Email addresses with different cases are considered equal

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## Change log
 
+- Email addresses with different cases are considered equal.
 - **Breaking change:** Use `EctoEmail` instead of `Ecto.Email`.
 
 ## 1.0.0

lib/ecto_email.ex

@@ -115,6 +115,7 @@ defmodule EctoEmail do
   """
   @impl Ecto.Type
   def equal?(address, address) when is_binary(address), do: true
+  def equal?(left, right) when is_binary(left) and is_binary(right), do: String.downcase(left) == String.downcase(right)
   def equal?(_, _), do: false
 
   @doc "Callback implementation for `c:Ecto.Type.load/1`"

test/ecto_email_test.exs

@@ -83,6 +83,10 @@ defmodule EctoEmailTest do
       assert "[email protected]" |> EctoEmail.equal?("[email protected]")
     end
 
+    test "is true when the addresses have the same content but different case" do
+      assert "[email protected]" |> EctoEmail.equal?("[email protected]")
+    end
+
     test "is false when the addresses are the same" do
       refute "[email protected]" |> EctoEmail.equal?("[email protected]")
     end