---
- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key3: value3
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22
    key3: value3

- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key2: value9
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22

- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key1: value9
    key2:
      key22: value99
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22

- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key1: value9
    key2:
      key33: value33
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22
      key33: value33

- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key1: value9
    key2:
      key33: value33
    key3: value3
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22
      key33: value33
    key3: value3

- dict1:
    key1: value1
    key2:
      key21: value21
      key22: value22
  dict2:
    key1: value9
    key2:
      key22: value99
      key33: value33
    key3: value3
  result:
    key1: value1
    key2:
      key21: value21
      key22: value22
      key33: value33
    key3: value3