upgrade to phoenix 1.7

test/cannery_web/controllers/error_html_test.exs

@@ -0,0 +1,14 @@
+defmodule CanneryWeb.ErrorHTMLTest do
+  use CanneryWeb.ConnCase, async: true
+  # Bring render_to_string/4 for testing custom views
+  import Phoenix.Template
+  alias CanneryWeb.ErrorHTML
+
+  test "renders 404.html" do
+    assert render_to_string(ErrorHTML, "404", "html", []) =~ "Not found"
+  end
+
+  test "renders 500.html" do
+    assert render_to_string(ErrorHTML, "500", "html", []) =~ "Internal server error"
+  end
+end