Pull out animal content into separate files (#7989)

* Pull out animal content into separate files

* Correct variable names

* Add tests for stable, eggs, and hatching potions content

* Add content test back into npm test

test/content/eggs.test.js

@@ -0,0 +1,33 @@
+import {
+  each,
+} from 'lodash';
+import {
+  expectValidTranslationString,
+} from '../helpers/content.helper';
+
+import eggs from '../../common/script/content/eggs';
+
+describe('eggs', ()  => {
+  describe('all', ()  => {
+    it('is a combination of drop and quest eggs', () => {
+      let dropNumber = Object.keys(eggs.drops).length;
+      let questNumber = Object.keys(eggs.quests).length;
+      let allNumber = Object.keys(eggs.all).length;
+
+      expect(allNumber).to.be.greaterThan(0);
+      expect(allNumber).to.equal(dropNumber + questNumber);
+    });
+
+    it('contains basic information about each egg', () => {
+      each(eggs.all, (egg, key) => {
+        expectValidTranslationString(egg.text);
+        expectValidTranslationString(egg.adjective);
+        expectValidTranslationString(egg.mountText);
+        expectValidTranslationString(egg.notes);
+        expect(egg.canBuy).to.be.a('function');
+        expect(egg.value).to.be.a('number');
+        expect(egg.key).to.equal(key);
+      });
+    });
+  });
+});