executor.ts

// Copyright 2024-2026 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import {
  create,
  createFileRegistry,
  fromBinary,
  type Registry,
  toBinary,
} from "@bufbuild/protobuf";
import {
  TestConformanceRequestSchema,
  TestConformanceResponseSchema,
  TestResultSchema,
} from "./gen/buf/validate/conformance/harness/harness_pb.js";
import { type Any, anyUnpack } from "@bufbuild/protobuf/wkt";
import * as process from "node:process";
import {
  createValidator,
  CompilationError,
  RuntimeError,
  violationsToProto,
} from "@bufbuild/protovalidate";

const request = fromBinary(TestConformanceRequestSchema, await readStdin());
if (!request.fdset) {
  throw new Error(`Empty request field "fdset"`);
}
const registry = createFileRegistry(request.fdset);
const validator = createValidator({ registry });
const response = create(TestConformanceResponseSchema);
for (const [name, any] of Object.entries(request.cases)) {
  const testResult = create(TestResultSchema);
  const unpacked = unpackTest(any, registry);
  if (unpacked) {
    const result = validator.validate(unpacked.schema, unpacked.message);
    switch (result.kind) {
      case "valid":
        testResult.result = { case: "success", value: true };
        break;
      case "invalid":
        testResult.result = {
          case: "validationError",
          value: violationsToProto(result.violations)[0],
        };
        break;
      case "error":
        if (result.error instanceof CompilationError) {
          testResult.result = {
            case: "compilationError",
            value: String(result.error),
          };
        } else if (result.error instanceof RuntimeError) {
          testResult.result = {
            case: "runtimeError",
            value: String(result.error),
          };
        }
        break;
    }
  } else {
    testResult.result = {
      case: "unexpectedError",
      value: `Unable to unpack Any with type_url "${any.typeUrl}"`,
    };
  }
  response.results[name] = testResult;
}
process.stdout.write(toBinary(TestConformanceResponseSchema, response));

function unpackTest(any: Any, registry: Registry) {
  const message = anyUnpack(any, registry);
  if (message) {
    const schema = registry.getMessage(message.$typeName);
    if (schema) {
      return { message, schema };
    }
  }
  return undefined;
}

async function readStdin(): Promise<Uint8Array> {
  const chunks: Uint8Array[] = [];
  for await (const chunk of process.stdin) {
    chunks.push(chunk as Uint8Array);
  }
  return Buffer.concat(chunks);
}