133 lines
4.2 KiB
JavaScript
133 lines
4.2 KiB
JavaScript
goog.provide('ol.test.ImageTile');
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goog.require('ol.ImageTile');
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goog.require('ol.Tile');
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goog.require('ol.events');
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goog.require('ol.events.EventType');
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goog.require('ol.source.Image');
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describe('ol.ImageTile', function() {
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describe('#load()', function() {
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it('can load idle tile', function(done) {
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var tileCoord = [0, 0, 0];
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var state = ol.Tile.State.IDLE;
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var src = 'spec/ol/data/osm-0-0-0.png';
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var tileLoadFunction = ol.source.Image.defaultImageLoadFunction;
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var tile = new ol.ImageTile(tileCoord, state, src, null, tileLoadFunction);
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var previousState = tile.getState();
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ol.events.listen(tile, ol.events.EventType.CHANGE, function(event) {
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var state = tile.getState();
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if (previousState == ol.Tile.State.IDLE) {
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expect(state).to.be(ol.Tile.State.LOADING);
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} else if (previousState == ol.Tile.State.LOADING) {
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expect(state).to.be(ol.Tile.State.LOADED);
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done();
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} else {
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expect().fail();
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}
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previousState = state;
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});
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tile.load();
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});
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it('can load error tile', function(done) {
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var tileCoord = [0, 0, 0];
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var state = ol.Tile.State.ERROR;
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var src = 'spec/ol/data/osm-0-0-0.png';
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var tileLoadFunction = ol.source.Image.defaultImageLoadFunction;
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var tile = new ol.ImageTile(tileCoord, state, src, null, tileLoadFunction);
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var previousState = tile.getState();
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ol.events.listen(tile, ol.events.EventType.CHANGE, function(event) {
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var state = tile.getState();
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if (previousState == ol.Tile.State.ERROR) {
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expect(state).to.be(ol.Tile.State.LOADING);
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} else if (previousState == ol.Tile.State.LOADING) {
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expect(state).to.be(ol.Tile.State.LOADED);
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done();
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} else {
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expect().fail();
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}
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previousState = state;
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});
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tile.load();
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});
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});
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describe('interimChain', function() {
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var head, renderTile;
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beforeEach(function() {
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var tileCoord = [0, 0, 0];
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var src = 'spec/ol/data/osm-0-0-0.png';
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var tileLoadFunction = ol.source.Image.defaultImageLoadFunction;
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head = new ol.ImageTile(tileCoord, ol.Tile.State.IDLE, src, null, tileLoadFunction);
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ol.getUid(head);
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var addToChain = function(tile, state) {
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var next = new ol.ImageTile(tileCoord, state, src, null, tileLoadFunction);
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ol.getUid(next);
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tile.interimTile = next;
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return next;
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};
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var tail = addToChain(head,ol.Tile.State.IDLE); //discard, deprecated by head
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tail = addToChain(tail,ol.Tile.State.LOADING); //keep, request already going
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tail = addToChain(tail,ol.Tile.State.IDLE); //discard, deprecated by head
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tail = addToChain(tail,ol.Tile.State.LOADED); //keep, use for rendering
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renderTile = tail; //store this tile for later tests
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tail = addToChain(tail,ol.Tile.State.IDLE); //rest of list outdated by tile above
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tail = addToChain(tail,ol.Tile.State.LOADED);
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tail = addToChain(tail,ol.Tile.State.LOADING);
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tail = addToChain(tail,ol.Tile.State.LOADED);
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});
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it('shrinks tile chain correctly', function(done) {
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var chainLength = function(tile) {
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var c = 0;
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while (tile) {
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++c;
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tile = tile.interimTile;
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}
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return c;
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};
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expect(chainLength(head)).to.be(9);
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head.refreshInterimChain();
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expect(chainLength(head)).to.be(3);
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done();
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});
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it('gives the right tile to render', function(done) {
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expect(head.getInterimTile()).to.be(renderTile);
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head.refreshInterimChain();
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expect(head.getInterimTile()).to.be(renderTile);
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done();
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});
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it('discards everything after the render tile', function(done) {
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head.refreshInterimChain();
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expect(renderTile.interimTile).to.be(null);
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done();
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});
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it('preserves order of tiles', function(done) {
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head.refreshInterimChain();
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while (head.interimTile !== null) {
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//use property of ol.getUid returning increasing id's.
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expect(ol.getUid(head) < ol.getUid(head.interimTile));
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head = head.interimTile;
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}
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done();
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});
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});
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});
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