test things more directly to improve coverage

tests/languages/script_test.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from pre_commit.languages import script
+from pre_commit.util import make_executable
+from testing.language_helpers import run_language
+
+
+def test_script_language(tmp_path):
+    exe = tmp_path.joinpath('main')
+    exe.write_text('#!/usr/bin/env bash\necho hello hello world\n')
+    make_executable(exe)
+
+    expected = (0, b'hello hello world\n')
+    assert run_language(tmp_path, script, 'main') == expected