Introduce real Entity subclasses

test/spec/graph/node.js

@@ -0,0 +1,33 @@
+describe('iD.Node', function () {
+    it("returns a node", function () {
+        expect(iD.Node()).to.be.an.instanceOf(iD.Node);
+        expect(iD.Node().type).to.equal("node");
+    });
+
+    it("returns a created Entity if no ID is specified", function () {
+        expect(iD.Node().created()).to.be.ok;
+    });
+
+    it("returns an unmodified Entity if ID is specified", function () {
+        expect(iD.Node({id: 'n1234'}).created()).not.to.be.ok;
+        expect(iD.Node({id: 'n1234'}).modified()).not.to.be.ok;
+    });
+
+    it("defaults tags to an empty object", function () {
+        expect(iD.Node().tags).to.eql({});
+    });
+
+    it("sets tags as specified", function () {
+        expect(iD.Node({tags: {foo: 'bar'}}).tags).to.eql({foo: 'bar'});
+    });
+
+    describe("#intersects", function () {
+        it("returns true for a node within the given extent", function () {
+            expect(iD.Node({loc: [0, 0]}).intersects([[-180, 90], [180, -90]])).to.equal(true);
+        });
+
+        it("returns false for a node outside the given extend", function () {
+            expect(iD.Node({loc: [0, 0]}).intersects([[100, 90], [180, -90]])).to.equal(false);
+        });
+    });
+});