Add test for bat file quoting issue. NFC

See microsoft/terminal#15212

Author: sbc100

test/test_other.py

@@ -15083,6 +15083,18 @@ def test_no_extra_output(self):
     output = self.run_process([EMCC, '-c', test_file('hello_world.c')], stdout=PIPE, stderr=STDOUT).stdout
     self.assertEqual(output, '')
 
+  @crossplatform
+  def test_bat_file_bug(self):
+    # See https://github.com/microsoft/terminal/issues/15212
+    file = test_file('hello_world.c')
+    cmd = f'"emcc" -c {file}'
+    old_path = os.environ['PATH']
+    new_path = old_path + os.pathsep + os.path.dirname(EMCC)
+    with env_modify({'PATH': new_path}):
+      proc = subprocess.run(cmd, capture_output=True, text=True, shell=True, check=True)
+      self.assertEqual(proc.stdout, '')
+      self.assertEqual(proc.stderr, '')
+
   def test_browser_too_old(self):
     err = self.expect_fail([EMCC, test_file('hello_world.c'), '-sMIN_CHROME_VERSION=10'])
     self.assertContained('emcc: error: MIN_CHROME_VERSION older than 74 is not supported', err)