Update ol.Projection

2012-07-06 12:16:02 +02:00
parent c56fce2be8
commit 89ec9bf07a
5 changed files with 456 additions and 258 deletions
@@ -0,0 +1,87 @@
+goog.require('goog.array');
+goog.require('goog.math.Coordinate');
+goog.require('goog.testing.jsunit');
+goog.require('ol.Projection');
+
+
+function _testAllEquivalent(codes) {
+  var projections = goog.array.map(codes, ol.Projection.createFromCode);
+  goog.array.forEach(projections, function(source) {
+    goog.array.forEach(projections, function(destination) {
+      assertTrue(ol.Projection.equivalent(source, destination));
+    });
+  });
+}
+
+
+function testEpsg3857Equivalence() {
+  _testAllEquivalent([
+    'EPSG:3857',
+    'EPSG:102100',
+    'EPSG:102113',
+    'EPSG:900913'
+  ]);
+}
+
+
+function testEpsg4326Equivalence() {
+  _testAllEquivalent([
+    'CRS:84',
+    'urn:ogc:def:crs:EPSG:6.6:4326',
+    'EPSG:4326'
+  ]);
+}
+
+
+function testIdentityTransform() {
+  var epsg4326 = ol.Projection.createFromCode('EPSG:4326');
+  var uniqueObject = {};
+  var sourcePoint = new goog.math.Coordinate(uniqueObject, uniqueObject);
+  var destinationPoint = ol.Projection.transform(
+      sourcePoint, epsg4326, epsg4326);
+  assertFalse(sourcePoint === destinationPoint);
+  assertTrue(destinationPoint.x === sourcePoint.x);
+  assertTrue(destinationPoint.y === sourcePoint.y);
+}
+
+
+function testForwardSphericalMercatorOrigin() {
+  var point = ol.Projection.transformWithCodes(
+      new goog.math.Coordinate(0, 0), 'EPSG:4326', 'EPSG:3857');
+  assertNotNullNorUndefined(point);
+  assertEquals(0, point.x);
+  assertRoughlyEquals(0, point.y, 1e-9);
+}
+
+
+function testInverseSphericalMercatorOrigin() {
+  var point = ol.Projection.transformWithCodes(
+      new goog.math.Coordinate(0, 0), 'EPSG:3857', 'EPSG:4326');
+  assertNotNullNorUndefined(point);
+  assertEquals(0, point.x);
+  assertEquals(0, point.y);
+}
+
+
+function testForwardSphericalMercatorAlastaira() {
+  // http://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/
+  var point = ol.Projection.transformWithCodes(
+      new goog.math.Coordinate(-5.625, 52.4827802220782),
+      'EPSG:4326',
+      'EPSG:900913');
+  assertNotNullNorUndefined(point);
+  assertRoughlyEquals(-626172.13571216376, point.x, 1e-9);
+  assertRoughlyEquals(6887893.4928337997, point.y, 1e-9);
+}
+
+
+function testInverseSphericalMercatorAlastaira() {
+  // http://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/
+  var point = ol.Projection.transformWithCodes(
+      new goog.math.Coordinate(-626172.13571216376, 6887893.4928337997),
+      'EPSG:900913',
+      'EPSG:4326');
+  assertNotNullNorUndefined(point);
+  assertRoughlyEquals(-5.625, point.x, 1e-9);
+  assertRoughlyEquals(52.4827802220782, point.y, 1e-9);
+}