[
  {
    "name": "Fields",
    "context": {
      "value": {
        "Number": 1,
        "Bool": true,
        "String": "Hey"
      },
      "previousValue": {
        "Number": 2,
        "Bool": false,
        "String": "Hi"
      }
    },
    "checks": [
      { "expr": "Number", "expected": 1 },
      { "expr": "Bool", "expected": true },
      { "expr": "String", "expected": "Hey" },
      { "expr": "[Number]", "expected": 1 },
      { "expr": "[Bool]", "expected": true },
      { "expr": "[String]", "expected": "Hey" },

      { "expr": "LAST Number", "expected": 2 },
      { "expr": "LAST Bool", "expected": false },
      { "expr": "LAST String", "expected": "Hi" },
      { "expr": "[LAST Number]", "expected": 2 },
      { "expr": "[LAST Bool]", "expected": false },
      { "expr": "[LAST String]", "expected": "Hi" },

      { "expr": "Number = Number", "expected": true },
      { "expr": "Bool = Bool", "expected": true },
      { "expr": "String = String", "expected": true }
    ]
  },
  {
    "name": "Numeric ops",
    "context": {
      "value": {
        "Two": 2,
        "Three": 3,
        "Six": 6,
        "Tau": 6.28318,
        "Euler": 2.71828
      }
    },
    "checks": [
      { "expr": "Two + Three", "expected": 5 },
      { "expr": "Three - Two", "expected": 1 },
      { "expr": "Two * Three", "expected": 6 },
      { "expr": "Six / Two", "expected": 3 },
      { "expr": "Tau + Two", "expected": 8.28318 },
      { "expr": "Tau / Two", "expected": 3.14159 },
      {
        "expr": "Tau * Euler > 17.079 .AND. Tau * Euler < 17.081",
        "expected": true
      },
      { "expr": "Six .MOD. Two", "expected": 0 },
      { "expr": "Three .MOD. Two", "expected": 1 },
      { "expr": "Three / 0", "error": true },
      { "expr": "Two + .EMPTY.", "error": true },
      { "expr": "Two - .EMPTY.", "error": true },
      { "expr": "Two * .EMPTY.", "error": true },
      { "expr": "Two / .EMPTY.", "error": true }
    ]
  },
  {
    "name": "String concat",
    "context": {
      "value": {
        "Greeting": "Hello",
        "Subject": "World"
      }
    },
    "checks": [
      { "expr": "Greeting || Subject", "expected": "HelloWorld" },
      { "expr": "Greeting || ', ' || Subject", "expected": "Hello, World" },
      { "expr": "Greeting || \", \" || Subject", "expected": "Hello, World" }
    ]
  },
  {
    "name": "Time math",
    "context": {
      "value": {
        "Date": "2023-04-21",
        "Timestamp": "2023-04-21T01:02:03.000Z",
        "DateTwo": "2023-04-19",
        "TimestampTwo": "2023-04-21T01:01:03.000Z"
      }
    },
    "checks": [
      { "expr": "Date + 1", "expected": "2023-04-22" },
      { "expr": "1 + Date", "expected": "2023-04-22" },
      { "expr": "Date - 1", "expected": "2023-04-20" },
      { "expr": "Timestamp + 1", "expected": "2023-04-22T01:02:03.000Z" },
      { "expr": "1 + Timestamp", "expected": "2023-04-22T01:02:03.000Z" },
      { "expr": "Timestamp - 1", "expected": "2023-04-20T01:02:03.000Z" },
      { "expr": "Timestamp + 1.0", "expected": "2023-04-22T01:02:03.000Z" },
      { "expr": "1.0 + Timestamp", "expected": "2023-04-22T01:02:03.000Z" },
      { "expr": "Timestamp - 1.0", "expected": "2023-04-20T01:02:03.000Z" },
      {
        "expr": "Timestamp + (1.0 / (24 * 60))",
        "expected": "2023-04-21T01:03:03.000Z"
      },
      {
        "expr": "Timestamp - (1.0 / (24 * 60))",
        "expected": "2023-04-21T01:01:03.000Z"
      },
      { "expr": "Date - DateTwo", "expected": 2 },
      {
        "expr": "(Timestamp - TimestampTwo) > (0.9 / (24 * 60)) .AND. (Timestamp - TimestampTwo) < (1.1 / (24 * 60)) ",
        "expected": true
      }
    ]
  }
]