Skip to content
Go to file

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

Build Status

Current build results

This is metamath-test, a test suite for verifiers implementing the metamath specification (see

This includes a set of test files that should and should not pass. The C metamath implementation includes some sample .mm files, but no tests that are intended to not pass. That's not good, because if you replaced a verifier with the program "true" it would produce the same results :-). This package includes a collection of "negative tests" that should not pass, and thus more rigorously tests the verifiers. This project includes .mm files, but they are not necessarily the latest version of various theorems. The purpose of this project is to test the verification tools themselves.

It also includes a set of drivers for running various metamath verifiers, and a .travis.yml file that automatically downloads and compiles some metamath verifiers, and then tries them on the test files. That's helpful, because with a single shared test suite, any error found in any verifier can be added to this shared test suite, and that helps counter the same error from resurfacing anywhere.

The output conforms to the Test Anything Protocol (TAP); see and

Common changes:

  • To add a test, add a new .mm file with the test, and modify run-testsuite to invoke it (using "pass" if it should pass or "fail" if it should fail).
  • To add a new verifier, create a test-... driver to run it, add the name to the file DRIVERS, and modify .travis.yml to auto-download & compile it.

Key files:

  • run-testsuite-all-drivers : Run testsuite against all drivers in DRIVERS.
  • DRIVERS : Text file, list of drivers. "#" at beginning of line is a comment
  • run-testsuite DRIVERNAME: Run entire testsuite using given driver
  • Test file, used by run-testsuite

In normal use, run all tests by invoking "run-testsuite-all-drivers". If you want to run all tests using only the C metamath implementation, type:

./run-testsuite ./test-metamath

This testsuite focuses on detecting actual errors in verifying proofs, not style or formatting issues.

Currently-supported verifiers:

  • metamath: C metamath implementation by Norm Megill
  • hmmverifier: Haskell implementation by Marnix Klooster
  • smetamath: Rust implementation by Stefan O'Rear
  • checkmm: C++ implementation by Eric Schmidt
  • mmj2: Java implementation by Mel O'Cat and Mario Carneiro
  • mmverifypy: Python implementation by Raph Levien

This is MIT licensed, but many of the individual tests are licensed under the CC0.

Many of the original test files are from the metamath C implementation. My sincere thanks to Norm Megill for his work on metamath.


Test metamath verification implementations




No releases published

Contributors 4

You can’t perform that action at this time.