Add t/0 types to remaining ExUnit exceptions (#13139)

Author: whatyouhide

lib/ex_unit/lib/ex_unit.ex

@@ -148,6 +148,16 @@ defmodule ExUnit do
   end
 
   defmodule TimeoutError do
+    @moduledoc """
+    Exception raised when a test times out.
+    """
+
+    @typedoc since: "1.16.0"
+    @type t :: %__MODULE__{
+            timeout: non_neg_integer,
+            type: String.t()
+          }
+
     defexception [:timeout, :type]
 
     @impl true

lib/ex_unit/lib/ex_unit/case.ex

@@ -1,8 +1,23 @@
 defmodule ExUnit.DuplicateTestError do
+  @moduledoc """
+  Exception raised to indicate two or more tests with the same name.
+  """
+
+  @typedoc since: "1.16.0"
+  @type t :: %__MODULE__{message: String.t()}
+
   defexception [:message]
 end
 
 defmodule ExUnit.DuplicateDescribeError do
+  @moduledoc """
+  Exception raised to indicate two or more `describe` blocks with
+  the same name.
+  """
+
+  @typedoc since: "1.16.0"
+  @type t :: %__MODULE__{message: String.t()}
+
   defexception [:message]
 end
 

lib/ex_unit/lib/ex_unit/doc_test.ex

@@ -152,6 +152,12 @@ defmodule ExUnit.DocTest do
   @opaque_type_regex ~r/#[\w\.]+</
 
   defmodule Error do
+    @moduledoc """
+    Exception raised when there's an error with the syntax or semantics of a doctest.
+    """
+
+    @typedoc since: "1.16.0"
+    @type t :: %__MODULE__{message: String.t()}
     defexception [:message]
 
     @impl true