/*\
title: test-filters.js
type: application/javascript
tags: [[$:/tags/test-spec]]

Tests the filtering mechanism.

\*/
(function(){

/* jslint node: true, browser: true */
/* eslint-env node, browser, jasmine */
/* eslint no-mixed-spaces-and-tabs: ["error", "smart-tabs"]*/
/* global $tw, require */
"use strict";

describe("Filter tests", function() {

	// Test filter parsing
	it("should parse new-style rich operator suffixes", function() {
		expect($tw.wiki.parseFilter("[search:: four, , five,, six [operand]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ': four, , five,, six ', suffixes : [ [  ], [ 'four', 'five', 'six' ] ], operands: [ { text:'operand' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[search: one, two ,three :[operand]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' one, two ,three :', suffixes : [ [ 'one', 'two', 'three' ], [  ] ], operands: [ { text:'operand' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[search: one, two ,three :[operand]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' one, two ,three :', suffixes : [ [ 'one', 'two', 'three' ], [  ] ], operands: [ { text:'operand' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[search: one, two ,three : four, , five,, six [operand]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' one, two ,three : four, , five,, six ', suffixes : [ [ 'one', 'two', 'three' ], [ 'four', 'five', 'six' ] ], operands: [ { text:'operand' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[search: , : [operand]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' , : ', suffixes : [ [  ], [  ] ], operands: [ { text:'operand' } ] } ] } ]
		);
	});
	
	
	it("should parse multiple operands for operators", function() {
		expect($tw.wiki.parseFilter("[search: , : [operand],[operand2]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' , : ', suffixes : [ [  ], [  ] ], operands: [ { text:'operand' }, { text:'operand2' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[search: , : [oper,and],[operand2]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'search', suffix : ' , : ', suffixes : [ [  ], [  ] ], operands: [ { text:'oper,and' }, { text:'operand2' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[[GettingStarted]replace:[operand],[operand2]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'title', operands: [ { text:'GettingStarted' } ] },  { operator : 'replace', suffix : '', suffixes : [[]], operands: [ { text:'operand' }, { text:'operand2' }  ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[[GettingStarted]replace[operand],[operand2]split[-]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'title', operands: [{ text:'GettingStarted' }] },  { operator : 'replace', operands: [{ text:'operand' }, { text:'operand2' }] }, { operator : 'split', operands: [ { text:'-' } ] } ] } ]
		);
		expect($tw.wiki.parseFilter("[[GettingStarted]replace[operand],[operand2]split[-]split2[a],[b]]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'title', operands: [{ text:'GettingStarted' }] },  { operator : 'replace',  operands: [ { text:'operand' }, { text:'operand2' } ] }, { operator : 'split', operands: [ {text:'-'} ] }, { operator : 'split2', operands: [ { text:'a' }, { text: 'b' }] } ] } ]
		);
		expect($tw.wiki.parseFilter("[[GettingStarted]replace[operand],[operand2]split[-]split2[a],<b>,{c}]")).toEqual(
			[ { prefix : '', operators : [ { operator : 'title', operands: [{ text:'GettingStarted' }] },  { operator : 'replace',  operands: [ { text:'operand' }, { text:'operand2' } ] }, { operator : 'split', operands: [ {text:'-'} ] }, { operator : 'split2', operands: [ { text:'a' }, { variable: true, text: 'b' }, { indirect: true, text: 'c' }] } ] } ]
		);
	});

	describe("With no indexers", function() {
		var wiki = setupWiki({enableIndexers: []});
		it("should not create indexes when requested not to",function() {
			expect(wiki.getIndexer("FieldIndexer")).toBe(null);
		});
		runTests(wiki);
	});

	describe("With all indexers", function() {
		var wiki = setupWiki();
		if(wiki.getIndexer("FieldIndexer")) {
			wiki.getIndexer("FieldIndexer").setMaxIndexedValueLength(8); // Note that JoeBloggs is 9, and John is 5
		}
		runTests(wiki);
	});

