Renamed components to lib in the JS project, as Ember has components and they mean something different.

test/javascripts/lib/computed_test.js

@@ -0,0 +1,91 @@
+module("Discourse.Computed", {
+  setup: function() {
+    sinon.stub(I18n, "t", function(scope) {
+      return "%@ translated: " + scope;
+    });
+  },
+
+  teardown: function() {
+    I18n.t.restore();
+  }
+});
+
+test("propertyEqual", function() {
+  var t = Em.Object.extend({
+    same: Discourse.computed.propertyEqual('cookies', 'biscuits')
+  }).create({
+    cookies: 10,
+    biscuits: 10
+  });
+
+  ok(t.get('same'), "it is true when the properties are the same");
+  t.set('biscuits', 9);
+  ok(!t.get('same'), "it isn't true when one property is different");
+});
+
+test("propertyNotEqual", function() {
+  var t = Em.Object.extend({
+    diff: Discourse.computed.propertyNotEqual('cookies', 'biscuits')
+  }).create({
+    cookies: 10,
+    biscuits: 10
+  });
+
+  ok(!t.get('diff'), "it isn't true when the properties are the same");
+  t.set('biscuits', 9);
+  ok(t.get('diff'), "it is true when one property is different");
+});
+
+
+test("fmt", function() {
+  var t = Em.Object.extend({
+    exclaimyUsername: Discourse.computed.fmt('username', "!!! %@ !!!"),
+    multiple: Discourse.computed.fmt('username', 'mood', "%@ is %@")
+  }).create({
+    username: 'eviltrout',
+    mood: "happy"
+  });
+
+  equal(t.get('exclaimyUsername'), '!!! eviltrout !!!', "it inserts the string");
+  equal(t.get('multiple'), "eviltrout is happy", "it inserts multiple strings");
+
+  t.set('username', 'codinghorror');
+  equal(t.get('multiple'), "codinghorror is happy", "it supports changing properties");
+  t.set('mood', 'ecstatic');
+  equal(t.get('multiple'), "codinghorror is ecstatic", "it supports changing another property");
+});
+
+
+test("i18n", function() {
+  var t = Em.Object.extend({
+    exclaimyUsername: Discourse.computed.i18n('username', "!!! %@ !!!"),
+    multiple: Discourse.computed.i18n('username', 'mood', "%@ is %@")
+  }).create({
+    username: 'eviltrout',
+    mood: "happy"
+  });
+
+  equal(t.get('exclaimyUsername'), '%@ translated: !!! eviltrout !!!', "it inserts the string and then translates");
+  equal(t.get('multiple'), "%@ translated: eviltrout is happy", "it inserts multiple strings and then translates");
+
+  t.set('username', 'codinghorror');
+  equal(t.get('multiple'), "%@ translated: codinghorror is happy", "it supports changing properties");
+  t.set('mood', 'ecstatic');
+  equal(t.get('multiple'), "%@ translated: codinghorror is ecstatic", "it supports changing another property");
+});
+
+
+test("url", function() {
+  var t, testClass;
+  
+  testClass = Em.Object.extend({
+    userUrl: Discourse.computed.url('username', "/users/%@")
+  });
+
+  t = testClass.create({ username: 'eviltrout' });
+  equal(t.get('userUrl'), "/users/eviltrout", "it supports urls without a prefix");
+
+  Discourse.BaseUri = "/prefixed/";
+  t = testClass.create({ username: 'eviltrout' });
+  equal(t.get('userUrl'), "/prefixed/users/eviltrout", "it supports urls with a prefix");
+});