EvaluateCode

Source: src/AWS/AppSync/EvaluateCode.ts

Runtime binding for appsync:EvaluateCode — evaluate APPSYNC_JS resolver/function code against a mock context without touching a deployed resolver. Useful for CI/tooling functions that validate resolver code before it ships.

An account-level operation: the binding takes no resource. GraphQL evaluation errors do not fail the effect — they surface on the response’s error field. Provide AppSync.EvaluateCodeHttp on the hosting function’s Effect to implement the binding.

Evaluating Resolver Code

// init — account-level binding takes no resource
const evaluateCode = yield* AppSync.EvaluateCode();

// runtime
const result = yield* evaluateCode({
  runtime: AppSync.APPSYNC_JS,
  code: `
    export function request(ctx) { return { payload: ctx.args.a + ctx.args.b }; }
    export function response(ctx) { return ctx.result; }
  `,
  context: JSON.stringify({ arguments: { a: 2, b: 3 } }),
  function: "request",
});
// JSON.parse(result.evaluationResult!) → { payload: 5 }