function setupWiki(wikiOptions) {
	// Create a wiki
	var wiki = new $tw.Wiki(wikiOptions);
	// Add a plugin containing some shadow tiddlers
	var shadowTiddlers = {
		tiddlers: {
			"$:/TiddlerFive": {
				title: "$:/TiddlerFive",
				text: "Everything in federation",
				tags: ["two"]
			},
			"TiddlerSix": {
				title: "TiddlerSix",
				text: "Missing inaction from TiddlerOne",
				filter: "[[one]] [[a a]] [subfilter{hasList!!list}]",
				tags: []
			},
			"TiddlerSeventh": {
				title: "TiddlerSeventh",
				text: "",
				list: "TiddlerOne [[Tiddler Three]] [[a fourth tiddler]] MissingTiddler",
				tags: ["one"]
			},
			"Tiddler8": {
				title: "Tiddler8",
				text: "Tidd",
				tags: ["one"],
				"test-field": "JoeBloggs"
			}
		}
	};
	wiki.addTiddler({
		title: "$:/ShadowPlugin",
		text: JSON.stringify(shadowTiddlers),
		"plugin-type": "plugin",
		type: "application/json"});
	// Add a few  tiddlers
	wiki.addTiddler({
		title: "TiddlerOne",
		text: "The quick brown fox in $:/TiddlerTwo",
		tags: ["one"],
		cost: "123",
		value: "120",
		slug: "tiddler-one",
		authors: "Joe Bloggs",
		modifier: "JoeBloggs",
		modified: "201304152222"});
	wiki.addTiddler({
		title: "$:/TiddlerTwo",
		text: "The rain in Spain\nfalls mainly on the plain and [[a fourth tiddler]]",
		tags: ["two"],
		cost: "42",
		value: "190",
		slug: "tiddler-two",
		authors: "[[John Doe]]",
		modifier: "John",
		modified: "201304152211"});
	wiki.addTiddler({
		title: "Tiddler Three",
		text: "The speed of sound in light\n\nThere is no TiddlerZero but TiddlerSix",
		tags: ["one","two"],
		cost: "56",
		value: "80",
		modifier: "John",
		modified: "201304162202"});
	wiki.addTiddler({
		title: "a fourth tiddler",
		text: "The quality of mercy is not drained by [[Tiddler Three]]",
		tags: [],
		cost: "82",
		value: "72",
		empty: "not",
		modifier: "John"});
	wiki.addTiddler({
		title: "one",
		text: "This is the text of tiddler [[one]]",
		list: "[[Tiddler Three]] [[TiddlerOne]]",
		empty: "",
		modifier: "John"});
	wiki.addTiddler({
		title: "hasList",
		text: "This is the text of tiddler [[hasList]]",
		list: "[[Tiddler Three]] [[TiddlerOne]]",
		modifier: "PMario"});
	wiki.addTiddler({
		title: "has filter",
		text: "This is the text of tiddler [[has filter]]",
		filter: "[[Tiddler Three]] [[TiddlerOne]] [subfilter{hasList!!list}]",
		modifier: "PMario"});
	wiki.addTiddler({
		title: "filter regexp test",
		text: "Those strings have been used to create the `regexp = /[+|\-|~]?([[](?:[^\]])*\]+)|([+|-|~|\S]\S*)/;`",
		filter: "+aaa -bbb ~ccc aaaaaabbbbbbbbaa \"bb'b\" 'cc\"c' [[abc]] [[tiddler with spaces]] [is[test]] [is[te st]] a s df [enlist<hugo>] +[enlist:raw{test with spaces}] [enlist:raw{test with spaces}] [[a a]] [[ ] [ ]] [[ [hugo]] [subfilter{Story/Tower of Hanoi/A-C Sequence}]",
		modifier: "PMario"});
	// Unpack plugin tiddlers
	wiki.readPluginInfo();
	wiki.registerPluginTiddlers("plugin");
	wiki.unpackPluginTiddlers();
	wiki.addIndexersToWiki();
	return wiki;
}

// Our tests
function runTests(wiki) {

	it("should handle the enlist operator", function() {
		expect(wiki.filterTiddlers("[enlist[one two three]addsuffix[!]]").join(",")).toBe("one!,two!,three!");
	});
	
	it("should handle the enlist-input operator", function() {
		expect(wiki.filterTiddlers("[[one two three]enlist-input[]]").join(",")).toBe("one,two,three");
		expect(wiki.filterTiddlers("[[one two two three]enlist-input[]]").join(",")).toBe("one,two,three");
		expect(wiki.filterTiddlers("[[one two two three]enlist-input:dedupe[]]").join(",")).toBe("one,two,three");
		expect(wiki.filterTiddlers("[[one two two three]enlist-input:raw[]]").join(",")).toBe("one,two,two,three");
		expect(wiki.filterTiddlers("[[one two three]] [[four five six]] +[enlist-input[]]").join(",")).toBe("one,two,three,four,five,six");
		expect(wiki.filterTiddlers("[[one two three]] [[four five six]] [[seven eight]] +[enlist-input[]]").join(",")).toBe("one,two,three,four,five,six,seven,eight");
		expect(wiki.filterTiddlers("[[]] +[enlist-input[]]").join(",")).toBe("");
	});
	
