canonical-data.json

{
  "exercise": "bank-account",
  "comments": [
    "This exercise is a good candidate to practice concurrency, which",
    "may not be available or possible in the implementing language track.",
    "It is possible to implement this exercise without concurrency."
  ],
  "cases": [
    {
      "uuid": "983a1528-4ceb-45e5-8257-8ce01aceb5ed",
      "description": "Newly opened account has zero balance",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 0
    },
    {
      "uuid": "e88d4ec3-c6bf-4752-8e59-5046c44e3ba7",
      "description": "Single deposit",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 100
    },
    {
      "uuid": "3d9147d4-63f4-4844-8d2b-1fee2e9a2a0d",
      "description": "Multiple deposits",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "deposit",
            "amount": 50
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 150
    },
    {
      "uuid": "08f1af07-27ae-4b38-aa19-770bde558064",
      "description": "Withdraw once",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "withdraw",
            "amount": 75
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 25
    },
    {
      "uuid": "6f6d242f-8c31-4ac6-8995-a90d42cad59f",
      "description": "Withdraw twice",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "withdraw",
            "amount": 80
          },
          {
            "operation": "withdraw",
            "amount": 20
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 0
    },
    {
      "uuid": "45161c94-a094-4c77-9cec-998b70429bda",
      "description": "Can do multiple operations sequentially",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "deposit",
            "amount": 110
          },
          {
            "operation": "withdraw",
            "amount": 200
          },
          {
            "operation": "deposit",
            "amount": 60
          },
          {
            "operation": "withdraw",
            "amount": 50
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 20
    },
    {
      "uuid": "f9facfaa-d824-486e-8381-48832c4bbffd",
      "description": "Cannot check balance of closed account",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "close"
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": { "error": "account not open" }
    },
    {
      "uuid": "7a65ba52-e35c-4fd2-8159-bda2bde6e59c",
      "description": "Cannot deposit into closed account",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "close"
          },
          {
            "operation": "deposit",
            "amount": 50
          }
        ]
      },
      "expected": { "error": "account not open" }
    },
    {
      "uuid": "a0a1835d-faae-4ad4-a6f3-1fcc2121380b",
      "description": "Cannot deposit into unopened account",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "deposit",
            "amount": 50
          }
        ]
      },
      "expected": { "error": "account not open" }
    },
    {
      "uuid": "570dfaa5-0532-4c1f-a7d3-0f65c3265608",
      "description": "Cannot withdraw from closed account",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "close"
          },
          {
            "operation": "withdraw",
            "amount": 50
          }
        ]
      },
      "expected": { "error": "account not open" }
    },
    {
      "uuid": "c396d233-1c49-4272-98dc-7f502dbb9470",
      "description": "Cannot close an account that was not opened",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "close"
          }
        ]
      },
      "expected": { "error": "account not open" }
    },
    {
      "uuid": "c06f534f-bdc2-4a02-a388-1063400684de",
      "description": "Cannot open an already opened account",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "open"
          }
        ]
      },
      "expected": { "error": "account already open" }
    },
    {
      "uuid": "0722d404-6116-4f92-ba3b-da7f88f1669c",
      "description": "Reopened account does not retain balance",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 50
          },
          {
            "operation": "close"
          },
          {
            "operation": "open"
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 0
    },
    {
      "uuid": "ec42245f-9361-4341-8231-a22e8d19c52f",
      "description": "Cannot withdraw more than deposited",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 25
          },
          {
            "operation": "withdraw",
            "amount": 50
          }
        ]
      },
      "expected": { "error": "amount must be less than balance" }
    },
    {
      "uuid": "4f381ef8-10ef-4507-8e1d-0631ecc8ee72",
      "description": "Cannot withdraw negative",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": 100
          },
          {
            "operation": "withdraw",
            "amount": -50
          }
        ]
      },
      "expected": { "error": "amount must be greater than 0" }
    },
    {
      "uuid": "d45df9ea-1db0-47f3-b18c-d365db49d938",
      "description": "Cannot deposit negative",
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "deposit",
            "amount": -50
          }
        ]
      },
      "expected": { "error": "amount must be greater than 0" }
    },
    {
      "uuid": "ba0c1e0b-0f00-416f-8097-a7dfc97871ff",
      "description": "Can handle concurrent transactions",
      "comments": [
        "This test is a good candidate to practice concurrency, which",
        "may not be available or possible in the implementing language track.",
        "Concurrency testing is often made by running the same operations in",
        "parallel, and then checking that the final state is as expected."
      ],
      "scenarios": ["concurrent"],
      "property": "bankAccount",
      "input": {
        "operations": [
          {
            "operation": "open"
          },
          {
            "operation": "concurrent",
            "number": 1000,
            "operations": [
              {
                "operation": "deposit",
                "amount": 1
              },
              {
                "operation": "withdraw",
                "amount": 1
              }
            ]
          },
          {
            "operation": "balance"
          }
        ]
      },
      "expected": 0
    }
  ]
}