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158 lines
3.5 KiB
158 lines
3.5 KiB
var vows = require('vows')
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, toposort = require('./index')
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, assert = require('assert')
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var suite = vows.describe('toposort')
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suite.addBatch(
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{ 'acyclic graphs':
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{ topic: function() {
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/*(read downwards)
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6 3
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5->2
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4 1
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*/
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return toposort(
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[ ["3", '2']
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, ["2", "1"]
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, ["6", "5"]
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, ["5", "2"]
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, ["5", "4"]
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])
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}
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, 'should be sorted correctly': function(er, result) {
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assert.instanceOf(result, Array)
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var failed = [], passed
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// valid permutations
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;[ [ '3','6','5','2','1','4' ]
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, [ '3','6','5','2','4','1' ]
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, [ '6','3','5','2','1','4' ]
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, [ '6','5','3','2','1','4' ]
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, [ '6','5','3','2','4','1' ]
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, [ '6','5', '4','3','2','1' ]
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].forEach(function(solution) {
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try {
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assert.deepEqual(result, solution)
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passed = true
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}catch (e) {
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failed.push(e)
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}
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})
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if (!passed) {
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console.log(failed)
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throw failed[0];
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}
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}
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}
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, 'simple cyclic graphs':
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{ topic: function() {
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/*
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foo<->bar
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*/
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return toposort(
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[ ["foo", 'bar']
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, ["bar", "foo"]// cyclic dependecy
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])
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}
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, 'should throw an exception': function(_, val) {
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assert.instanceOf(val, Error)
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}
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}
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, 'complex cyclic graphs':
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{ topic: function() {
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/*
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foo
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bar<-john
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| ^
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ron->tom
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*/
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return toposort(
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[ ["foo", 'bar']
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, ["bar", "ron"]
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, ["john", "bar"]
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, ["tom", "john"]
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, ["ron", "tom"]// cyclic dependecy
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])
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}
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, 'should throw an exception': function(_, val) {
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assert.instanceOf(val, Error)
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}
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}
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, 'unknown nodes in edges':
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{ topic: function() {
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return toposort.array(['bla']
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[ ["foo", 'bar']
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, ["bar", "ron"]
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, ["john", "bar"]
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, ["tom", "john"]
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, ["ron", "tom"]
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])
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}
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, 'should throw an exception': function(_, val) {
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assert.instanceOf(val, Error)
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}
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}
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, 'triangular dependency':
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{ topic: function() {
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/*
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a-> b
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| /
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c<-
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*/
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return toposort([
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['a', 'b']
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, ['a', 'c']
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, ['b', 'c']
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]);
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}
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, 'shouldn\'t throw an error': function(er, result) {
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assert.deepEqual(result, ['a', 'b', 'c'])
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}
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}
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, 'toposort.array':
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{ topic: function() {
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return toposort.array(['d', 'c', 'a', 'b'], [['a','b'],['b','c']])
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}
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, 'should include unconnected nodes': function(er, result){
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var i = result.indexOf('d')
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assert(i >= 0)
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result.splice(i, 1)
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assert.deepEqual(result, ['a', 'b', 'c'])
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}
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}
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, 'toposort.array mutation':
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{ topic: function() {
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var array = ['d', 'c', 'a', 'b']
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toposort.array(array, [['a','b'],['b','c']])
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return array
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}
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, 'should not mutate its arguments': function(er, result){
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assert.deepEqual(result, ['d', 'c', 'a', 'b'])
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}
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}
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, 'giant graphs':
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{
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topic: function() {
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var graph = []
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, nodeCount = 10000
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for (var i = 0; i < nodeCount; i++) {
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graph.push([i, i + 1])
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}
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return graph
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}
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, 'should sort quickly': function(er, result){
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var start = (new Date).getTime()
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var sorted = toposort(result)
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var end = (new Date).getTime()
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var elapsedSeconds = (end - start) / 1000
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assert(elapsedSeconds < 1)
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}
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}
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})
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.run(null, function() {
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(suite.results.broken+suite.results.errored) > 0 && process.exit(1)
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process.exit(0)
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})
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