	it("should handle the then and else operators", function() {
		expect(wiki.filterTiddlers("[modifier[JoeBloggs]then[Susi]]").join(",")).toBe("Susi");
		expect(wiki.filterTiddlers("[!modifier[JoeBloggs]then[Susi]]").join(",")).toBe("Susi,Susi,Susi,Susi,Susi,Susi,Susi,Susi");
		expect(wiki.filterTiddlers("[modifier[DaveBloggs]then[Susi]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[modifier[JoeBloggs]else[Susi]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[!modifier[JoeBloggs]else[Susi]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[modifier[DaveBloggs]else[Susi]]").join(",")).toBe("Susi");
	});

	it("should handle the ~ prefix", function() {
		expect(wiki.filterTiddlers("[modifier[JoeBloggs]] ~[[No such tiddler]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[modifier[Susi]] ~[[No such tiddler]]").join(",")).toBe("No such tiddler");
		expect(wiki.filterTiddlers("~[[No such tiddler]]").join(",")).toBe("No such tiddler");
		expect(wiki.filterTiddlers("[my-field[present]] ~[[No such tiddler]]").join(",")).toBe("No such tiddler");
	});

	it("should handle the lookup operator", function() {
		expect(wiki.filterTiddlers("Six Seventh 8 +[lookup[Tiddler]]").join(",")).toBe("Missing inaction from TiddlerOne,,Tidd");
		expect(wiki.filterTiddlers("Six Seventh 8 +[lookup:8[Tiddler]]").join(",")).toBe("Missing inaction from TiddlerOne,8,Tidd");
	});

	it("should retrieve shadow tiddlers", function() {
		expect(wiki.getTiddlerText("Tiddler8")).toBe("Tidd");
	});

	it("should handle the title operator", function() {
		expect(wiki.filterTiddlers("TiddlerOne [title[$:/TiddlerTwo]] [[Tiddler Three]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three");
		expect(wiki.filterTiddlers("[!title[Tiddler Three]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("TiddlerOne [title[$:/TiddlerTwo]] [[Tiddler Three]] [[A Missing Tiddler]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three,A Missing Tiddler");
	});

	it("should handle the field operator", function() {
		expect(wiki.filterTiddlers("[modifier[JoeBloggs]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[!modifier[JoeBloggs]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[!is[system]!modifier[JoeBloggs]]").join(",")).toBe("Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[field:modifier[JoeBloggs]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[!field:modifier[JoeBloggs]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[!is[system]!field:modifier[JoeBloggs]]").join(",")).toBe("Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[modifier[John]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one");
		expect(wiki.filterTiddlers("[!modifier[John]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[!is[system]!modifier[John]]").join(",")).toBe("TiddlerOne,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[field:modifier[John]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one");
		expect(wiki.filterTiddlers("[!field:modifier[John]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[!is[system]!field:modifier[John]]").join(",")).toBe("TiddlerOne,hasList,has filter,filter regexp test");
	});

	it("should handle the regexp operator", function() {
		expect(wiki.filterTiddlers("[regexp[id]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler");
		expect(wiki.filterTiddlers("[!regexp[id]]").join(",")).toBe("$:/ShadowPlugin,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[regexp[Tid]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three");
		expect(wiki.filterTiddlers("[regexp[(?i)Tid]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler");
		expect(wiki.filterTiddlers("[!regexp[Tid(?i)]]").join(",")).toBe("$:/ShadowPlugin,one,hasList,has filter,filter regexp test");
	});

	// The following 2 tests should write a log -> WARNING: Filter modifier has a deprecated regexp operand XXXX
	// The test should pass anyway.
	it("should handle the field operator with a regular expression operand", function() {
		expect(wiki.filterTiddlers("[modifier/JoeBloggs/]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[modifier/Jo/]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one");
	});

	it("should handle the prefix operator", function() {
		expect(wiki.filterTiddlers("[prefix[Tiddler]]").join(",")).toBe("TiddlerOne,Tiddler Three");
		expect(wiki.filterTiddlers("[prefix[nothing]]").join(",")).toBe("");
	});

	it("should handle the sort and sortcs operators", function() {
		expect(wiki.filterTiddlers("[sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[!sort[title]]").join(",")).toBe("TiddlerOne,Tiddler Three,one,hasList,has filter,filter regexp test,a fourth tiddler,$:/TiddlerTwo,$:/ShadowPlugin");
		// Temporarily commenting out the following two lines because of platform differences for localeCompare between the browser and Node.js
		// expect(wiki.filterTiddlers("[sortcs[title]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne,a fourth tiddler,one");
		// expect(wiki.filterTiddlers("[!sortcs[title]]").join(",")).toBe("one,a fourth tiddler,TiddlerOne,Tiddler Three,$:/TiddlerTwo");
	});

