MapLibreParticleLab/metrics/integration/expression-tests/image/implicit-assert/test.json

{
  "expression": ["number", ["get", "icon"]],
  "propertySpec": {
    "type": "resolvedImage"
  },
  "expected": {
    "compiled": {
        "result": "error",
        "errors": [
          {"key": "", "error": "Expected resolvedImage but found number instead."}
        ]
    }
  }
}