Redirect Marriage Abroad start page to new flow

app/flows/marriage_abroad_flow/start.erb

@@ -1,5 +1,5 @@
 <% text_for :title do %>
-  Getting married abroad
+  Getting married or registering a civil partnership abroad
 <% end %>
 
 <% text_for :meta_description do %>

app/presenters/flow_presenter.rb

@@ -55,7 +55,9 @@ def change_answer_link(question, forwarding_responses)
   end
 
   def start_page_link(forwarding_responses)
-    if response_store
+    if @flow.name.eql? "marriage-abroad" # Nasty hack to allow migration of old service to new one. Will be stripped asap
+      "https://www.prove-eligibility-foreign-government.service.gov.uk/before-you-start/which-country-are-you-getting-married-in"
+    elsif response_store
       start_flow_path(name, params: forwarding_responses)
     else
       smart_answer_path(name)

test/unit/flow_presenter_test.rb

@@ -141,4 +141,15 @@ def flow_registry
   test "#start_page_link returns the start page link for a non response store flow" do
     assert_equal "/flow-name/y", @flow_presenter.start_page_link({ "key" => "value" })
   end
+
+  test "#start_page_link returns the new flow when we're in marriage-abroad" do
+    @flow = SmartAnswer::Flow.build do
+      name "marriage-abroad"
+    end
+    @flow_presenter = FlowPresenter.new(@flow, nil)
+    assert_equal(
+      "https://www.prove-eligibility-foreign-government.service.gov.uk/before-you-start/which-country-are-you-getting-married-in",
+      @flow_presenter.start_page_link({ "key" => "value" }),
+    )
+  end
 end