Error: XSLTProcessor() method does not exist in

I have tried to write jasmine unit test cases for a method which contains window.XSLTProcessor() and window.ActiveXObject().

processXmlResponse: function (xml, xsl) {
    var ele = $document[0];
    if (typeof ($window.XSLTProcessor) !== "undefined") {
        // if condition for chrome, firefox and safari
        return something;
    }
    else if ($window.ActiveXObject || "ActiveXObject" in $window) {
        // else if condition for IE
        return something;
    }
}

When iam running below jasmine unit test cases it doesn't get pass through if and else if conditions.

describe('Services: xsltProcessorService', function() {
    var appName = 'appName', testService, result, win, mockBackend;
    beforeEach(mocks.module(appName));
    beforeEach(mocks.inject(function(xsltProcessorService, $httpBackend, $window) {
        testService = xsltProcessorService;
        win = $window;
        spyOn(win, 'XSLTProcessor').and.returnValue('str');
        spyOn(xsltProcessorService, 'processXmlResponse').and.callThrough();
        mockBackend = $httpBackend;
    }));
    it('Ensuring initialization of processXmlResponse services', function() {
        testService.processXmlResponse();
        expect(win.XSLTProcessor).toHaveBeenCalled();
    });
});

It causes following error:

Error: XSLTProcessor() method does not exist

Is there any way to execute if and else if conditions?