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What does the node:assert module provide, and how does it differ in purpose from a full testing framework?

Intermediate

Answer

assert provides basic assertion functions that throw an AssertionError when unmet -- a low-level building block used as the assertion layer inside test suites, but it doesn't provide test organization, running, or reporting the way a full framework like Jest does.
assert.strictEqual(2 + 2, 4);
assert.deepStrictEqual({ a: 1 }, { a: 1 });
Real-world example A team using node:test pairs it with node:assert for assertions, avoiding an external assertion library for a minimal, dependency-light testing setup.

Common follow-ups: How does assert.strictEqual() differ from assert.deepStrictEqual() when comparing objects?;Why might a team still choose Jest's or Chai's assertion syntax despite the added dependency?

Testing with Jest Mocha & the Node Test Runner;Error Handling
All 15 Core Node.js Modules questions