+    expect(c.isDisabled('swipe')).toEqual(false);
+
+    c.disableGesture('swipe', 1);
+    expect(c.isDisabled('swipe')).toEqual(true);
+    c.disableGesture('swipe', 1);
+    c.disableGesture('swipe', 1);
+    expect(c.isDisabled('swipe')).toEqual(true);
+
+    c.enableGesture('swipe', 1);
+    expect(c.isDisabled('swipe')).toEqual(false);
+
+    // Disabling gestures multiple times
+    for (let gestureName = 0; gestureName < 10; gestureName++) {
+      for (let i = 0; i < 50; i++) {
+        for (let j = 0; j < 50; j++) {
+          c.disableGesture(gestureName.toString(), j);
+        }
+      }
+    }
+
+    for (let gestureName = 0; gestureName < 10; gestureName++) {
+      for (let i = 0; i < 49; i++) {
+        c.enableGesture(gestureName.toString(), i);
+      }
+      expect(c.isDisabled(gestureName.toString())).toEqual(true);
+      c.enableGesture(gestureName.toString(), 49);
+      expect(c.isDisabled(gestureName.toString())).toEqual(false);
+    }
+  });
+
+
+  it('should test if canStart', () => {
+    const c = new GestureController();
+    expect(c.canStart('event')).toEqual(true);
+    expect(c.canStart('event1')).toEqual(true);
+    expect(c.canStart('event')).toEqual(true);
+    expect(c['requestedStart'].size).toEqual(0);
+    expect(c.isCaptured()).toEqual(false);
+  });
+
+  it('should initialize without options', async () => {
+    const c = new GestureController();
+
+    const g = await c.create({
+      name: 'event',
+    });
+    expect(g['name']).toEqual('event');
+    expect(g['priority']).toEqual(0);
+    expect(g['disableScroll']).toEqual(false);
+    expect(g['ctrl']).toEqual(c);
+    expect(g['id']).toEqual(1);
+
+    const g2 = await c.create({ name: 'event2' });
+    expect(g2['id']).toEqual(2);
+  });
+
+  it('should initialize without options', async () => {
+    const c = new GestureController();
+
+    const g = await c.create({
+      name: 'event',
+    });
+    const g2 = await c.create({
+      name: 'event2',
+    });
+    expect(g['id']).toEqual(1);
+    expect(g2['id']).toEqual(2);
+  });
+
+
+  it('should initialize a delegate with options', async () => {
+    const c = new GestureController();
+    const g = await c.create({
+      name: 'swipe',
+      priority: -123,
+      disableScroll: true,
+    });
+    expect(g['name']).toEqual('swipe');
+    expect(g['priority']).toEqual(-123);
+    expect(g['disableScroll']).toEqual(true);
+    expect(g['ctrl']).toEqual(c);
+    expect(g['id']).toEqual(1);
+  });
+
+  it('should test if several gestures can be started', async () => {
+    const c = new GestureController();
+    const g1 = await c.create({ name: 'swipe' });
+    const g2 = await c.create({name: 'swipe1', priority: 3});
+    const g3 = await c.create({name: 'swipe2', priority: 4});
+
+    for (let i = 0; i < 10; i++) {
+      expect(g1.start()).toEqual(true);
+      expect(g2.start()).toEqual(true);
+      expect(g3.start()).toEqual(true);
+    }
+    const expected = new Map();
+    expected.set(1, 0);
+    expected.set(2, 3);
+    expected.set(3, 4);
+    expect(c['requestedStart']).toEqual(expected);
+
+    g1.release();
+    g1.release();
+
+    const expected2 = new Map();
+    expected2.set(2, 3);
+    expected2.set(3, 4);
+    expect(c['requestedStart']).toEqual(expected2);
+
+    expect(g1.start()).toEqual(true);
+    expect(g2.start()).toEqual(true);
+    g3.destroy();
+    expect(g3['ctrl']).toBeNull();
+
+    const expected3 = new Map();
+    expected3.set(1, 0);
+    expected3.set(2, 3);
+    expect(c['requestedStart']).toEqual(expected3);
+  });
+
+
+  it('should test if several gestures try to capture at the same time', async () => {
+    const c = new GestureController();
+    const g1 = await c.create({name: 'swipe1'});
+    const g2 = await c.create({name: 'swipe2', priority: 2 });
+    const g3 = await c.create({name: 'swipe3', priority: 3 });
+    const g4 = await c.create({name: 'swipe4', priority: 4 });
+    const g5 = await c.create({name: 'swipe5', priority: 5 });
+
+    // Low priority capture() returns false
+    expect(g2.start()).toEqual(true);
+    expect(g3.start()).toEqual(true);
+    expect(g1.capture()).toEqual(false);
+
+    const expected = new Map();
+    expected.set(2, 2);
+    expected.set(3, 3);
+    expect(c['requestedStart']).toEqual(expected);
+
+    // Low priority start() + capture() returns false
+    expect(g2.capture()).toEqual(false);
+
+    const expected2 = new Map();
+    expected2.set(3, 3);
+    expect(c['requestedStart']).toEqual(expected2);
+
+    // Higher priority capture() return true
+    expect(g4.capture()).toEqual(true);
+
+    expect(c.isScrollDisabled()).toEqual(false);
+    expect(c.isCaptured()).toEqual(true);
+    expect(c['requestedStart']).toEqual(new Map());
+
+    // Higher priority can not capture because it is already capture
