Implement mocks for google.maps.geometry

[plgagnon2]

describe('given xxx.service.tsx', () => {
    beforeEach(() => {
        initialize();
    });
    describe('when I xxx', () => {
        it('should yyy', () => {
            const xxxspy = jest.spyOn(google.maps.geometry.spherical, 'computeLength').mockReturnValue(1);

            const distance = xxx.getDistance(params)
            expect(distance).toEqual(yyy)

            xxxspy.mockRestore();
        });
    });
});