/*

* tst.verror.js: tests basic functionality of the VError class.
*/

var mod_assert = require('assert'); var mod_verror = require('../lib/verror');

var VError = mod_verror.VError; var WError = mod_verror.WError;

var err, suberr, stack, substack;

/*

* Remove full paths and relative line numbers from stack traces so that we can
* compare against "known-good" output.
*/

function cleanStack(stacktxt) {

var re = new RegExp(__filename + ':\\d+:\\d+', 'gm');
stacktxt = stacktxt.replace(re, 'tst.verror.js');
return (stacktxt);

}

/*

* Save the generic parts of all stack traces so we can avoid hardcoding
* Node-specific implementation details in our testing of stack traces.
*/

var nodestack = new Error().stack.split('n').slice(2).join('n');

/* no arguments */ err = new VError(); mod_assert.equal(err.name, 'VError'); mod_assert.ok(err instanceof Error); mod_assert.ok(err instanceof VError); mod_assert.equal(err.message, ''); mod_assert.ok(err.cause() === undefined); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

/* options-argument form */ err = new VError({}); mod_assert.equal(err.message, ''); mod_assert.ok(err.cause() === undefined);

/* simple message */ err = new VError('my error'); mod_assert.equal(err.message, 'my error'); mod_assert.ok(err.cause() === undefined); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: my error',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

err = new VError({}, 'my error'); mod_assert.equal(err.message, 'my error'); mod_assert.ok(err.cause() === undefined);

/* printf-style message */ err = new VError('%s error: %3d problems', 'very bad', 15); mod_assert.equal(err.message, 'very bad error: 15 problems'); mod_assert.ok(err.cause() === undefined);

err = new VError({}, '%s error: %3d problems', 'very bad', 15); mod_assert.equal(err.message, 'very bad error: 15 problems'); mod_assert.ok(err.cause() === undefined);

/* caused by another error, with no additional message */ suberr = new Error('root cause'); err = new VError(suberr); mod_assert.equal(err.message, ': root cause'); mod_assert.ok(err.cause() === suberr);

err = new VError({ 'cause': suberr }); mod_assert.equal(err.message, ': root cause'); mod_assert.ok(err.cause() === suberr);

/* caused by another error, with annotation */ err = new VError(suberr, 'proximate cause: %d issues', 3); mod_assert.equal(err.message, 'proximate cause: 3 issues: root cause'); mod_assert.ok(err.cause() === suberr); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: proximate cause: 3 issues: root cause',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

err = new VError({ 'cause': suberr }, 'proximate cause: %d issues', 3); mod_assert.equal(err.message, 'proximate cause: 3 issues: root cause'); mod_assert.ok(err.cause() === suberr); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: proximate cause: 3 issues: root cause',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

/* caused by another VError, with annotation. */ suberr = err; err = new VError(suberr, 'top'); mod_assert.equal(err.message, 'top: proximate cause: 3 issues: root cause'); mod_assert.ok(err.cause() === suberr);

err = new VError({ 'cause': suberr }, 'top'); mod_assert.equal(err.message, 'top: proximate cause: 3 issues: root cause'); mod_assert.ok(err.cause() === suberr);

/* caused by a WError */ suberr = new WError(new Error('root cause'), 'mid'); err = new VError(suberr, 'top'); mod_assert.equal(err.message, 'top: mid'); mod_assert.ok(err.cause() === suberr);

/* null cause (for backwards compatibility with older versions) */ err = new VError(null, 'my error'); mod_assert.equal(err.message, 'my error'); mod_assert.ok(err.cause() === undefined); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: my error',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

err = new VError({ 'cause': null }, 'my error'); mod_assert.equal(err.message, 'my error'); mod_assert.ok(err.cause() === undefined);

err = new VError(null); mod_assert.equal(err.message, ''); mod_assert.ok(err.cause() === undefined); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

/* constructorOpt */ function makeErr(options) {

return (new VError(options, 'test error'));

} err = makeErr({}); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: test error',
'    at makeErr (tst.verror.js)',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);

err = makeErr({ 'constructorOpt': makeErr }); stack = cleanStack(err.stack); mod_assert.equal(stack, [

'VError: test error',
'    at Object.<anonymous> (tst.verror.js)'

].join('n') + 'n' + nodestack);