119 lines
3.3 KiB
JavaScript
119 lines
3.3 KiB
JavaScript
/**
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* Tests the Warning prototype
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*
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* Copyright (C) 2011, 2013 Mike Gerwitz
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var common = require( './common' ),
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assert = require( 'assert' ),
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Warning = common.require( 'warn' ).Warning
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;
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/**
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* Warning should be a subtype of Error
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*/
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( function testWarningIsAvailableAndHasErrorPrototype()
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{
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assert.ok( ( Warning( Error() ) instanceof Error ),
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"Warning should be an instance of Error"
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);
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} )();
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/**
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* Make clear that we're working with a warning
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*/
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( function testWarningShouldAlterErrorName()
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{
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assert.equal( Warning( Error() ).name, 'Warning',
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"Warning name should be properly set"
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);
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} )();
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/**
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* Just as with the other Error classes, as well as all ease.js classes, the
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* 'new' keyword should be optional when instantiating the class
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*/
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( function testNewKeywordIsNotRequiredForInstantiation()
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{
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assert.ok( Warning( Error( '' ) ) instanceof Warning,
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"'new' keyword should not be necessary to instantiate Warning"
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);
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} )();
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/**
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* Warning message should be taken from the exception passed to it
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*/
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( function testCanWarningMessageIsSetFromWrappedException()
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{
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var err = Error( 'oshit' );
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// bug in FF (tested with 8.0) where, without accessing the message property
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// in this test before passing it to Warning, err.message === "" within the
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// Warning ctor. (Assignment is to silence Closure compiler warning.)
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var _ = err.message;
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var warning = Warning( err );
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assert.equal( warning.message, err.message,
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"Warning message should be taken from wrapped exception"
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);
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// this little trick prevents the compiler from optimizing away the
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// assignment, which would break the test in certain versions of FF.
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return _;
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} )();
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/**
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* The whole point of Warning is to wrap an exception. So, ensure that one is
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* wrapped.
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*/
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( function testThrowsExceptionIfNoExceptionIsWrapped()
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{
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assert['throws']( function()
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{
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Warning( /* nothing provided to wrap */ );
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}, TypeError, "Exception should be thrown if no exception is provided" );
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assert['throws']( function()
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{
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Warning( 'not an exception' );
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}, TypeError, "Exception should be thrown if given value is not an Error" );
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} )();
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/**
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* We must provide access to the wrapped exception so that it can be properly
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* handled. Warning is only intended to provide additional information so that
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* ease.js may handle it differently than other Error instances.
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*/
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( function testCanRetrieveWrappedException()
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{
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var err = Error( 'foo' ),
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warning = Warning( err );
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assert.deepEqual( err, warning.getError(),
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"Can retrieve wrapped exception"
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);
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} )();
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