Plaid type mapping tests

test/models/plaid_account/type_mappable_test.rb

@@ -0,0 +1,35 @@
+require "test_helper"
+
+class PlaidAccount::TypeMappableTest < ActiveSupport::TestCase
+  setup do
+    class MockProcessor
+      include PlaidAccount::TypeMappable
+    end
+
+    @mock_processor = MockProcessor.new
+  end
+
+  test "maps types to accountables" do
+    assert_instance_of Depository, @mock_processor.map_accountable("depository")
+    assert_instance_of Investment, @mock_processor.map_accountable("investment")
+    assert_instance_of CreditCard, @mock_processor.map_accountable("credit")
+    assert_instance_of Loan, @mock_processor.map_accountable("loan")
+    assert_instance_of OtherAsset, @mock_processor.map_accountable("other")
+  end
+
+  test "maps subtypes" do
+    assert_equal "checking", @mock_processor.map_subtype("depository", "checking")
+    assert_equal "roth_ira", @mock_processor.map_subtype("investment", "roth")
+  end
+
+  test "raises on invalid types" do
+    assert_raises PlaidAccount::TypeMappable::UnknownAccountTypeError do
+      @mock_processor.map_accountable("unknown")
+    end
+  end
+
+  test "handles nil subtypes" do
+    assert_equal "other", @mock_processor.map_subtype("depository", nil)
+    assert_equal "other", @mock_processor.map_subtype("depository", "unknown")
+  end
+end