	it("should handle the reverse, first, last, butfirst, butlast, rest and nth operators", function() {
		expect(wiki.filterTiddlers("[sort[title]first[]]").join(",")).toBe("$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[sort[title]first[2]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo");
		expect(wiki.filterTiddlers("[sort[title]first[8]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three");
		expect(wiki.filterTiddlers("[sort[title]first[x]]").join(",")).toBe("$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[sort[title]last[]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]last[2]]").join(",")).toBe("Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]last[8]]").join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]last[x]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]reverse[]]").join(",")).toBe("TiddlerOne,Tiddler Three,one,hasList,has filter,filter regexp test,a fourth tiddler,$:/TiddlerTwo,$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[sort[title]reverse[x]]").join(",")).toBe("TiddlerOne,Tiddler Three,one,hasList,has filter,filter regexp test,a fourth tiddler,$:/TiddlerTwo,$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[sort[title]butlast[]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three");
		expect(wiki.filterTiddlers("[sort[title]butlast[2]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one");
		expect(wiki.filterTiddlers("[sort[title]butlast[11]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[sort[title]butlast[x]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three");
		expect(wiki.filterTiddlers("[sort[title]rest[]]").join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]rest[2]]").join(",")).toBe("a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]rest[11]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[sort[title]rest[x]]").join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[sort[title]nth[]]").join(",")).toBe("$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[sort[title]nth[2]]").join(",")).toBe("$:/TiddlerTwo");
		expect(wiki.filterTiddlers("[sort[title]nth[11]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[sort[title]nth[x]]").join(",")).toBe("$:/ShadowPlugin");
	});

	it("should handle the tag operator", function() {
		expect(wiki.filterTiddlers("[tag[one]sort[title]]").join(",")).toBe("Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[!tag[one]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one");
		expect(wiki.filterTiddlers("[prefix[Tidd]tag[one]sort[title]]").join(",")).toBe("Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[!is[shadow]tag[two]sort[title]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three");
		expect(wiki.filterTiddlers("[all[shadows]tag[two]sort[title]]").join(",")).toBe("$:/TiddlerFive");
	});

	it("should handle the all operator with field, has and tag operators", function() {
		expect(wiki.filterTiddlers("[all[shadows]tag[two]]").join(",")).toBe("$:/TiddlerFive");
		expect(wiki.filterTiddlers("[all[shadows+tiddlers]tag[two]]").join(",")).toBe("$:/TiddlerFive,$:/TiddlerTwo,Tiddler Three");
		expect(wiki.filterTiddlers("[all[tiddlers+shadows]tag[two]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,$:/TiddlerFive");
		expect(wiki.filterTiddlers("[all[shadows+tiddlers]]").join(",")).toBe("$:/TiddlerFive,TiddlerSix,TiddlerSeventh,Tiddler8,$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[all[tiddlers+shadows]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test,$:/TiddlerFive,TiddlerSix,TiddlerSeventh,Tiddler8");
		expect(wiki.filterTiddlers("[all[tiddlers]tag[two]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three");
		expect(wiki.filterTiddlers("[all[orphans+tiddlers+tags]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,hasList,has filter,filter regexp test,two,one");
	});

	it("should handle the tags operator", function() {
		expect(wiki.filterTiddlers("[tags[]sort[title]]").join(",")).toBe("one,two");
		expect(wiki.filterTiddlers("[[TiddlerOne]tags[]sort[title]]").join(",")).toBe("one");
	});

	it("should handle the match operator", function() {
		expect(wiki.filterTiddlers("[match[TiddlerOne]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("TiddlerOne TiddlerOne =[match[TiddlerOne]]").join(",")).toBe("TiddlerOne,TiddlerOne");
		expect(wiki.filterTiddlers("[!match[TiddlerOne]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[match:casesensitive[tiddlerone]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[!match:casesensitive[tiddlerone]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
		expect(wiki.filterTiddlers("[match:caseinsensitive[tiddlerone]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[!match:caseinsensitive[tiddlerone]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
	});

	it("should handle the tagging operator", function() {
		expect(wiki.filterTiddlers("[[one]tagging[]sort[title]]").join(",")).toBe("Tiddler Three,Tiddler8,TiddlerOne,TiddlerSeventh");
		expect(wiki.filterTiddlers("[[one]tagging[]]").join(",")).toBe("Tiddler Three,TiddlerOne,TiddlerSeventh,Tiddler8");
		expect(wiki.filterTiddlers("[[two]tagging[]sort[title]]").join(",")).toBe("$:/TiddlerFive,$:/TiddlerTwo,Tiddler Three");
		var fakeWidget = {getVariable: function() {return "one";}};
		expect(wiki.filterTiddlers("[all[current]tagging[]]",fakeWidget).join(",")).toBe("Tiddler Three,TiddlerOne,TiddlerSeventh,Tiddler8");
	});

