Mark test_rollup as @Crossplatform. NFC (emscripten-core#23735)

Author: sbc100

test/common.py

@@ -1412,6 +1412,10 @@ def build(self, filename, libraries=None, includes=None, force_c=False, emcc_arg
     self.run_process(cmd, stderr=self.stderr_redirect if not DEBUG else None)
     self.assertExists(output)
 
+    if output_suffix in ('.js', '.mjs'):
+      # Make sure we produced correct line endings
+      self.assertEqual(line_endings.check_line_endings(output), 0)
+
     return output
 
   def get_func(self, src, name):
@@ -1528,10 +1532,6 @@ def run_js(self, filename, engine=None, args=None,
       if stderr != STDOUT:
         stderr.close()
 
-    # Make sure that we produced proper line endings to the .js file we are about to run.
-    if not filename.endswith('.wasm'):
-      self.assertEqual(line_endings.check_line_endings(filename), 0)
-
     ret = read_file(stdout_file)
     if not interleaved_output:
       ret += read_file(stderr_file)

test/test_other.py

@@ -15678,6 +15678,7 @@ def test_late_module_api_assignment(self):
       expected = f"Aborted(Attempt to set `Module.{prop}` after it has already been processed.  This can happen, for example, when code is injected via '--post-js' rather than '--pre-js')"
       self.do_runf(test_file('hello_world.c'), expected, emcc_args=['--post-js=post.js', '-sWASM_ASYNC_COMPILATION=0'], assert_returncode=NON_ZERO)
 
+  @crossplatform
   def test_rollup(self):
     copytree(test_file('rollup_node'), '.')
     self.run_process([EMCC, test_file('hello_world.c'), '-sEXPORT_ES6', '-sEXIT_RUNTIME', '-sENVIRONMENT=node', '-sMODULARIZE', '-o', 'hello.mjs'])