From 1beffe6b07d49c36b441f541da3b93c44dd3c074 Mon Sep 17 00:00:00 2001
From: Chili Palmer <hugoms@me.com>
Date: Sat, 9 May 2026 15:10:24 +0200
Subject: [PATCH] chore: unit test for csm-013

---
 test/bds/csm013_bang_rendering_test.exs | 122 ++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 test/bds/csm013_bang_rendering_test.exs

diff --git a/test/bds/csm013_bang_rendering_test.exs b/test/bds/csm013_bang_rendering_test.exs
new file mode 100644
index 0000000..c0e131b
--- /dev/null
+++ b/test/bds/csm013_bang_rendering_test.exs
@@ -0,0 +1,122 @@
+defmodule BDS.CSM013BangRenderingTest do
+  use ExUnit.Case, async: false
+
+  alias BDS.Rendering
+  alias BDS.Rendering.PostRendering
+  alias BDS.Rendering.TemplateSelection
+
+  setup do
+    :ok = Ecto.Adapters.SQL.Sandbox.checkout(BDS.Repo)
+    temp_dir = Path.join(System.tmp_dir!(), "bds-csm013-#{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: "CSM013", data_path: temp_dir})
+
+    {:ok, _metadata} =
+      BDS.Metadata.update_project_metadata(project.id, %{
+        main_language: "en",
+        blog_languages: ["en"]
+      })
+
+    %{project: project}
+  end
+
+  describe "template with syntax error" do
+    test "render_template returns {:error, _} instead of raising", %{project: project} do
+      bad_source = "{% for item in items %}unclosed"
+
+      result = TemplateSelection.render_template(project.id, bad_source, %{})
+
+      assert {:error, _reason} = result
+    end
+
+    test "render_post_page returns {:error, _} for broken template source", %{project: project} do
+      {:ok, template} =
+        BDS.Templates.create_template(%{
+          project_id: project.id,
+          title: "Broken Template",
+          kind: :post,
+          content: "{% if true %}unclosed if"
+        })
+
+      {:ok, published_template} = BDS.Templates.publish_template(template.id)
+
+      {:ok, post} =
+        BDS.Posts.create_post(%{
+          project_id: project.id,
+          title: "Test Post",
+          content: "Body",
+          language: "en",
+          template_slug: published_template.slug
+        })
+
+      {:ok, published_post} = BDS.Posts.publish_post(post.id)
+
+      result =
+        Rendering.render_post_page(project.id, published_template.slug, %{
+          id: published_post.id,
+          title: published_post.title,
+          content: published_post.content || "",
+          slug: published_post.slug,
+          language: "en",
+          template_slug: published_post.template_slug
+        })
+
+      assert {:error, _reason} = result
+    end
+  end
+
+  describe "Liquex.render! error in render_template" do
+    test "returns {:error, _} when render raises on invalid AST usage", %{project: project} do
+      source = "{% break %}"
+
+      result = TemplateSelection.render_template(project.id, source, %{})
+
+      assert {:error, _reason} = result
+    end
+  end
+
+  describe "post_data_json_value" do
+    test "returns valid JSON for normal post context" do
+      context = %{
+        id: "abc",
+        title: "Test",
+        slug: "test",
+        excerpt: "An excerpt",
+        author: "Author",
+        language: "en",
+        published_at: 1_000_000,
+        created_at: 1_000_000,
+        updated_at: 1_000_000,
+        tags: ["a", "b"],
+        categories: ["c"]
+      }
+
+      result = PostRendering.post_data_json_value(context)
+      assert is_binary(result)
+      assert {:ok, decoded} = Jason.decode(result)
+      assert decoded["id"] == "abc"
+      assert decoded["tags"] == ["a", "b"]
+    end
+
+    test "returns fallback JSON when context contains non-encodable data" do
+      context = %{
+        id: make_ref(),
+        title: "Test",
+        slug: "test",
+        excerpt: nil,
+        author: nil,
+        language: "en",
+        published_at: nil,
+        created_at: nil,
+        updated_at: nil,
+        tags: [],
+        categories: []
+      }
+
+      result = PostRendering.post_data_json_value(context)
+      assert result == "{}"
+    end
+  end
+end