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Protocol Buffers Schema (proto3)

A proto3 Protocol Buffers schema with messages, an enum, and a repeated field, for testing protobuf compilers (protoc), codegen, and schema tooling.

API testingConversion testing
Preview, first 31 linesproto
syntax = "proto3";

package novus.example.v1;

// A tiny example schema for testing protobuf tooling and codegen.

message User {
  int64 id = 1;
  string name = 2;
  string email = 3;
  Role role = 4;
}

enum Role {
  ROLE_UNSPECIFIED = 0;
  ROLE_ADMIN = 1;
  ROLE_MEMBER = 2;
  ROLE_GUEST = 3;
}

message ListUsersRequest {
  int32 page = 1;
  int32 page_size = 2;
}

message ListUsersResponse {
  int32 page = 1;
  int32 total = 2;
  repeated User items = 3;
}

Specifications

Format
Protocol Buffers (proto3)
Messages
3
Enum
Role

Testing contract

Expected to pass
Scenario
Exercise Protocol Buffers Schema (proto3) in its api workflow. A proto3 Protocol Buffers schema with messages, an enum, and a repeated field, for testing protobuf compilers (protoc), codegen, and schema tooling.
Expected result
30 text lines, decoded as UTF-8; first nonempty line is 'syntax = "proto3";'. Declared feature checks: messages=3; enum=Role.

What is a .proto file?

Proto files define Protocol Buffers schemas, Google's language-neutral interface definition language for serializing structured data. They declare typed messages, fields, and services that a compiler turns into efficient binary serialization code in many languages. They underpin gRPC and high-performance data interchange.

How to use this file

Use an example proto file to test schema parsers, code generation across languages, and gRPC service or message-definition tooling.

How to use this file for testing

“Protocol Buffers Schema (proto3)” is a deterministic Testaroo fixture for API testing, Conversion testing. OpenAPI/Swagger specs, GraphQL SDL, JSON Schema, paginated and problem+json error payloads, and webhook samples, for testing API clients, mock servers, contract tests, and schema validators.

Documented properties for this file: 3 messages · Protocol Buffers (proto3). Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.

Data fixtures document their exact quirks (delimiters, encodings, null handling, schema, and row counts) in the spec table. Point your parser or importer at the file and assert it handles the documented edge cases; clean and deliberately-messy siblings make before/after diffs straightforward.

Generated by generation/data_dev_fixtures.py. Free for any use, no attribution required, license.

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