Basic Plaid Integration (#1433)

* Basic plaid data model and linking

* Remove institutions, add plaid items

* Improve schema and Plaid provider

* Add webhook verification sketch

* Webhook verification

* Item accounts and balances sync setup

* Provide test encryption keys

* Fix test

* Only provide encryption keys in prod

* Try defining keys in test env

* Consolidate account sync logic

* Add back plaid account initialization

* Plaid transaction sync

* Sync UI overhaul for Plaid

* Add liability and investment syncing

* Handle investment webhooks and process current day holdings

* Remove logs

* Remove "all" period select for performance

* fix amount calc

* Remove todo comment

* Coming soon for investment historical data

* Document Plaid configuration

* Listen for holding updates

test/controllers/plaid_items_controller_test.rb

@@ -0,0 +1,49 @@
+require "test_helper"
+require "ostruct"
+
+class PlaidItemsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in @user = users(:family_admin)
+
+    @plaid_provider = mock
+
+    PlaidItem.stubs(:plaid_provider).returns(@plaid_provider)
+  end
+
+  test "create" do
+    public_token = "public-sandbox-1234"
+
+    @plaid_provider.expects(:exchange_public_token).with(public_token).returns(
+      OpenStruct.new(access_token: "access-sandbox-1234", item_id: "item-sandbox-1234")
+    )
+
+    assert_difference "PlaidItem.count", 1 do
+      post plaid_items_url, params: {
+        plaid_item: {
+          public_token: public_token,
+          metadata: { institution: { name: "Plaid Item Name" } }
+        }
+      }
+    end
+
+    assert_equal "Account linked successfully.  Please wait for accounts to sync.", flash[:notice]
+    assert_redirected_to accounts_path
+  end
+
+  test "destroy" do
+    delete plaid_item_url(plaid_items(:one))
+
+    assert_equal "Accounts scheduled for deletion.", flash[:notice]
+    assert_enqueued_with job: DestroyJob
+    assert_redirected_to accounts_path
+  end
+
+  test "sync" do
+    plaid_item = plaid_items(:one)
+    PlaidItem.any_instance.expects(:sync_later).once
+
+    post sync_plaid_item_url(plaid_item)
+
+    assert_redirected_to accounts_path
+  end
+end