metadata:
  version: "1.0.0"
  last_updated: "2026-02-01"
  source_urls: []

category: collections
subcategory: objects
tier: T0

bugs_caught:
  - "Null reference on property access"
  - "Prototype pollution"
  - "Circular reference handling"

values:
  empty:
    value: {}
    bugs_caught:
      - "Empty object handling"
      - "Object.keys empty check"
    safe_for_automation: true

  single_property:
    value: {"key": "value"}
    bugs_caught:
      - "Single property access"
    safe_for_automation: true

  nested:
    value: {"a": {"b": {"c": "deep"}}}
    bugs_caught:
      - "Nested property access"
      - "Optional chaining need"
    safe_for_automation: true

  deeply_nested:
    value: {"l1": {"l2": {"l3": {"l4": {"l5": "value"}}}}}
    bugs_caught:
      - "Deep nesting handling"
      - "Stack overflow on recursion"
    safe_for_automation: true

  null_value:
    value: {"key": null}
    bugs_caught:
      - "Null property value"
      - "hasOwnProperty vs truthy check"
    safe_for_automation: true

  undefined_value:
    value: {"key": "undefined"}
    bugs_caught:
      - "Undefined property value"
    safe_for_automation: true

  numeric_keys:
    value: {"0": "zero", "1": "one"}
    bugs_caught:
      - "Numeric string keys"
      - "Array-like object confusion"
    safe_for_automation: true

  special_keys:
    value: {"": "empty", " ": "space", "a.b": "dotted"}
    bugs_caught:
      - "Special key handling"
      - "Dot notation failure"
    safe_for_automation: true

  # Prototype pollution vectors
  proto_key:
    value: {"__proto__": {"polluted": true}}
    bugs_caught:
      - "Prototype pollution"
      - "__proto__ key handling"
    safe_for_automation: true
    severity: security

  constructor_key:
    value: {"constructor": {"prototype": {}}}
    bugs_caught:
      - "Constructor pollution"
    safe_for_automation: true
    severity: security

  prototype_key:
    value: {"prototype": {"polluted": true}}
    bugs_caught:
      - "Prototype key confusion"
    safe_for_automation: true

  # Special built-in keys
  hasownproperty_key:
    value: {"hasOwnProperty": "overwritten"}
    bugs_caught:
      - "Built-in method shadowing"
    safe_for_automation: true

  tostring_key:
    value: {"toString": "not a function"}
    bugs_caught:
      - "toString override"
      - "String coercion failure"
    safe_for_automation: true

  # Circular reference
  circular:
    value_template: "let obj = {}; obj.self = obj;"
    bugs_caught:
      - "Circular reference handling"
      - "JSON.stringify failure"
      - "Infinite recursion"
    safe_for_automation: true
    note: "Object containing reference to itself"

  # Symbol keys
  symbol_key:
    value_template: "{[Symbol('key')]: 'value'}"
    bugs_caught:
      - "Symbol key enumeration"
      - "Object.keys misses symbols"
    safe_for_automation: true
    note: "JavaScript Symbol as key"