	it("should handle the untagged operator", function() {
		expect(wiki.filterTiddlers("[untagged[]sort[title]]").join(",")).toBe("$:/ShadowPlugin,a fourth tiddler,filter regexp test,has filter,hasList,one");
		expect(wiki.filterTiddlers("[!untagged[]sort[title]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne");
	});

	it("should handle the links operator", function() {
		expect(wiki.filterTiddlers("[!is[shadow]links[]sort[title]]").join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,has filter,hasList,one,Tiddler Three,TiddlerSix,TiddlerZero");
		expect(wiki.filterTiddlers("[all[shadows]links[]sort[title]]").join(",")).toBe("TiddlerOne");
	});

	it("should handle the backlinks operator", function() {
		expect(wiki.filterTiddlers("[!is[shadow]backlinks[]sort[title]]").join(",")).toBe("a fourth tiddler,has filter,hasList,one,TiddlerOne");
		expect(wiki.filterTiddlers("[all[shadows]backlinks[]sort[title]]").join(",")).toBe("Tiddler Three");
	});

	it("should handle the has operator", function() {
		expect(wiki.filterTiddlers("[has[modified]sort[title]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[!has[modified]sort[title]]").join(",")).toBe("$:/ShadowPlugin,a fourth tiddler,filter regexp test,has filter,hasList,one");
		expect(wiki.filterTiddlers("[has[tags]sort[title]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[!has[tags]sort[title]]").join(",")).toBe("$:/ShadowPlugin,a fourth tiddler,filter regexp test,has filter,hasList,one");
	});

	it("should handle the has:field operator", function() {
		expect(wiki.filterTiddlers("[has:field[empty]sort[title]]").join(",")).toBe("a fourth tiddler,one");
		expect(wiki.filterTiddlers("[!has:field[empty]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,filter regexp test,has filter,hasList,Tiddler Three,TiddlerOne");
	});


	it("should handle the limit operator", function() {
		expect(wiki.filterTiddlers("[!is[system]sort[title]limit[2]]").join(",")).toBe("a fourth tiddler,filter regexp test");
		expect(wiki.filterTiddlers("[prefix[Tid]sort[title]limit[1]]").join(",")).toBe("Tiddler Three");
		expect(wiki.filterTiddlers("[prefix[Tid]sort[title]!limit[1]]").join(",")).toBe("TiddlerOne");
	});

	it("should handle the list operator", function() {
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]sort[title]]").join(",")).toBe("a fourth tiddler,MissingTiddler,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[tag[one]list[TiddlerSeventh]sort[title]]").join(",")).toBe("a fourth tiddler,MissingTiddler,Tiddler Three,TiddlerOne");
	});

	it("should handle the next operator", function() {
		expect(wiki.filterTiddlers("[[Tiddler Three]next[TiddlerSeventh]]").join(",")).toBe("a fourth tiddler");
		expect(wiki.filterTiddlers("[[MissingTiddler]next[TiddlerSeventh]]").join(",")).toBe("");
	});

	it("should handle the previous operator", function() {
		expect(wiki.filterTiddlers("[[Tiddler Three]previous[TiddlerSeventh]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[[TiddlerOne]previous[TiddlerSeventh]]").join(",")).toBe("");
	});

	it("should handle the search operator", function() {
		expect(wiki.filterTiddlers("[search[the]sort[title]]").join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[search{Tiddler8}sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,has filter,hasList,one,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[search:modifier[og]sort[title]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[search:modifier,authors:casesensitive[Do]sort[title]]").join(",")).toBe("$:/TiddlerTwo");
		expect(wiki.filterTiddlers("[search:modifier,authors:casesensitive[do]sort[title]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[search:authors:casesensitive,whitespace[John    Doe]sort[title]]").join(",")).toBe("$:/TiddlerTwo");
		expect(wiki.filterTiddlers("[search:modifier:regexp[(d|bl)o(ggs|e)]sort[title]]").join(",")).toBe("TiddlerOne");
		expect(wiki.filterTiddlers("[search:-modifier,authors:[g]sort[title]]").join(",")).toBe("$:/ShadowPlugin,filter regexp test,Tiddler Three");
		expect(wiki.filterTiddlers("[search:*:[g]sort[title]]").join(",")).toBe("$:/ShadowPlugin,filter regexp test,Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[search:text:anchored[the]]").join(",")).toBe("TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler");
	});

