Account::Sync model and test fixture simplifications (#968)

* Add sync model

* Fresh fixtures for sync tests

* Sync tests overhaul

* Fix entry tests

* Complete remaining model test updates

* Update system tests

* Update demo data task

* Add system tests back to PR checks

* More simplifications, add empty family to fixtures for easier testing

test/system/transfers_test.rb

@@ -7,8 +7,8 @@ class TransfersTest < ApplicationSystemTestCase
   end
 
   test "can create a transfer" do
-    checking_name = accounts(:checking).name
-    savings_name = accounts(:savings).name
+    checking_name = accounts(:depository).name
+    savings_name = accounts(:credit_card).name
     transfer_date = Date.current
 
     click_on "New transaction"
@@ -32,15 +32,15 @@ class TransfersTest < ApplicationSystemTestCase
 
   test "can match 2 transactions and create a transfer" do
     transfer_date = Date.current
-    outflow = accounts(:savings).entries.create! \
-      name: "Outflow from savings account",
+    outflow = accounts(:depository).entries.create! \
+      name: "Outflow from checking account",
       date: transfer_date,
       amount: 100,
       currency: "USD",
       entryable: Account::Transaction.new
 
-    inflow = accounts(:checking).entries.create! \
-      name: "Inflow to checking account",
+    inflow = accounts(:credit_card).entries.create! \
+      name: "Inflow to cc account",
       date: transfer_date,
       amount: -100,
       currency: "USD",
@@ -64,7 +64,7 @@ class TransfersTest < ApplicationSystemTestCase
     txn = @user.family.entries.reverse_chronological.first
 
     within "#" + dom_id(txn) do
-      assert_text "Uncategorized"
+      assert_text txn.account_transaction.category.name || "Uncategorized"
     end
 
     transaction_entry_checkbox(txn).check