zoom-spec.js
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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
ONOS GUI -- SVG -- Zoom Service - Unit Tests
*/
describe('factory: fw/svg/zoom.js', function() {
var $log, fs, zs, svg, zoomLayer, zoomer;
var cz = 'ZoomService.createZoomer(): ',
d3s = ' (D3 selection) property defined';
beforeEach(module('onosUtil', 'onosSvg'));
beforeEach(inject(function (_$log_, FnService, ZoomService) {
$log = _$log_;
fs = FnService;
zs = ZoomService;
svg = d3.select('body').append('svg').attr('id', 'mySvg');
zoomLayer = svg.append('g').attr('id', 'myZoomlayer');
}));
afterEach(function () {
d3.select('#mySvg').remove();
// Note: since zoomLayer is a child of svg, it should be removed also
});
it('should define ZoomService', function () {
expect(zs).toBeDefined();
});
it('should define api functions', function () {
expect(fs.areFunctions(zs, ['createZoomer'])).toBeTruthy();
});
function verifyZoomerApi() {
expect(fs.areFunctions(zoomer, [
'panZoom', 'reset', 'translate', 'scale', 'scaleExtent'
])).toBeTruthy();
}
it('should fail gracefully with no option object', function () {
spyOn($log, 'error');
zoomer = zs.createZoomer();
expect($log.error).toHaveBeenCalledWith(cz + 'No "svg" (svg tag)' + d3s);
expect($log.error).toHaveBeenCalledWith(cz + 'No "zoomLayer" (g tag)' + d3s);
expect(zoomer).toBeNull();
});
it('should complain if we miss required options', function () {
spyOn($log, 'error');
zoomer = zs.createZoomer({});
expect($log.error).toHaveBeenCalledWith(cz + 'No "svg" (svg tag)' + d3s);
expect($log.error).toHaveBeenCalledWith(cz + 'No "zoomLayer" (g tag)' + d3s);
expect(zoomer).toBeNull();
});
it('should work with minimal parameters', function () {
spyOn($log, 'error');
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer
});
expect($log.error).not.toHaveBeenCalled();
verifyZoomerApi();
});
it('should start at scale 1 and translate 0,0', function () {
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer
});
verifyZoomerApi();
expect(zoomer.translate()).toEqual([0,0]);
expect(zoomer.scale()).toEqual(1);
});
it('should allow programmatic pan/zoom', function () {
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer
});
verifyZoomerApi();
expect(zoomer.translate()).toEqual([0,0]);
expect(zoomer.scale()).toEqual(1);
zoomer.panZoom([20,30], 3);
expect(zoomer.translate()).toEqual([20,30]);
expect(zoomer.scale()).toEqual(3);
});
it('should provide default scale extent', function () {
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer
});
expect(zoomer.scaleExtent()).toEqual([0.25, 10]);
});
it('should allow us to override the minimum zoom', function () {
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer,
zoomMin: 1.23
});
expect(zoomer.scaleExtent()).toEqual([1.23, 10]);
});
it('should allow us to override the maximum zoom', function () {
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer,
zoomMax: 13
});
expect(zoomer.scaleExtent()).toEqual([0.25, 13]);
});
// TODO: test zoomed() where we fake out the d3.event.sourceEvent etc...
// need to check default enabled (true) and custom enabled predicate
// need to check that the callback is invoked also
it('should invoke the callback on programmatic pan/zoom', function () {
var foo = { cb: function () {} };
spyOn(foo, 'cb');
zoomer = zs.createZoomer({
svg: svg,
zoomLayer: zoomLayer,
zoomCallback: foo.cb
});
zoomer.panZoom([0,0], 2);
expect(foo.cb).toHaveBeenCalled();
});
});