	it("should yield search results that have search tokens spread across different fields", function() {
		expect(wiki.filterTiddlers("[search[fox one]sort[title]]").join(",")).toBe("TiddlerOne");
	});

	it("should handle the each operator", function() {
		expect(wiki.filterTiddlers("[each[modifier]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,hasList,TiddlerOne");
		expect(wiki.filterTiddlers("[each:list-item[tags]sort[title]]").join(",")).toBe("one,two");
		expect(wiki.filterTiddlers("[each:list-item[authors]sort[title]]").join(",")).toBe("Bloggs,Joe,John Doe");
	});

	it("should handle the eachday operator", function() {
		expect(wiki.filterTiddlers("[eachday[modified]sort[title]]").join(",")).toBe("Tiddler Three,TiddlerOne");
	});

	it("should handle the sameday operator", function() {
		expect(wiki.filterTiddlers("[sameday[201304152200]sort[title]]").join(",")).toBe("$:/TiddlerTwo,TiddlerOne");
	});

	describe("testing the is operator",function() {

		it("should handle the '[is[current]]' operator", function() {
		var fakeWidget = {getVariable: function() {return "Tiddler Three";}};
			expect(wiki.filterTiddlers("[is[current]]",fakeWidget).join(",")).toBe("Tiddler Three");
			expect(wiki.filterTiddlers("[[Tiddler Three]is[current]]",fakeWidget).join(",")).toBe("Tiddler Three");
			expect(wiki.filterTiddlers("[[$:/TiddlerTwo]is[current]]",fakeWidget).join(",")).toBe("");
			expect(wiki.filterTiddlers("[!is[current]sort[title]]",fakeWidget).join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,TiddlerOne");
		});

		it("should handle the '[is[system]]' operator", function() {
			expect(wiki.filterTiddlers("[is[system]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo");
			expect(wiki.filterTiddlers("[!is[system]sort[title]]").join(",")).toBe("a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		});

		it("should handle the '[is[shadow]]' operator", function() {
			expect(wiki.filterTiddlers("[all[shadows]sort[title]]").join(",")).toBe("$:/TiddlerFive,Tiddler8,TiddlerSeventh,TiddlerSix");
			expect(wiki.filterTiddlers("[!is[shadow]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
		});

		it("should handle the '[is[missing]]' operator", function() {
			expect(wiki.filterTiddlers("[all[]]").join(",")).toBe("$:/ShadowPlugin,TiddlerOne,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,one,hasList,has filter,filter regexp test");
			expect(wiki.filterTiddlers("[all[missing]]").join(",")).toBe("TiddlerZero");
			expect(wiki.filterTiddlers("[!is[missing]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,Tiddler Three,TiddlerOne");
			expect(wiki.filterTiddlers("[[TiddlerOne]is[missing]]").join(",")).toBe("");
			expect(wiki.filterTiddlers("[[TiddlerZero]is[missing]]").join(",")).toBe("TiddlerZero");
			expect(wiki.filterTiddlers("[!title[Tiddler Three]is[missing]]").join(",")).toBe("");
			expect(wiki.filterTiddlers("[!title[Tiddler Three]!is[missing]sort[title]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,a fourth tiddler,filter regexp test,has filter,hasList,one,TiddlerOne");
		});

		it("should handle the '[is[orphan]]' operator", function() {
			expect(wiki.filterTiddlers("[is[orphan]sort[title]]").join(",")).toBe("a fourth tiddler,filter regexp test,TiddlerOne");
			expect(wiki.filterTiddlers("[!is[orphan]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,one,hasList,has filter");
			expect(wiki.filterTiddlers("[[TiddlerOne]is[orphan]]").join(",")).toBe("TiddlerOne");
			expect(wiki.filterTiddlers("[[TiddlerOne]!is[orphan]]").join(",")).toBe("");
			expect(wiki.filterTiddlers("[!title[Tiddler Three]is[orphan]sort[title]]").join(",")).toBe("a fourth tiddler,filter regexp test,TiddlerOne");
			expect(wiki.filterTiddlers("[!title[Tiddler Three]!is[orphan]]").join(",")).toBe("$:/ShadowPlugin,$:/TiddlerTwo,one,hasList,has filter");
		});

