Exclude gleam tests if gleam is missing

Author: Papipo

lib/mix/test/mix/gleam_test.exs

@@ -6,6 +6,7 @@ Code.require_file("../test_helper.exs", __DIR__)
 
 defmodule Mix.GleamTest do
   use MixTest.Case
+  @moduletag :gleam
 
   @compile {:no_warn_undefined, [:gleam_dep, :gleam@int]}
 

lib/mix/test/test_helper.exs

@@ -51,14 +51,23 @@ re_import_exclude =
     [:re_import]
   end
 
+gleam_exclude =
+  try do
+    Mix.Gleam.require!()
+    []
+  rescue
+    Mix.Error -> [gleam: true]
+  end
+
 Code.require_file("../../elixir/scripts/cover_record.exs", __DIR__)
 CoverageRecorder.maybe_record("mix")
 
 ExUnit.start(
   trace: !!System.get_env("TRACE"),
   exclude:
     epmd_exclude ++
-      os_exclude ++ git_exclude ++ line_exclude ++ cover_exclude ++ re_import_exclude,
+      os_exclude ++
+      git_exclude ++ line_exclude ++ cover_exclude ++ re_import_exclude ++ gleam_exclude,
   include: line_include,
   assert_receive_timeout: String.to_integer(System.get_env("ELIXIR_ASSERT_TIMEOUT", "300"))
 )