defmodule BDS.PreviewTest do
use ExUnit.Case, async: false
alias BDS.Generation
alias BDS.Metadata
alias BDS.Posts
setup do
:ok = Ecto.Adapters.SQL.Sandbox.checkout(BDS.Repo)
temp_dir = Path.join(System.tmp_dir!(), "bds-preview-#{System.unique_integer([:positive])}")
File.mkdir_p!(temp_dir)
on_exit(fn -> File.rm_rf(temp_dir) end)
{:ok, project} = BDS.Projects.create_project(%{name: "Preview", data_path: temp_dir})
%{project: project, temp_dir: temp_dir}
end
test "start_preview binds localhost and request resolves generated routes, assets, media, and draft previews", %{project: project, temp_dir: temp_dir} do
assert {:ok, _metadata} =
Metadata.update_project_metadata(project.id, %{
public_url: "https://example.com/blog",
main_language: "en",
blog_languages: ["en", "de"]
})
assert {:ok, _} = Generation.write_generated_file(project.id, "index.html", "home")
assert {:ok, _} = Generation.write_generated_file(project.id, "de/index.html", "startseite")
assert {:ok, _} = Generation.write_generated_file(project.id, "tag/elixir/index.html", "tag archive")
assert {:ok, _} = Generation.write_generated_file(project.id, "pagefind/pagefind-ui.js", "console.log('pagefind')")
media_dir = Path.join([temp_dir, "media", "2026", "04"])
File.mkdir_p!(media_dir)
File.write!(Path.join(media_dir, "image.txt"), "media body")
assert {:ok, post} =
Posts.create_post(%{
project_id: project.id,
title: "Draft Post",
content: "Draft preview body",
language: "en"
})
assert {:ok, server} = BDS.Preview.start_preview(project.id)
assert server.host == "127.0.0.1"
assert server.port == 4123
assert server.is_running == true
assert {:ok, %{body: "home", content_type: "text/html"}} = BDS.Preview.request(project.id, "/")
assert {:ok, %{body: "startseite", content_type: "text/html"}} = BDS.Preview.request(project.id, "/de/")
assert {:ok, %{body: "tag archive", content_type: "text/html"}} = BDS.Preview.request(project.id, "/tag/elixir")
assert {:ok, %{body: "console.log('pagefind')", content_type: "application/javascript"}} = BDS.Preview.request(project.id, "/pagefind/pagefind-ui.js")
assert {:ok, %{body: "media body", content_type: "text/plain"}} = BDS.Preview.request(project.id, "/media/2026/04/image.txt")
assert {:ok, %{body: draft_html, content_type: "text/html"}} =
BDS.Preview.preview_draft(project.id, "/draft/draft-post", post.id)
assert draft_html =~ "Draft preview body"
assert {:error, :not_found} = BDS.Preview.request(project.id, "/media/../../secret.txt")
assert :ok = BDS.Preview.stop_preview(project.id)
end
test "draft preview renders through the published post template", %{project: project} do
assert {:ok, template} =
BDS.Templates.create_template(%{
project_id: project.id,
title: "Preview Post",
kind: :post,
content: "{{ post.title }}
{{ post.content }}
"
})
assert {:ok, published_template} = BDS.Templates.publish_template(template.id)
assert {:ok, post} =
Posts.create_post(%{
project_id: project.id,
title: "Draft Post",
content: "Draft preview body",
language: "en",
template_slug: published_template.slug
})
assert {:ok, _server} = BDS.Preview.start_preview(project.id)
assert {:ok, %{body: draft_html, content_type: "text/html"}} =
BDS.Preview.preview_draft(project.id, "/draft/draft-post", post.id)
assert draft_html =~ "preview-template"
assert draft_html =~ "Draft Post"
assert draft_html =~ "Draft preview body"
assert :ok = BDS.Preview.stop_preview(project.id)
end
test "draft preview renders through copied starter templates with markdown and i18n", %{project: project} do
assert {:ok, _menu} =
BDS.Menu.update_menu(project.id, [
%{kind: :page, label: "Notes", slug: "notes"}
])
assert {:ok, _metadata} =
Metadata.update_project_metadata(project.id, %{
public_url: "https://example.com/blog",
main_language: "en",
blog_languages: ["en", "de"]
})
assert {:ok, post} =
Posts.create_post(%{
project_id: project.id,
title: "Draft Post",
content: "**Draft** preview body",
language: "en"
})
assert {:ok, _server} = BDS.Preview.start_preview(project.id)
assert {:ok, %{body: draft_html, content_type: "text/html"}} =
BDS.Preview.preview_draft(project.id, "/draft/draft-post", post.id)
assert draft_html =~ ~s(data-template="single-post")
assert draft_html =~ ~s(Draft preview body)
assert draft_html =~ "Language"
assert :ok = BDS.Preview.stop_preview(project.id)
end
test "start_preview serves generated and draft routes over real HTTP on localhost", %{project: project} do
:inets.start()
assert {:ok, _metadata} =
Metadata.update_project_metadata(project.id, %{
public_url: "https://example.com/blog",
main_language: "en",
blog_languages: ["en"]
})
assert {:ok, _} = Generation.write_generated_file(project.id, "index.html", "http home")
assert {:ok, post} =
Posts.create_post(%{
project_id: project.id,
title: "HTTP Draft",
content: "Draft over HTTP",
language: "en"
})
assert {:ok, server} = BDS.Preview.start_preview(project.id)
assert {:ok, {{_version, 200, _reason}, headers, body}} =
:httpc.request(:get, {to_charlist("http://#{server.host}:#{server.port}/"), []}, [], body_format: :binary)
assert body == "http home"
assert Enum.any?(headers, fn {name, value} -> String.downcase(to_string(name)) == "content-type" and to_string(value) =~ "text/html" end)
assert {:ok, {{_version, 200, _reason}, _headers, draft_body}} =
:httpc.request(:get, {to_charlist("http://#{server.host}:#{server.port}/draft/http-draft?post_id=#{post.id}"), []}, [], body_format: :binary)
assert draft_body =~ "Draft over HTTP"
assert :ok = BDS.Preview.stop_preview(project.id)
end
end