Add tests for ol.reproj.*

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

@@ -0,0 +1,45 @@
+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');