This module is used for writing unit tests for your applications, you can
access it with require('assert')
.
Throws an exception that displays the values for actual
and expected
separated by the provided operator.
Tests if value is a true
value, it is equivalent to assert.equal(true, value, message);
Tests shallow, coercive equality with the equal comparison operator ( ==
).
Tests shallow, coercive non-equality with the not equal comparison operator ( !=
).
Tests for deep equality.
Tests for any deep inequality.
Tests strict equality, as determined by the strict equality operator ( ===
)
Tests strict non-equality, as determined by the strict not equal operator ( !==
)
Expects block
to throw an error. error
can be constructor, regexp or
validation function.
Validate instanceof using constructor:
assert.throws(
function() { throw new Error("Wrong value"); }, Error );
Validate error message using RegExp:
assert.throws(
function() { throw new Error("Wrong value"); }, /value/ );
Custom error validation:
assert.throws(
function() { throw new Error("Wrong value"); }, function(err) { if ( (err instanceof Error) && /value/.test(err) ) { return true; } }, "unexpected error" );
Expects block
not to throw an error, see assert.throws for details.
Tests if value is not a false value, throws if it is a true value. Useful when
testing the first argument, error
in callbacks.