Feature: OG Social media cards

Not Original Gangsta, but ObjectGraph

Reason: images were showing on LinkedIn, but small.

app/test/firehose_web/controllers/blog_controller_test.exs

@@ -66,4 +66,64 @@ defmodule FirehoseWeb.BlogControllerTest do
       refute response =~ "post-status-banner"
     end
   end
+
+  describe "GET /blog/:blog_id/:slug - Open Graph meta tags" do
+    test "meta tags include og_title", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/hello-world") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:title")
+      assert response =~ "Hello World"
+    end
+
+    test "meta tags include og_description", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/hello-world") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:description")
+    end
+
+    test "meta tags include og_type article", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/hello-world") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:type" content="article")
+    end
+
+    test "meta tags include twitter:card", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/hello-world") |> html_response(200)
+
+      assert response =~ ~s(<meta name="twitter:card" content="summary_large_image")
+    end
+
+    test "meta tags include og_image when post has image", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/why-firehose") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:image")
+      assert response =~ "firehose-logo.png"
+    end
+
+    test "meta tags have correct og_url", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering/hello-world") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:url" content="http://localhost:4002/blog/engineering/hello-world")
+    end
+  end
+
+  describe "GET /blog/:blog_id - Open Graph meta tags" do
+    test "meta tags include og_title for blog listing", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:title")
+    end
+
+    test "meta tags have og_type website for blog listing", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering") |> html_response(200)
+
+      assert response =~ ~s(<meta property="og:type" content="website")
+    end
+
+    test "meta tags use summary twitter card for blog listing", %{conn: conn} do
+      response = conn |> get(~p"/blog/engineering") |> html_response(200)
+
+      assert response =~ ~s(<meta name="twitter:card" content="summary")
+    end
+  end
 end