test: add tests for join request page

test/mv_web/live/join_live_test.exs

@@ -0,0 +1,130 @@
+defmodule MvWeb.JoinLiveTest do
+  @moduledoc """
+  Tests for the public join page (Subtask 4: Public join page and anti-abuse).
+
+  Covers: public path /join (unauthenticated 200), 404 when join disabled,
+  submit creates JoinRequest and shows success copy, honeypot prevents create,
+  rate limiting rejects excess submits. Uses unauthenticated conn; no User/Member.
+  """
+  use MvWeb.ConnCase, async: true
+  import Phoenix.LiveViewTest
+  import Ecto.Query
+
+  alias Mv.Membership
+  alias Mv.Repo
+
+  describe "GET /join" do
+    @tag role: :unauthenticated
+    test "unauthenticated GET /join returns 200 when join form is enabled", %{conn: conn} do
+      enable_join_form(true)
+      conn = get(conn, "/join")
+      assert conn.status == 200
+    end
+
+    @tag role: :unauthenticated
+    test "unauthenticated GET /join returns 404 when join form is disabled", %{conn: conn} do
+      enable_join_form(false)
+      conn = get(conn, "/join")
+      assert conn.status == 404
+    end
+  end
+
+  describe "submit join form" do
+    setup :enable_join_form_for_test
+
+    @tag role: :unauthenticated
+    test "submit with valid allowlist data creates one JoinRequest and shows success copy", %{
+      conn: conn
+    } do
+      count_before = count_join_requests()
+      {:ok, view, _html} = live(conn, "/join")
+
+      view
+      |> form("#join-form", %{
+        "email" => "newuser#{System.unique_integer([:positive])}@example.com",
+        "first_name" => "Jane",
+        "last_name" => "Doe",
+        "honeypot" => ""
+      })
+      |> render_submit()
+
+      assert count_join_requests() == count_before + 1
+      assert view |> element("[data-testid='join-success-message']") |> has_element?()
+      assert render(view) =~ "saved your details"
+      assert render(view) =~ "click the link"
+    end
+
+    @tag role: :unauthenticated
+    test "submit with honeypot filled does not create JoinRequest but shows same success copy", %{
+      conn: conn
+    } do
+      count_before = count_join_requests()
+      {:ok, view, _html} = live(conn, "/join")
+
+      view
+      |> form("#join-form", %{
+        "email" => "bot#{System.unique_integer([:positive])}@example.com",
+        "first_name" => "Bot",
+        "last_name" => "User",
+        "honeypot" => "filled-by-bot"
+      })
+      |> render_submit()
+
+      assert count_join_requests() == count_before
+      assert view |> element("[data-testid='join-success-message']") |> has_element?()
+    end
+
+    @tag role: :unauthenticated
+    @tag :slow
+    test "after rate limit exceeded submit returns 429 or error and no new JoinRequest", %{
+      conn: conn
+    } do
+      enable_join_form(true)
+      # Rely on test config: join rate limit low (e.g. 2 per window)
+      base_email = "ratelimit#{System.unique_integer([:positive])}@example.com"
+      count_before = count_join_requests()
+
+      {:ok, view, _html} = live(conn, "/join")
+
+      # Exhaust limit with valid submits
+      for i <- 0..1 do
+        view
+        |> form("#join-form", %{
+          "email" => "#{i}-#{base_email}",
+          "first_name" => "User",
+          "last_name" => "Test",
+          "honeypot" => ""
+        })
+        |> render_submit()
+      end
+
+      # Next submit should be rate limited
+      result =
+        view
+        |> form("#join-form", %{
+          "email" => "third-#{base_email}",
+          "first_name" => "Third",
+          "last_name" => "User",
+          "honeypot" => ""
+        })
+        |> render_submit()
+
+      assert count_join_requests() == count_before + 2
+      assert result =~ "rate limit" or result =~ "too many" or result =~ "429"
+    end
+  end
+
+  defp enable_join_form(enabled) do
+    {:ok, settings} = Membership.get_settings()
+    {:ok, _} = Membership.update_settings(settings, %{join_form_enabled: enabled})
+  end
+
+  defp enable_join_form_for_test(_context) do
+    enable_join_form(true)
+    :ok
+  end
+
+  defp count_join_requests do
+    Repo.one(from j in "join_requests", select: count(j.id)) || 0
+  end
+end