[
  {"json":{"sku":" DEMO-ZERO ","stock":"0"}},
  {"json":{"sku":"DEMO-OK","stock":"12"}},
  {"json":{"sku":"DEMO-MISSING","stock":""}},
  {"json":{"sku":"DEMO-UNIT","stock":"12pcs"}},
  {"json":{"sku":"DEMO-DECIMAL","stock":"1.5"}},
  {"json":{"sku":"DEMO-NEGATIVE","stock":"-1"}},
  {"json":{"sku":" ","stock":4}}
]