Ported unlock. Add unit tests. Create unlock route. Add integration tests

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

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+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-integration/v3';
+
+describe('POST /user/unlock', () => {
+  let user;
+  let unlockPath = 'shirt.convict,shirt.cross,shirt.fire,shirt.horizon,shirt.ocean,shirt.purple,shirt.rainbow,shirt.redblue,shirt.thunder,shirt.tropical,shirt.zombie';
+  let unlockCost = 1.25;
+  let usersStartingGems = 5;
+
+  beforeEach(async () => {
+    user = await generateUser();
+  });
+
+  it('returns an error when user balance is too low', async () => {
+    await expect(user.post(`/user/unlock?path=${unlockPath}`))
+      .to.eventually.be.rejected.and.to.eql({
+        code: 401,
+        error: 'NotAuthorized',
+        message: t('notEnoughGems'),
+      });
+  });
+
+  // More tests in common code unit tests
+
+  it('reduces a user\'s balance', async () => {
+    await user.update({
+      balance: usersStartingGems,
+    });
+    let response = await user.post(`/user/unlock?path=${unlockPath}`);
+    await user.sync();
+
+    expect(response.message).to.equal(t('unlocked'));
+    expect(user.balance).to.equal(usersStartingGems - unlockCost);
+  });
+});