IoT.js-API-Assert.md

Assert module is for writing test for applications.

AssertionError

Assert module will produce AssertionError in case of assertion failure. AssertionError inherits standard Error thus it has properties provided by Error object including additional properties.

Properties

name

The name of AssertionError is 'AssertionError` this is fixed.

actual

This property contains the actual value.

expected

This property contains the expected value.

operator

This property contains the operator used for evaluating actual with expected.

message

The error message.

Assert

You can get assert module by require('assert') the module provide.

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

Throw an AssertionError exception.

assert(value, message)

Test if value is true, it throws an AssertionError exception if value evaluates false.

assert.equal(actual, expected, message)

Test if actual == expected is evaluated to true, if not, it throws an exception.

assert.notEqual(actual, expected, message)

Test if actual != expected is evaluated to true, if not, it throws an exception.

assert.strictEqual(actual, expected, message)

Test if actual === expected is evaluated to true, if not, it throws an exception.

assert.notStrictEqual(actual, expected, message)

Test if actual !== expected is evaluated to true, if not, it throws an exception.

assert.throws(block, expected, message)

Test if the given block throws an expected error, if not, it throws an exception.

assert.doesNotThrows(block, message)

Test if the given block does not throw any exception, if not, it throws an exception.