+    expect(g5.capture()).toEqual(false);
+    expect(g5.canStart()).toEqual(false);
+    expect(g5.start()).toEqual(false);
+    expect(c['requestedStart']).toEqual(new Map());
+
+    // Only captured gesture can release
+    g1.release();
+    g2.release();
+    g3.release();
+    g5.release();
+    expect(c.isCaptured()).toEqual(true);
+
+    // G4 releases
+    g4.release();
+    expect(c.isCaptured()).toEqual(false);
+
+    // Once it was release, any gesture can capture
+    expect(g1.start()).toEqual(true);
+    expect(g1.capture()).toEqual(true);
+  });
+
+  it('should disable scrolling on capture', async () => {
+    const c = new GestureController();
+    const g = await c.create({
+      name: 'goback',
+      disableScroll: true,
+    });
+    const g1 = await c.create({ name: 'swipe' });
+
+    g.start();
+    expect(c.isScrollDisabled()).toEqual(false);
+
+    g1.capture();
+    g.capture();
+    expect(c.isScrollDisabled()).toEqual(false);
+
+    g1.release();
+    expect(c.isScrollDisabled()).toEqual(false);
+
+    g.capture();
+    expect(c.isScrollDisabled()).toEqual(true);
+
+    g.destroy();
+    expect(c.isScrollDisabled()).toEqual(false);
+  });
+
+  describe('BlockerDelegate', () => {
+    it('create one', async () => {
+      const c = new GestureController();
+      const b = await c.createBlocker({
+        disableScroll: true,
+        disable: ['event1', 'event2', 'event3', 'event4']
+      });
+
+      expect(b['disable']).toEqual(['event1', 'event2', 'event3', 'event4']);
+      expect(b['disableScroll']).toEqual(true);
+      expect(b['ctrl']).toEqual(c);
+      expect(b['id']).toEqual(1);
+
+      const b2 = await c.createBlocker({
+        disable: ['event2', 'event3', 'event4', 'event5']
+      });
+
+      expect(b2['disable']).toEqual(['event2', 'event3', 'event4', 'event5']);
+      expect(b2['disableScroll']).toEqual(false);
+      expect(b2['ctrl']).toEqual(c);
+      expect(b2['id']).toEqual(2);
+
+
+      expect(c.isDisabled('event1')).toBeFalsy();
+      expect(c.isDisabled('event2')).toBeFalsy();
+      expect(c.isDisabled('event3')).toBeFalsy();
+      expect(c.isDisabled('event4')).toBeFalsy();
+      expect(c.isDisabled('event5')).toBeFalsy();
+
+      b.block();
+      b.block();
+
+      expect(c.isDisabled('event1')).toBeTruthy();
+      expect(c.isDisabled('event2')).toBeTruthy();
+      expect(c.isDisabled('event3')).toBeTruthy();
+      expect(c.isDisabled('event4')).toBeTruthy();
+      expect(c.isDisabled('event5')).toBeFalsy();
+
+      b2.block();
+      b2.block();
+      b2.block();
+
+      expect(c.isDisabled('event1')).toBeTruthy();
+      expect(c.isDisabled('event2')).toBeTruthy();
+      expect(c.isDisabled('event3')).toBeTruthy();
+      expect(c.isDisabled('event4')).toBeTruthy();
+      expect(c.isDisabled('event5')).toBeTruthy();
+
+      b.unblock();
+
+      expect(c.isDisabled('event1')).toBeFalsy();
+      expect(c.isDisabled('event2')).toBeTruthy();
+      expect(c.isDisabled('event3')).toBeTruthy();
+      expect(c.isDisabled('event4')).toBeTruthy();
+      expect(c.isDisabled('event5')).toBeTruthy();
+
+      b2.destroy();
+      expect(b2['ctrl']).toBeNull();
+
+      expect(c.isDisabled('event1')).toBeFalsy();
+      expect(c.isDisabled('event2')).toBeFalsy();
+      expect(c.isDisabled('event3')).toBeFalsy();
+      expect(c.isDisabled('event4')).toBeFalsy();
+      expect(c.isDisabled('event5')).toBeFalsy();
+    });
+
+
+    it('should disable some events', async () => {
+      const c = new GestureController();
+
+      const goback = await c.create({ name: 'goback' });
+      expect(goback.canStart()).toEqual(true);
+
+      const g2 = await c.create({ name: 'goback2' });
+      expect(g2.canStart()).toEqual(true);
+
+      const g3 = await c.createBlocker({
+        disable: ['range', 'goback', 'something']
+      });
+
+      const g4 = await c.createBlocker({
+        disable: ['range']
+      });
+
+      g3.block();
+      g4.block();
+
+      // goback is disabled
+      expect(c.isDisabled('range')).toEqual(true);
+      expect(c.isDisabled('goback')).toEqual(true);
+      expect(c.isDisabled('something')).toEqual(true);
+      expect(c.isDisabled('goback2')).toEqual(false);
+      expect(goback.canStart()).toEqual(false);
+      expect(goback.start()).toEqual(false);
+      expect(goback.capture()).toEqual(false);
+
+      // Once g3 is destroyed, goback and something should be enabled
+      g3.destroy();
+      expect(c.isDisabled('range')).toEqual(true);
+      expect(c.isDisabled('goback')).toEqual(false);
+      expect(c.isDisabled('something')).toEqual(false);
+
+      // Once g4 is destroyed, range is also enabled
+      g4.unblock();
+      expect(c.isDisabled('range')).toEqual(false);
+    });
+  });
+});