Ported release mounts, add unit tests, added release mounts route with integration tests

test/api/v3/integration/user/POST-user_release_mounts.test.js

@@ -0,0 +1,42 @@
+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-integration/v3';
+
+describe('POST /user/release-mounts', () => {
+  let user;
+  let animal = 'Wolf-Base';
+
+  beforeEach(async () => {
+    user = await generateUser({
+      'items.currentMount': animal,
+      'items.mounts': {animal: true},
+    });
+  });
+
+  it('returns an error when user balance is too low', async () => {
+    await expect(user.post('/user/release-mounts'))
+      .to.eventually.be.rejected.and.to.eql({
+        code: 401,
+        error: 'NotAuthorized',
+        message: t('notEnoughGems'),
+      });
+  });
+
+  // More tests in common code unit tests
+
+  it('releases mounts', async () => {
+    await user.update({
+      balance: 1,
+    });
+
+    let response = await user.post('/user/release-mounts');
+    await user.sync();
+
+    expect(response.message).to.equal(t('mountsReleased'));
+    expect(user.balance).to.equal(0);
+    expect(user.items.currentMount).to.be.empty;
+    expect(user.items.mounts[animal]).to.equal(null);
+    expect(user.achievements.mountMasterCount).to.equal(1);
+  });
+});