leannode-core/test/test.js

Simple Node.js wrapper for Lean 4 theorem prover

// ./test/test.js
const assert = require('assert');
const LeanRunner = require('../lib/index.js');

async function runTests() {
  console.log('Running leannode-core tests...\n');

  // Test 1: Basic evaluation
  try {
    const result = await LeanRunner.run('#eval 2 + 3');
    console.log('✓ Test 1: Basic evaluation');
    console.log(`  Output: "${result.stdout}"`);
    console.log(`  Exit code: ${result.exitCode}\n`);
  } catch (error) {
    console.log('✗ Test 1 failed:', error.message);
  }

  // Test 2: Simple definition
  try {
    const leanCode = `
def hello : String := "Hello from Lean!"
#eval hello
    `.trim();
    
    const result = await LeanRunner.run(leanCode);
    console.log('✓ Test 2: Simple definition');
    console.log(`  Output: "${result.stdout}"`);
    console.log(`  Exit code: ${result.exitCode}\n`);
  } catch (error) {
    console.log('✗ Test 2 failed:', error.message);
  }

  // Test 3: Error handling
  try {
    const result = await LeanRunner.run('invalid lean syntax here');
    console.log('✓ Test 3: Error handling');
    console.log(`  Stderr: "${result.stderr}"`);
    console.log(`  Exit code: ${result.exitCode}\n`);
  } catch (error) {
    console.log('✗ Test 3 failed:', error.message);
  }

  console.log('Tests completed!');
}

// Check if Lean is installed before running tests
async function checkLeanInstallation() {
  try {
    const result = await LeanRunner.run('#eval "Lean is working!"');
    if (result.exitCode === 0) {
      console.log('Lean 4 detected and working!\n');
      return true;
    }
  } catch (error) {
    console.log('❌ Lean 4 not found or not working.');
    console.log('Please install Lean 4 first: https://leanprover.github.io/');
    return false;
  }
}

// Run the tests
checkLeanInstallation().then(leanWorking => {
  if (leanWorking) {
    runTests();
  }
});