test

tests/test_other.py

diff --git a/tests/test_other.py b/tests/test_other.py
index 0a5a84f..904bb1d 100644
--- a/tests/test_other.py
+++ b/tests/test_other.py
@@ -5564,6 +5564,24 @@
     self.assertNotEqual(result.returncode, 0)
     self.assertContained('Customizing EXPORT_NAME requires that the HTML be customized to use that name', result.stdout)
 
+  def test_modularize_code_caching(self):
+    create_test_file('extern-post.js', '''
+      var original = WebAssembly.Module;
+      var total = 0;
+      WebAssembly.Module = function(code) {
+        console.log('compile a new Module');
+        total++;
+        return new original(code);
+      };
+      for (var i = 0; i < 10; i++) {
+        console.log(i);
+        Module();
+      }
+      console.log('total Module creations', total, '.');
+    ''')
+    run_process([EMCC, path_from_root('tests', 'hello_world.c'), '-s', 'MODULARIZE=1', '-s', 'WASM_ASYNC_COMPILATION=0', '--extern-post-js', 'extern-post.js'])
+    self.assertContained('total Module creations 1 .', run_js('a.out.js'))
+
   @no_wasm_backend('tests fastcomp specific passes')
   def test_emcc_c_multi(self):
     def test(args, llvm_opts=None):