How to use express-openapi-validate - 3 common examples

constructor(
    specPath: string,
    apiUrl: string,
    auth?: string,
    endPointValidator?: EndPointValidator, // simple DI
  ) {
    this.specPath = specPath;
    this.apiUrl = apiUrl;
    this.auth = auth ? auth : undefined;

    if (endPointValidator) {
      this.endPointValidator = endPointValidator;
    }

    this._document = this.loadOpenApiSpec();
    this._oa3Validator = new OpenApiValidator(this.document, {
      ajvOptions: { allErrors: true, verbose: true },
    });
  }

Object.keys(requestSchema.properties).forEach(prop => {
            const ref = resolveReference(
              document,
              (requestSchema as any).properties[prop],
            );
            const ex = this.generateExampleValue(ref);
            reqBody[prop] = ex ? ex : undefined;
          });
          debug(`Generated Body: ${JSON.stringify(reqBody, null, 2)}`);

path: string,
    opConfig: OperationConfig,
    document: OpenApiDocument,
  ): Object {
    const reqBody = {};

    if (opConfig.config.requestBody) {
      debug(
        `Attempting to generate requestBody for: ${opConfig.operation.toUpperCase()} ${path}...`,
      );

      let requestSchema: SchemaObject | ReferenceObject | undefined =
        opConfig.config.requestBody.content['application/json'].schema;

      if (requestSchema) {
        requestSchema = resolveReference(document, requestSchema);

        if (requestSchema.properties) {
          Object.keys(requestSchema.properties).forEach(prop => {
            const ref = resolveReference(
              document,
              (requestSchema as any).properties[prop],
            );
            const ex = this.generateExampleValue(ref);
            reqBody[prop] = ex ? ex : undefined;
          });
          debug(`Generated Body: ${JSON.stringify(reqBody, null, 2)}`);
        }
      }
    }

    return reqBody;