Send record of the day email

test/music_library/records_on_this_day_email_test.exs

@@ -0,0 +1,74 @@
+defmodule MusicLibrary.RecordsOnThisDayEmailTest do
+  use MusicLibrary.DataCase
+
+  import Swoosh.TestAssertions
+
+  alias MusicLibrary.Fixtures
+  alias MusicLibrary.Records.Record
+  alias MusicLibrary.RecordsOnThisDayEmail
+
+  setup do
+    Application.put_env(:music_library, RecordsOnThisDayEmail,
+      from_email: "test@example.com",
+      to_email: "recipient@example.com",
+      mailer: MusicLibrary.Mailer,
+      base_url: "http://localhost:4000"
+    )
+
+    on_exit(fn ->
+      Application.delete_env(:music_library, RecordsOnThisDayEmail)
+    end)
+  end
+
+  describe "send/1" do
+    test "sends email when records match the date" do
+      # Create a record with a release date matching March 5
+      record =
+        Fixtures.Records.record(%{
+          release_date: "2020-03-05",
+          title: "Test Album"
+        })
+
+      date = ~D[2025-03-05]
+      assert {:ok, :sent} = RecordsOnThisDayEmail.send(date)
+
+      assert_email_sent(fn email ->
+        assert email.subject =~ "Records on 5 March"
+        html = email.html_body
+        assert html =~ record.title
+        assert html =~ Record.artist_names(record)
+        assert html =~ "5 years ago"
+        assert html =~ "http://localhost:4000/collection/#{record.id}"
+      end)
+    end
+
+    test "skips sending when no records match" do
+      # Create a record with a release date that won't match
+      Fixtures.Records.record(%{release_date: "2020-01-01"})
+
+      date = ~D[2025-06-15]
+      assert {:ok, :no_records} = RecordsOnThisDayEmail.send(date)
+
+      refute_email_sent()
+    end
+
+    test "shows anniversary styling for milestone years" do
+      # 10 year anniversary (gold)
+      Fixtures.Records.record(%{
+        release_date: "2015-07-20",
+        title: "Gold Anniversary Album"
+      })
+
+      date = ~D[2025-07-20]
+      assert {:ok, :sent} = RecordsOnThisDayEmail.send(date)
+
+      assert_email_sent(fn email ->
+        html = email.html_body
+        assert html =~ "Gold Anniversary Album"
+        assert html =~ "10 years ago"
+        # Gold color
+        assert html =~ "#b45309"
+      end)
+    end
+  end
+end