node/doc/api/assert.markdown

Assert

This module is used for writing unit tests for your applications, you can access it with require('assert').

assert.fail(actual, expected, message, operator)

Tests if actual is equal to expected using the operator provided.

assert.ok(value, [message])

Tests if value is a true value, it is equivalent to assert.equal(true, value, message);

assert.equal(actual, expected, [message])

Tests shallow, coercive equality with the equal comparison operator ( == ).

assert.notEqual(actual, expected, [message])

Tests shallow, coercive non-equality with the not equal comparison operator ( != ).

assert.deepEqual(actual, expected, [message])

Tests for deep equality.

assert.notDeepEqual(actual, expected, [message])

Tests for any deep inequality.

assert.strictEqual(actual, expected, [message])

Tests strict equality, as determined by the strict equality operator ( === )

assert.notStrictEqual(actual, expected, [message])

Tests strict non-equality, as determined by the strict not equal operator ( !== )

assert.throws(block, [error], [message])

Expects block to throw an error.

assert.doesNotThrow(block, [error], [message])

Expects block not to throw an error.

assert.ifError(value)

Tests if value is not a false value, throws if it is a true value. Useful when testing the first argument, error in callbacks.