divkit/test_data/expression_test_data/custom_functions.json

{
  "cases": [
    {
      "expression": "@{equalsQuery('some string', 'one')}",
      "expected": {
        "type": "boolean",
        "value": false
      },
      "functions": [
        {
          "name": "equalsQuery",
          "body": "@{str == query}",
          "return_type": "boolean",
          "arguments": [
            {
              "name": "str",
              "type": "string"
            },
            {
              "name": "query",
              "type": "string"
            }
          ]
        }
      ],
      "platforms": [
        "ios"
      ]
    },
    {
      "expression": "@{sumUp(2, 3)}",
      "expected": {
        "type": "integer",
        "value": 5
      },
      "functions": [
        {
          "name": "sumUp",
          "body": "@{num1 + num2}",
          "return_type": "integer",
          "arguments": [
            {
              "name": "num1",
              "type": "integer"
            },
            {
              "name": "num2",
              "type": "integer"
            }
          ]
        }
      ],
      "platforms": [
        "ios"
      ]
    },
    {
      "expression": "@{testFunction + 1}",
      "expected": {
        "type": "error",
        "value": "Failed to evaluate [testFunction + 1]. Operator '+' cannot be applied to different types: Function and Integer."
      },
      "variables": [],
      "functions": [
        {
          "name": "testFunction",
          "body": "@{'result'}",
          "return_type": "string",
          "arguments": [
            {
              "name": "item",
              "type": "string"
            }
          ]
        }
      ],
      "platforms": []
    },
    {
      "expression": "@{toString(myFunction)}",
      "expected": {
        "type": "error",
        "value": "Failed to evaluate [toString(myFunction)]. Function has no matching overload for given argument types: Function."
      },
      "variables": [],
      "functions": [
        {
          "name": "myFunction",
          "body": "@{num * 2}",
          "return_type": "integer",
          "arguments": [
            {
              "name": "num",
              "type": "integer"
            }
          ]
        }
      ],
      "platforms": []
    }
  ]
}