Add tests for ol.reproj.*

test/spec/ol/reproj/image.test.js

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+goog.provide('ol.test.reproj.Image');
+
+describe('ol.reproj.Image', function() {
+  function createImage(pixelRatio) {
+    return new ol.reproj.Image(
+        ol.proj.get('EPSG:3857'), ol.proj.get('EPSG:4326'),
+        [-180, -85, 180, 85], 10, pixelRatio,
+        function(extent, resolution, pixelRatio) {
+          return new ol.Image(extent, resolution, pixelRatio, [],
+              'data:image/gif;base64,R0lGODlhAQABAAAAACwAAAAAAQABAAA=', '',
+              function(image, src) {
+                image.getImage().src = src;
+              });
+        });
+  }
+
+  it('changes state as expected', function(done) {
+    var image = createImage(1);
+    expect(image.getState()).to.be(ol.ImageState.IDLE);
+    image.listen('change', function() {
+      if (image.getState() == ol.ImageState.LOADED) {
+        done();
+      }
+    });
+    image.load();
+  });
+
+  it('returns correct canvas size', function(done) {
+    var image = createImage(1);
+    image.listen('change', function() {
+      if (image.getState() == ol.ImageState.LOADED) {
+        var canvas = image.getImage();
+        expect(canvas.width).to.be(36);
+        expect(canvas.height).to.be(17);
+        done();
+      }
+    });
+    image.load();
+  });
+
+  it('respects pixelRatio', function(done) {
+    var image = createImage(2);
+    image.listen('change', function() {
+      if (image.getState() == ol.ImageState.LOADED) {
+        var canvas = image.getImage();
+        expect(canvas.width).to.be(72);
+        expect(canvas.height).to.be(34);
+        done();
+      }
+    });
+    image.load();
+  });
+});
+
+
+goog.require('ol.Image');
+goog.require('ol.ImageState');
+goog.require('ol.proj');
+goog.require('ol.reproj.Image');

test/spec/ol/reproj/reproj.test.js

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+goog.provide('ol.test.reproj');
+
+describe('ol.reproj', function() {
+
+  describe('#calculateSourceResolution', function() {
+    var proj3857 = ol.proj.get('EPSG:3857');
+    var proj4326 = ol.proj.get('EPSG:4326');
+    var origin = [0, 0];
+    var point3857 = [50, 40];
+    var point4326 = ol.proj.transform(point3857, proj3857, proj4326);
+
+    it('is identity for identical projection', function() {
+      var result;
+      var resolution = 500;
+      result = ol.reproj.calculateSourceResolution(
+          proj3857, proj3857, origin, resolution);
+      expect(result).to.be(resolution);
+
+      result = ol.reproj.calculateSourceResolution(
+          proj3857, proj3857, point3857, resolution);
+      expect(result).to.be(resolution);
+
+      result = ol.reproj.calculateSourceResolution(
+          proj4326, proj4326, point4326, resolution);
+      expect(result).to.be(resolution);
+    });
+
+    it('calculates correctly', function() {
+      var resolution4326 = 5;
+
+      var resolution3857 = ol.reproj.calculateSourceResolution(
+          proj3857, proj4326, point4326, resolution4326);
+      expect(resolution3857).not.to.be(resolution4326);
+      expect(resolution3857).to.roughlyEqual(555974.3714343394, 1e-6);
+
+      var result = ol.reproj.calculateSourceResolution(
+          proj4326, proj3857, point3857, resolution3857);
+      expect(result).to.be(resolution4326);
+    });
+  });
+});
+
+
+goog.require('ol.reproj');
+goog.require('ol.proj');

test/spec/ol/reproj/tile.test.js

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+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');

test/spec/ol/reproj/triangulation.test.js

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+goog.provide('ol.test.reproj.Triangulation');
+
+describe('ol.reproj.Triangulation', 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'];
+  });
+
+  describe('constructor', function() {
+    it('is trivial for identity', function() {
+      var proj4326 = ol.proj.get('EPSG:4326');
+      var triangulation = new ol.reproj.Triangulation(proj4326, proj4326,
+          [20, 20, 30, 30], [-180, -90, 180, 90], 0);
+      expect(triangulation.getTriangles().length).to.be(2);
+    });
+
+    it('is empty when outside source extent', function() {
+      var proj4326 = ol.proj.get('EPSG:4326');
+      var proj27700 = ol.proj.get('EPSG:27700');
+      var triangulation = new ol.reproj.Triangulation(proj27700, proj4326,
+          [0, 0, 10, 10], proj27700.getExtent(), 0);
+      expect(triangulation.getTriangles().length).to.be(0);
+    });
+
+    it('can handle null source extent', function() {
+      var proj4326 = ol.proj.get('EPSG:4326');
+      var triangulation = new ol.reproj.Triangulation(proj4326, proj4326,
+          [20, 20, 30, 30], null, 0);
+      expect(triangulation.getTriangles().length).to.be(2);
+    });
+
+    it('can handle wrapX in source', function() {
+      proj4.defs('merc_180', '+proj=merc +lon_0=180 +units=m +no_defs');
+      var proj_ = ol.proj.get('merc_180');
+      proj_.setExtent([-20026376.39, -20048966.10, 20026376.39, 20048966.10]);
+
+      var proj4326 = ol.proj.get('EPSG:4326');
+      var triangulation = new ol.reproj.Triangulation(proj4326, proj_,
+          proj_.getExtent(), [-180, -90, 180, 90], 0);
+      expect(triangulation.getWrapsXInSource()).to.be(true);
+      var triExtent = triangulation.calculateSourceExtent();
+      expect(triExtent[2] < triExtent[0]).to.be(true);
+    });
+
+  });
+});
+
+
+goog.require('ol.proj');
+goog.require('ol.reproj.Triangulation');