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TSpec
What TSpec is
TSpec is a free testing framework designed specifically for TypeScript developers testing TypeScript applications. It provides native TypeScript support and describes basic setup as requiring no configuration. Its assertion package handles synchronous checks as well as promises that resolve or reject. The mock package supplies mock functions, spies, and tools for replacing object methods.
Watch mode can rerun tests after files change and select tests affected by those changes. From the command line, users can select tests, set custom configuration, adjust verbosity, silence output, and set timeouts. An optional TypeScript configuration file can define test patterns, ignored paths, timeouts, and output options. TSpec also documents process exit codes for CI/CD workflows.
TSpec runs on Node.js and requires Node.js 20 or later. The project is MIT licensed and in active development. Although npm is the documented installation route and the tool can run from a project or command line, the project says it currently must be built from source; package publication is described as coming soon. The GitHub repository is owned by Oliver Richman, whose profile lists London, UK.
Who it suits
TSpec is aimed at TypeScript developers who want a framework for testing TypeScript applications, including checks, mocks, and file-watching workflows. It may suit developers comfortable building a project from source and working with Node.js 20 or later.
What it does well
- Native TypeScript support with zero-configuration basic use.
- Includes synchronous and async Promise assertions.
- Mock package supports functions, spies, and method replacement.
- Watch mode can select tests affected by changed files.
- Documents process exit codes for CI/CD workflows.
- MIT licensed and free.
What to know first
- Requires Node.js 20 or later.
- Current use requires building from source.
- Package publication is described as coming soon.
Limits
The project is in active development and currently requires building from source; package publication is described as coming soon. Node.js 20 or later is required.
Getting started
- Visit the project at https://github.com/oliver-richman/tspec.
- Use Node.js 20 or later.
- Build TSpec from source; package publication is described as coming soon.
- Use the documented npm installation route and run it from a project or command line.
- Optionally add a TypeScript configuration file for test patterns, ignores, timeouts, and output options.
Verdict
Pick TSpec if you develop TypeScript applications on Node.js and want a free framework with assertions, mocks, and watch mode. Look elsewhere if you need a published package now, since current use requires building from source and publication is still forthcoming.
Questions
Is TSpec free?
Yes. The project describes a free plan and identifies the repository as MIT licensed.
What runtime does TSpec require?
TSpec runs on Node.js, and Node.js 20 or later is the listed prerequisite.
How can I install it?
The project documents npm as the installation route, but says current use requires building from source. Package publication is described as coming soon.
Does TSpec need configuration?
Basic use is described as requiring no configuration. An optional TypeScript config file can set test patterns, ignored paths, timeouts, and output options.
What testing features does it include?
It includes synchronous and Promise assertions, mock functions, spies, object-method replacement, and watch mode.
Who maintains the repository?
The GitHub repository is owned by oliver-richman; the profile identifies him as Oliver Richman and lists London, UK.
Facts from TSpec's own pages
- Assertions
- Its assertion package includes synchronous assertions and async Promise resolve and reject assertions. · github.com, 8 Oct 2026
- CI support
- The README describes process exit codes for use in CI/CD workflows. · github.com, 8 Oct 2026
- CLI
- The CLI offers options for test selection, custom configuration, verbosity, silence, and timeouts. · github.com, 8 Oct 2026
- Configuration
- Basic usage requires no configuration, and an optional TypeScript config file can set test patterns, ignores, timeouts, and output options. · github.com, 8 Oct 2026
- Distribution status
- The project says it is in active development and that package publication is coming soon; current use requires building from source. · github.com, 8 Oct 2026
- Installation status
- The README says TSpec is in development and currently requires building from source; package publication is described as coming soon. · github.com, 8 Oct 2026
- Intended users
- The project describes itself as designed specifically for TypeScript developers. · github.com, 8 Oct 2026
- License
- The repository identifies the project as MIT licensed. · github.com, 8 Oct 2026
- Maker
- The GitHub repository is owned by oliver-richman, whose profile identifies him as Oliver Richman and lists London, UK. · github.com, 8 Oct 2026
- Mocking
- Its mock package supports mock functions, spies, and replacing object methods. · github.com, 8 Oct 2026
- Platform
- The README documents installation through npm and running TSpec from a project or command line. · github.com, 8 Oct 2026
- Purpose
- TSpec is a TypeScript-first testing framework for testing TypeScript applications. · github.com, 8 Oct 2026
- Runtime requirement
- The listed prerequisite is Node.js 20 or later. · github.com, 8 Oct 2026
- Security and compliance
- The opened README does not state any security certification or compliance claim. · github.com, 8 Oct 2026
- Setup
- The project describes zero-configuration setup for basic use and native TypeScript support. · github.com, 8 Oct 2026
- Watch mode
- Watch mode can rerun tests when files change and select affected tests. · github.com, 8 Oct 2026
- What it does
- TSpec is a TypeScript-first testing framework for testing TypeScript applications. · github.com, 8 Oct 2026
Where TSpec stands on Freedom251
- Threat Modeling Software#13 of 23
- JavaScript Testing Frameworks#20 of 23