CSV Imports Overhaul (Transactions, Trades, Accounts, and Mint import support) (#1209)

* Remove stale 1.0 import logic and model

* Fresh start

* Checkpoint before removing nav

* First working prototype

* Add trade, account, and mint import flows

* Basic working version with tests

* System tests for each import type

* Clean up mappings flow

* Clean up PR, refactor stale code, tests

* Add back row validations

* Row validations

* Fix import job test

* Fix import navigation

* Fix mint import configuration form

* Currency preset for new accounts

test/interfaces/import_interface_test.rb

@@ -0,0 +1,57 @@
+require "test_helper"
+
+module ImportInterfaceTest
+  extend ActiveSupport::Testing::Declarative
+
+  test "import interface" do
+    assert_respond_to @subject, :publish
+    assert_respond_to @subject, :publish_later
+    assert_respond_to @subject, :generate_rows_from_csv
+    assert_respond_to @subject, :csv_rows
+    assert_respond_to @subject, :csv_headers
+    assert_respond_to @subject, :csv_sample
+    assert_respond_to @subject, :uploaded?
+    assert_respond_to @subject, :configured?
+    assert_respond_to @subject, :cleaned?
+    assert_respond_to @subject, :publishable?
+    assert_respond_to @subject, :importing?
+    assert_respond_to @subject, :complete?
+    assert_respond_to @subject, :failed?
+  end
+
+  test "publishes later" do
+    import = imports(:transaction)
+
+    import.stubs(:publishable?).returns(true)
+
+    assert_enqueued_with job: ImportJob, args: [ import ] do
+      import.publish_later
+    end
+
+    assert_equal "importing", import.reload.status
+  end
+
+  test "raises if not publishable" do
+    import = imports(:transaction)
+
+    import.stubs(:publishable?).returns(false)
+
+    assert_raises(RuntimeError, "Import is not publishable") do
+      import.publish_later
+    end
+  end
+
+  test "handles publish errors" do
+    import = imports(:transaction)
+
+    import.stubs(:publishable?).returns(true)
+    import.stubs(:import!).raises(StandardError, "Failed to publish")
+
+    assert_nil import.error
+
+    import.publish
+
+    assert_equal "Failed to publish", import.error
+    assert_equal "failed", import.status
+  end
+end