	});

	it("should handle the operand prefixes", function() {
		expect(wiki.filterTiddlers("[prefix[Tiddler]] +[sort[title]]").join(",")).toBe("Tiddler Three,TiddlerOne");
	});

	it("should handle indirect operands", function() {
		expect(wiki.filterTiddlers("[prefix{Tiddler8}] +[sort[title]]").join(",")).toBe("Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[modifier{Tiddler8!!test-field}] +[sort[title]]").join(",")).toBe("TiddlerOne");
		var fakeWidget = {wiki: wiki, getVariable: function() {return "Tiddler Three";}};
		expect(wiki.filterTiddlers("[modifier{!!modifier}] +[sort[title]]",fakeWidget).join(",")).toBe("$:/TiddlerTwo,a fourth tiddler,one,Tiddler Three");
	});

	it("should handle variable operands", function() {

		var widget = require("$:/core/modules/widgets/widget.js");
	// Create a root widget for attaching event handlers. By using it as the parentWidget for another widget tree, one can reuse the event handlers
		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
										   { wiki:wiki, document:$tw.document});
		rootWidget.makeChildWidgets();
		var anchorWidget = rootWidget.children[0];
		rootWidget.setVariable("myVar","Tidd");
		rootWidget.setVariable("myVar2","JoeBloggs");
		expect(wiki.filterTiddlers("[prefix<myVar>] +[sort[title]]",anchorWidget).join(",")).toBe("Tiddler Three,TiddlerOne");
		expect(wiki.filterTiddlers("[modifier<myVar2>] +[sort[title]]",anchorWidget).join(",")).toBe("TiddlerOne");
	});

	it("should handle the before and after operators", function() {
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]after[TiddlerOne]]").join(",")).toBe("Tiddler Three");
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]after[a fourth tiddler]]").join(",")).toBe("MissingTiddler");
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]after[MissingTiddler]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]before[TiddlerOne]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]before[a fourth tiddler]]").join(",")).toBe("Tiddler Three");
		expect(wiki.filterTiddlers("[list[TiddlerSeventh]before[MissingTiddler]]").join(",")).toBe("a fourth tiddler");
	});

	it("should handle the string operators", function() {
		expect(wiki.filterTiddlers("John Paul George Ringo +[length[]]").join(",")).toBe("4,4,6,5");
		expect(wiki.filterTiddlers("John Paul George Ringo +[uppercase[]]").join(",")).toBe("JOHN,PAUL,GEORGE,RINGO");
		expect(wiki.filterTiddlers("John Paul George Ringo +[lowercase[]]").join(",")).toBe("john,paul,george,ringo");
		expect(wiki.filterTiddlers("John Paul George Ringo +[split[]]").join(",")).toBe("J,o,h,n,P,a,u,l,G,e,o,r,g,e,R,i,n,g,o");
		expect(wiki.filterTiddlers("[[John. Paul. George. Ringo.]] +[split[.]trim[]]").join(",")).toBe("John,Paul,George,Ringo,");
		expect(wiki.filterTiddlers("John Paul George Ringo +[split[e]]").join(",")).toBe("John,Paul,G,org,,Ringo");
		expect(wiki.filterTiddlers("John Paul George Ringo +[join[ ]split[e]join[ee]split[ ]]").join(",")).toBe("John,Paul,Geeorgee,Ringo");
		// Ensure that join doesn't return null if passed empty list
		expect(wiki.filterTiddlers("Test +[butlast[]join[ ]]")).toEqual([]);
		// Ensure that join correctly handles empty strings in source
		expect(wiki.filterTiddlers("[[]] Paul +[join[-]]").join(",")).toBe("-Paul");
		expect(wiki.filterTiddlers("[[ John ]] [[Paul ]] [[ George]] Ringo +[trim[]join[-]]").join(",")).toBe("John-Paul-George-Ringo");
		expect(wiki.filterTiddlers("[[ abc ]] [[def ]] [[ ghi]] +[trim[]]").join(",")).toBe("abc,def,ghi");
		expect(wiki.filterTiddlers("[[ abc ]] [[def ]] [[ ghi]] +[trim:prefix[]]").join(",")).toBe("abc ,def ,ghi");
		expect(wiki.filterTiddlers("[[ abc ]] [[def ]] [[ ghi]] +[trim:suffix[]]").join(",")).toBe(" abc,def, ghi");
		expect(wiki.filterTiddlers("[[ abacus ]] [[ baobab ]] +[trim[ab]]").join(",")).toBe(" abacus , baobab ");
		expect(wiki.filterTiddlers("[[ abacus ]] [[ baobab ]] +[trim[a]]").join(",")).toBe(" abacus , baobab ");
		expect(wiki.filterTiddlers("abacus baobab +[trim[a]]").join(",")).toBe("bacus,baobab");
		expect(wiki.filterTiddlers("abacus baobab +[trim[ab]]").join(",")).toBe("acus,baob");
		expect(wiki.filterTiddlers("abacus baobab +[trim:prefix[ab]]").join(",")).toBe("acus,baobab");
		expect(wiki.filterTiddlers("abacus baobab +[trim:suffix[ab]]").join(",")).toBe("abacus,baob");
		// Trim doesn't hiccup on regexp special characters
		expect(wiki.filterTiddlers("[[.*abacus.*]] [[.+baobab.+]] +[trim[.*]]").join(",")).toBe("abacus,.+baobab.+");
		expect(wiki.filterTiddlers("[[.*abacus.*]] [[.+baobab.+]] +[trim[.+]]").join(",")).toBe(".*abacus.*,baobab");
	});

