JS:

expected { left: null,
  right: 
   { left: null,
     right: { left: [Object], right: [Object], value: 8 },
     value: 5 },
  value: 2 } to deeply equal { left: null,
  right: 
   { left: null,
     right: { left: [Object], right: [Object], value: 8 },
     value: 5 },
  value: 2 }