testcases:
  - name: "testcase 1"
    inputs:
    - 1 : ["TimeStamp", "set_value", "get_value"]
    - 2 : [[], ["foo", "bar", 1], ["foo", 1]]
    output:
    - 1 : [null, null, "bar"]
  
  - name: "testcase 3"
    inputs:
    - 1 : ["TimeStamp", "set_value", "get_value"]
    - 2 : [[], ["foo", "bar", 1], ["foo", 2]]
    output:
    - 1 :  [null, null, "bar"]
  
  - name: "testcase 4"
    inputs:
    - 1 : ["TimeStamp", "get_value", "set_value"]
    - 2 : [[], ["foo", 1], ["foo", "bar", 1]]
    output:
    - 1 : [null, "", null]
  
  - name: "testcase 5"
    inputs:
    - 1 : ["TimeStamp", "set_value", "set_value", "get_value"]
    - 2 : [[], ["foo", "bar", 1], ["foo", "tar", 4], ["foo", 4]]
    output:
    - 1 : [null, null, null, "tar"]
    

  - name: "testcase 6"
    inputs:
    - 1 : ["TimeStamp", "set_value", "get_value"]
    - 2 : [[], ["foo", "jar", 6], ["foo", 6]]
    output:
    - 1 : [null, null, "jar"]
  
  - name: "testcase 7"
    inputs:
    - 1 : ["TimeStamp", "set_value", "set_value", "get_value", "get_value"]
    - 2 : [[], ["foo", "tan", 7], ["foo", "ban", 9], ["foo", 8], ["foo", 9]]
    output:
    - 1 : [null, null, null, "tan", "ban"]