Gem-ize jasmine

[Finishes #13128217]

lib/jasmine-core/example/src/Player.js

@@ -0,0 +1,22 @@
+function Player() {
+}
+Player.prototype.play = function(song) {
+  this.currentlyPlayingSong = song;
+  this.isPlaying = true;
+};
+
+Player.prototype.pause = function() {
+  this.isPlaying = false;
+};
+
+Player.prototype.resume = function() {
+  if (this.isPlaying) {
+    throw new Error("song is already playing");
+  }
+
+  this.isPlaying = true;
+};
+
+Player.prototype.makeFavorite = function() {
+  this.currentlyPlayingSong.persistFavoriteStatus(true);
+};

lib/jasmine-core/example/src/Song.js

@@ -0,0 +1,7 @@
+function Song() {
+}
+
+Song.prototype.persistFavoriteStatus = function(value) {
+  // something complicated
+  throw new Error("not yet implemented");
+};