Ported sell function. Add unit tests. Create sell route. Add integration tests

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

@@ -0,0 +1,42 @@
+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-integration/v3';
+import content from '../../../../../common/script/content';
+
+describe('POST /user/sell/:type/:key', () => {
+  let user;
+  let type = 'eggs';
+  let key = 'Wolf';
+
+  beforeEach(async () => {
+    user = await generateUser();
+  });
+
+  // More tests in common code unit tests
+
+  it('returns an error when user does not have item', async () => {
+    await expect(user.post(`/user/sell/${type}/${key}`))
+      .to.eventually.be.rejected.and.eql({
+        code: 404,
+        error: 'NotFound',
+        message: t('userItemsKeyNotFound', {type}),
+      });
+  });
+
+  it('sells an item', async () => {
+    await user.update({
+      items: {
+        eggs: {
+          Wolf: 1,
+        },
+      },
+    });
+
+    let response = await user.post(`/user/sell/${type}/${key}`);
+    await user.sync();
+
+    expect(response.message).to.equal(t('sold', {type, key}));
+    expect(user.stats.gp).to.equal(content[type][key].value);
+  });
+});