Add tests for ol.reproj.*

2015-07-20 16:30:30 +02:00
parent 0c48a560b2
commit c899100dab
4 changed files with 261 additions and 0 deletions
--- a/test/spec/ol/reproj/tile.test.js
+++ b/test/spec/ol/reproj/tile.test.js
@@ -0,0 +1,99 @@
+goog.provide('ol.test.reproj.Tile');
+
+describe('ol.reproj.Tile', function() {
+  beforeEach(function() {
+    proj4.defs('EPSG:27700', '+proj=tmerc +lat_0=49 +lon_0=-2 ' +
+        '+k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy ' +
+        '+towgs84=446.448,-125.157,542.06,0.15,0.247,0.842,-20.489 ' +
+        '+units=m +no_defs');
+    var proj27700 = ol.proj.get('EPSG:27700');
+    proj27700.setExtent([0, 0, 700000, 1300000]);
+  });
+
+  afterEach(function() {
+    delete proj4.defs['EPSG:27700'];
+  });
+
+
+  function createTile(pixelRatio, opt_tileSize) {
+    var proj4326 = ol.proj.get('EPSG:4326');
+    var proj3857 = ol.proj.get('EPSG:3857');
+    return new ol.reproj.Tile(
+        proj3857, ol.tilegrid.createForProjection(proj3857), proj4326,
+        ol.tilegrid.createForProjection(proj4326, 3, opt_tileSize),
+        3, 2, -2, pixelRatio, function(z, x, y, pixelRatio) {
+          return new ol.ImageTile([z, x, y], ol.TileState.IDLE,
+              'data:image/gif;base64,R0lGODlhAQABAAAAACwAAAAAAQABAAA=', '',
+              function(tile, src) {
+                tile.getImage().src = src;
+              });
+        });
+  }
+
+  it('changes state as expected', function(done) {
+    var tile = createTile(1);
+    expect(tile.getState()).to.be(ol.TileState.IDLE);
+    tile.listen('change', function() {
+      if (tile.getState() == ol.TileState.LOADED) {
+        done();
+      }
+    });
+    tile.load();
+  });
+
+  it('is empty when outside target tile grid', function() {
+    var proj4326 = ol.proj.get('EPSG:4326');
+    var proj3857 = ol.proj.get('EPSG:3857');
+    var tile = new ol.reproj.Tile(
+        proj3857, ol.tilegrid.createForProjection(proj3857),
+        proj4326, ol.tilegrid.createForProjection(proj4326),
+        0, -1, 0, 1, function() {
+          expect().fail('No tiles should be required');
+        });
+    expect(tile.getState()).to.be(ol.TileState.EMPTY);
+  });
+
+  it('is empty when outside source tile grid', function() {
+    var proj4326 = ol.proj.get('EPSG:4326');
+    var proj27700 = ol.proj.get('EPSG:27700');
+    var tile = new ol.reproj.Tile(
+        proj27700, ol.tilegrid.createForProjection(proj27700),
+        proj4326, ol.tilegrid.createForProjection(proj4326),
+        3, 2, -2, 1, function() {
+          expect().fail('No tiles should be required');
+        });
+    expect(tile.getState()).to.be(ol.TileState.EMPTY);
+  });
+
+  it('respects tile size of target tile grid', function(done) {
+    var tile = createTile(1, [100, 40]);
+    tile.listen('change', function() {
+      if (tile.getState() == ol.TileState.LOADED) {
+        var canvas = tile.getImage();
+        expect(canvas.width).to.be(100);
+        expect(canvas.height).to.be(40);
+        done();
+      }
+    });
+    tile.load();
+  });
+
+  it('respects pixelRatio', function(done) {
+    var tile = createTile(3, [60, 20]);
+    tile.listen('change', function() {
+      if (tile.getState() == ol.TileState.LOADED) {
+        var canvas = tile.getImage();
+        expect(canvas.width).to.be(180);
+        expect(canvas.height).to.be(60);
+        done();
+      }
+    });
+    tile.load();
+  });
+});
+
+
+goog.require('ol.ImageTile');
+goog.require('ol.TileState');
+goog.require('ol.proj');
+goog.require('ol.reproj.Tile');