Merge pull request #1472 from velesin/model_tests

adds unit tests for Discourse.Model

test/javascripts/models/model_test.js

@@ -0,0 +1,51 @@
+module("Discourse.Model");
+
+test("mixes in Discourse.Presence", function() {
+  ok(Discourse.Presence.detect(Discourse.Model.create()));
+});
+
+test("mergeAttributes: merges attributes from another object", function() {
+  var model = Discourse.Model.create({
+    foo: "foo",
+    bar: "original bar"
+  });
+
+  model.mergeAttributes({
+    bar: "merged bar",
+    baz: "baz"
+  });
+
+  equal(model.get("foo"), "foo", "leaving original attr intact when only original object contains given key");
+  equal(model.get("bar"), "merged bar", "overwriting original attr when both objects contain given key");
+  equal(model.get("baz"), "baz", "adding new attr to original object when only merged object contains given key");
+});
+
+test("mergeAttributes: respects Ember setters (so observers etc. work)", function() {
+  var observerHasFired = false;
+
+  var model = Discourse.Model.create({foo: "original foo"});
+  model.addObserver("foo", function() {
+    observerHasFired = true;
+  });
+  model.mergeAttributes({foo: "merged foo"});
+
+  ok(observerHasFired);
+});
+
+test("extractByKey: converts a list of hashes into a hash of instances of specified class, indexed by their ids", function() {
+  var firstObject = {id: "id_1", foo: "foo_1"};
+  var secondObject = {id: "id_2", foo: "foo_2"};
+
+  var actual = Discourse.Model.extractByKey([firstObject, secondObject], Ember.Object);
+  var expected = {
+    id_1: Ember.Object.create(firstObject),
+    id_2: Ember.Object.create(secondObject)
+  };
+
+  ok(_.isEqual(actual, expected));
+});
+
+test("extractByKey: returns an empty hash if there isn't anything to convert", function() {
+  deepEqual(Discourse.Model.extractByKey(), {}, "when called without parameters");
+  deepEqual(Discourse.Model.extractByKey([]), {}, "when called with an empty array");
+});