Fix blog API tests and add missing tag tests

- Add Accept: application/json headers to all API endpoint tests
- Add GET /blog/releases/tag/:tag HTML page test
- Add GET /api/blog/*/tag/:tag JSON API tests for both blogs
- Fix feed.xml assertions to check body first, then content type

app/test/firehose_web/controllers/blog_test.exs

@@ -1,3 +1,5 @@
+# Fixed test file with proper Accept headers for API tests
+
 defmodule FirehoseWeb.BlogTest do
   use FirehoseWeb.ConnCase
 
@@ -67,10 +69,17 @@ defmodule FirehoseWeb.BlogTest do
       body = html_response(conn, 200)
       assert body =~ "v0.1.0 Released"
     end
+
+    test "GET /blog/releases/tag/:tag returns HTML tag page", %{conn: conn} do
+      conn = get(conn, "/blog/releases/tag/elixir")
+      body = html_response(conn, 200)
+      assert body =~ ~s(tagged "elixir")
+    end
   end
 
   describe "engineering blog (JSON API)" do
     test "GET /api/blog/engineering returns post index", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
       conn = get(conn, "/api/blog/engineering")
       assert %{"blog" => "engineering", "posts" => posts} = json_response(conn, 200)
       assert is_list(posts)
@@ -78,24 +87,34 @@ defmodule FirehoseWeb.BlogTest do
     end
 
     test "GET /api/blog/engineering/:slug returns a post", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
       conn = get(conn, "/api/blog/engineering/hello-world")
       assert %{"id" => "hello-world", "title" => "Hello World"} = json_response(conn, 200)
     end
 
     test "GET /api/blog/engineering/:slug returns 404 for missing post", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
       conn = get(conn, "/api/blog/engineering/nonexistent")
       assert response(conn, 404)
     end
 
     test "GET /api/blog/engineering/feed.xml returns RSS", %{conn: conn} do
       conn = get(conn, "/api/blog/engineering/feed.xml")
-      assert response_content_type(conn, :xml)
       assert response(conn, 200) =~ "<rss"
+      assert response_content_type(conn, :xml)
+    end
+
+    test "GET /api/blog/engineering/tag/:tag returns JSON with posts", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
+      conn = get(conn, "/api/blog/engineering/tag/elixir")
+      assert %{"blog" => "engineering", "tag" => "elixir", "posts" => posts} = json_response(conn, 200)
+      assert is_list(posts)
     end
   end
 
   describe "release notes blog (JSON API)" do
     test "GET /api/blog/releases returns post index", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
       conn = get(conn, "/api/blog/releases")
       assert %{"blog" => "release_notes", "posts" => posts} = json_response(conn, 200)
       assert is_list(posts)
@@ -103,14 +122,22 @@ defmodule FirehoseWeb.BlogTest do
     end
 
     test "GET /api/blog/releases/:slug returns a post", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
       conn = get(conn, "/api/blog/releases/v0-1-0")
       assert %{"id" => "v0-1-0", "title" => "v0.1.0 Released"} = json_response(conn, 200)
     end
 
     test "GET /api/blog/releases/feed.xml returns RSS", %{conn: conn} do
       conn = get(conn, "/api/blog/releases/feed.xml")
-      assert response_content_type(conn, :xml)
       assert response(conn, 200) =~ "<rss"
+      assert response_content_type(conn, :xml)
+    end
+
+    test "GET /api/blog/releases/tag/:tag returns JSON with posts", %{conn: conn} do
+      conn = conn |> put_req_header("accept", "application/json")
+      conn = get(conn, "/api/blog/releases/tag/elixir")
+      assert %{"blog" => "release_notes", "tag" => "elixir", "posts" => posts} = json_response(conn, 200)
+      assert is_list(posts)
     end
   end
 end