Test::Unit::Assert(3) User Contributed Perl DocumentationTest::Unit::Assert(3)NAMETest::Unit::Assert - unit testing framework assertion class
SYNOPSIS
# this class is not intended to be used directly,
# normally you get the functionality by subclassing from
# Test::Unit::TestCase
use Test::Unit::TestCase;
# more code here ...
$self->assert($your_condition_here, $your_optional_message_here);
# or, for regular expression comparisons:
$self->assert(qr/some_pattern/, $result);
# or, for functional style coderef tests:
$self->assert(sub {
$_[0] == $_[1]
or $self->fail("Expected $_[0], got $_[1]");
}, 1, 2);
# or, for old style regular expression comparisons
# (strongly deprecated; see warning below)
$self->assert(scalar("foo" =~ /bar/), $your_optional_message_here);
# Or, if you don't mind us guessing
$self->assert_equals('expected', $actual [, $optional_message]);
$self->assert_equals(1,$actual);
$self->assert_not_equals('not expected', $actual [, $optional_message]);
$self->assert_not_equals(0,1);
# Or, if you want to force the comparator
$self->assert_num_equals(1,1);
$self->assert_num_not_equals(1,0);
$self->assert_str_equals('string','string');
$self->assert_str_not_equals('stringA', 'stringB');
# assert defined/undefined status
$self->assert_null(undef);
$self->assert_not_null('');
DESCRIPTION
This class contains the various standard assertions used within the
framework. With the exception of the "assert(CODEREF, @ARGS)", all the
assertion methods take an optional message after the mandatory fields.
The message can either be a single string, or a list, which will get
concatenated.
Although you can specify a message, it is hoped that the default error
messages generated when an assertion fails will be good enough for most
cases.
Methods
assert_equals(EXPECTED, ACTUAL [, MESSAGE])
assert_not_equals(NOTEXPECTED, ACTUAL [, MESSAGE])
The catch all assertions of (in)equality. We make a guess about
whether to test for numeric or string (in)equality based on the
first argument. If it looks like a number then we do a numeric
test, if it looks like a string, we do a string test.
If the first argument is an object, we check to see if the '=='
operator has been overloaded and use that if it has, otherwise we
do the string test.
assert_num_equals
assert_num_not_equals
Force numeric comparison with these two.
assert_str_equals
assert_str_not_equals
Force string comparison
assert_matches(qr/PATTERN/, STRING [, MESSAGE])
assert_does_not_match(qr/PATTERN/, STRING [, MESSAGE])
Assert that STRING does or does not match the PATTERN regex.
assert_deep_equals(A, B [, MESSAGE ])
Assert that reference A is a deep copy of reference B. The
references can be complex, deep structures. If they are different,
the default message will display the place where they start
differing.
NOTE This is NOT well-tested on circular references. Nor am I
quite sure what will happen with filehandles.
assert_null(ARG [, MESSAGE])
assert_not_null(ARG [, MESSAGE])
Assert that ARG is defined or not defined.
assert(BOOLEAN [, MESSAGE])
Checks if the BOOLEAN expression returns a true value that is
neither a CODE ref nor a REGEXP. Note that MESSAGE is almost non
optional in this case, otherwise all the assertion has to go on is
the truth or otherwise of the boolean.
If you want to use the "old" style for testing regular expression
matching, please be aware of this: the arguments to assert() are
evaluated in list context, e.g. making a failing regex "pull" the
message into the place of the first argument. Since this is usually
just plain wrong, please use scalar() to force the regex comparison
to yield a useful boolean value.
assert(qr/PATTERN/, ACTUAL [, MESSAGE])
Matches ACTUAL against the PATTERN regex. If you omit MESSAGE, you
should get a sensible error message.
assert(CODEREF, @ARGS)
Calls CODEREF->(@ARGS). Assertion fails if this returns false (or
throws Test::Unit::Failure)
assert_raises(EXCEPTION_CLASS, CODEREF [, MESSAGE])
Calls CODEREF->(). Assertion fails unless an exception of class
EXCEPTION_CLASS is raised.
multi_assert(ASSERTION, @ARGSETS)
Calls $self->assert(ASSERTION, @$ARGSET) for each $ARGSET in
@ARGSETS.
ok(@ARGS)
Simulates the behaviour of the Test module. Deprecated.
AUTHOR
Copyright (c) 2000-2002, 2005 the PerlUnit Development Team (see
Test::Unit or the AUTHORS file included in this distribution).
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
· Test::Unit::Assertion
· Test::Unit::Assertion::Regexp
· Test::Unit::Assertion::CodeRef
· Test::Unit::Assertion::Boolean
· Test::Unit::TestCase
· Test::Unit::Exception
· The framework self-testing suite (t::tlib::AllTests)
perl v5.14.1 2005-10-15 Test::Unit::Assert(3)
