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easejs/test/warn/WarningTest.js

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2014-01-19 11:43:04 -05:00
/**
* Tests the Warning prototype
*
* Copyright (C) 2014 Free Software Foundation, Inc.
2014-01-19 11:43:04 -05:00
*
* This file is part of GNU ease.js.
*
* ease.js is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
require( 'common' ).testCase(
{
caseSetUp: function()
{
this.Sut = this.require( 'warn' ).Warning;
},
/**
* Warning should be a subtype of Error in an effort to ensure
* consistency and proper handling where Error is expected
*/
'Warning has Error prototype': function()
{
this.assertOk( new this.Sut( Error() ) instanceof Error );
},
/**
* Make clear that we're working with a warning
*/
'Warning should alter Error name': function()
{
this.assertEqual( this.Sut( Error() ).name, 'Warning' );
},
/**
* Just as with the other Error classes, as well as all ease.js classes,
* the 'new' operator should be optional when instantiating the class
*/
'`new\' operator is not necessary to instantiate Warning': function()
{
this.assertOk( this.Sut( Error( '' ) ) instanceof this.Sut );
},
/**
* Warning message should be taken from the exception passed to it
*/
'Warning message is set from wrapped exception': function()
{
var err = Error( 'oshit' );
// bug in FF (tested with 8.0) where, without accessing the message
// property in this test before passing it to Warning, err.message
// === "" within the Warning ctor. (Assignment is to silence Closure
// compiler warning.)
var _ = err.message;
var warning = this.Sut( err );
this.assertEqual( warning.message, err.message );
// this little trick prevents the compiler from optimizing away the
// assignment, which would break the test in certain versions of FF.
return _;
},
/**
* The whole point of Warning is to wrap an exception; so, ensure that
* one is wrapped.
*/
'Throws exception if no exception is wrapped': function()
{
var Sut = this.Sut;
this.assertThrows( function()
{
Sut( /* nothing provided to wrap */ );
}, TypeError );
this.assertThrows( function()
{
Sut( 'not an exception' );
}, TypeError );
},
/**
* We must provide access to the wrapped exception so that it can be
* properly handled; warning is only intended to provide additional
* information so that ease.js may handle it differently than other
* Error instances.
*/
'Can retrieve wrapped exception': function()
{
var err = Error( 'foo' ),
warning = this.Sut( err );
this.assertStrictEqual( err, warning.getError() );
},
} );