How to use the hammerjs.MouseInput function in hammerjs

it("should check convertHammerInputType when not supporting touch", () => {
      // Given
      const MockHammerInput = HammerInputInjector({
        "../const": {
          SUPPORT_TOUCH : false
        }
      }).HammerInput;

      // When
      let inputType = [ "touch", "mouse" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.equal(Hammer.MouseInput);

      // When
      inputType = [ "touch" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.null;

      // When
      inputType = [ "mouse" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.equal(Hammer.MouseInput);

      // When
      inputType = [ ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.null;
    });

}).HammerInput;
      
			// When
      let inputType = [ "touch", "mouse" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.equal(Hammer.TouchInput);

      // When
      inputType = [ "touch" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.equal(Hammer.TouchInput);

      // When
      inputType = [ "mouse" ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.equal(Hammer.MouseInput);

      // When
      inputType = [ ];
      // Then
      expect(MockHammerInput.convertHammerInputType(inputType)).to.be.null;
    });

Hammer.inherit(PointerInput, Hammer.PointerEventInput, {});
PointerInput.prototype.constructor = function() { }; // STUB, avoids init() being called too early

var MOUSE_ELEMENT_EVENTS = 'mousedown';
var MOUSE_WINDOW_EVENTS = 'mousemove mouseup';

function MouseInput() {
  // OVERRIDE: listen for all event on the element, not on window
  // This is needed for event propagation to get the right targets
  this.evEl = MOUSE_ELEMENT_EVENTS + ' ' + MOUSE_WINDOW_EVENTS;
  this.evWin = '';

  this.pressed = false; // mousedown state
  Hammer.Input.apply(this, arguments);
}
Hammer.inherit(MouseInput, Hammer.MouseInput, {});
MouseInput.prototype.constructor = function() { }; // STUB, avoids overridden constructor being called

function TouchMouseInput() {
    Hammer.Input.apply(this, arguments);

    var handler = this.handler.bind(this);
    this.touch = new Hammer.TouchInput(this.manager, handler);
    this.mouse = new MouseInput(this.manager, handler);

    this.primaryTouch = null;
    this.lastTouches = [];
}
Hammer.inherit(TouchMouseInput, Hammer.TouchMouseInput, {});
TouchMouseInput.prototype.constructor = function() { }; // STUB, avoids overridden constructor being called

var Input = null;

hasTouch = exports.SUPPORT_TOUCH;
                break;
            case "pointer": hasPointer = exports.SUPPORT_POINTER_EVENTS;
        }
    });
    if (hasPointer) {
        return Hammer.PointerEventInput;
    }
    else if (hasTouch && hasMouse) {
        return Hammer.TouchMouseInput;
    }
    else if (hasTouch) {
        return Hammer.TouchInput;
    }
    else if (hasMouse) {
        return Hammer.MouseInput;
    }
    return null;
}
exports.convertInputType = convertInputType;