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name:
    Test that notValue constraint that says value must not be null fails if the
    value is null.

config:
    nodeId: 0x12344321
    cluster: "Unit Testing"
    endpoint: 1

tests:
    - label: "Write attribute NULLABLE_INT8U null value"
      command: "writeAttribute"
      attribute: "nullable_int8u"
      arguments:
          value: null

    - label: "Read attribute NULLABLE_INT8U null value with constraint"
      command: "readAttribute"
      attribute: "nullable_int8u"
      response:
          constraints:
              # This should fail.
              notValue: null