	it("should handle the mathematics operators", function() {
		expect(wiki.filterTiddlers("[[2]add[2]]").join(",")).toBe("4");
		expect(wiki.filterTiddlers("[[4]subtract[2]]").join(",")).toBe("2");
		expect(wiki.filterTiddlers("[[24]divide[8]]").join(",")).toBe("3");
		expect(wiki.filterTiddlers("[[355]divide[113]sign[]multiply[4]]").join(",")).toBe("4");
		expect(wiki.filterTiddlers("[[355]divide[113]add[0.5]round[]multiply[4]]").join(",")).toBe("16");
		expect(wiki.filterTiddlers("1 2 3 4 +[sum[]]").join(",")).toBe("10");
		expect(wiki.filterTiddlers("1 2 3 4 +[product[]]").join(",")).toBe("24");
		expect(wiki.filterTiddlers("1 2 3 4 +[maxall[]]").join(",")).toBe("4");
		expect(wiki.filterTiddlers("1 2 3 4 +[minall[]]").join(",")).toBe("1");
		expect(wiki.filterTiddlers("1 2 3 4 +[max[2]]").join(",")).toBe("2,2,3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[min[2]]").join(",")).toBe("1,2,2,2");
	});

/* listops filters */
	
	it("should handle the allafter operator", function() {
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[1]]").join(",")).toBe("2,3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[1]]").join(",")).toBe("1,2,3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[2]]").join(",")).toBe("3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[2]]").join(",")).toBe("2,3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[3]]").join(",")).toBe("4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[3]]").join(",")).toBe("3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[4]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[4]]").join(",")).toBe("4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter[5]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allafter:include[5]]").join(",")).toBe("");
	});

	it("should handle the allbefore operator", function() {
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[1]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[1]]").join(",")).toBe("1");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[2]]").join(",")).toBe("1");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[2]]").join(",")).toBe("1,2");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[3]]").join(",")).toBe("1,2");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[3]]").join(",")).toBe("1,2,3");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[4]]").join(",")).toBe("1,2,3");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[4]]").join(",")).toBe("1,2,3,4");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore[5]]").join(",")).toBe("");
		expect(wiki.filterTiddlers("1 2 3 4 +[allbefore:include[5]]").join(",")).toBe("");
	});

	it("should handle the append operator", function() {
		expect(wiki.filterTiddlers("a b c +[append[d e]]").join(",")).toBe("a,b,c,d,e");
		expect(wiki.filterTiddlers("a b c +[append:1[d e]]").join(",")).toBe("a,b,c,d");
		expect(wiki.filterTiddlers("a b c +[append{TiddlerSeventh!!list}]").join(",")).toBe("a,b,c,TiddlerOne,Tiddler Three,a fourth tiddler,MissingTiddler");
		expect(wiki.filterTiddlers("a b c +[append:2{TiddlerSeventh!!list}]").join(",")).toBe("a,b,c,TiddlerOne,Tiddler Three");
		
		expect(wiki.filterTiddlers("a [[b c]] +[append{TiddlerSix!!filter}]").join(",")).toBe("a,b c,one,a a,[subfilter{hasList!!list}]");
	});

	it("should handle the insertbefore operator", function() {
		var widget = require("$:/core/modules/widgets/widget.js");
		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
										   { wiki:wiki, document:$tw.document});
		rootWidget.makeChildWidgets();
		var anchorWidget = rootWidget.children[0];
		rootWidget.setVariable("myVar","c");
		rootWidget.setVariable("tidTitle","e");
		rootWidget.setVariable("tidList","one tid with spaces");
		
		expect(wiki.filterTiddlers("a b c d e f +[insertbefore:myVar[f]]",anchorWidget).join(",")).toBe("a,b,f,c,d,e");
		expect(wiki.filterTiddlers("a b c d e f +[insertbefore:myVar<tidTitle>]",anchorWidget).join(",")).toBe("a,b,e,c,d,f");
		expect(wiki.filterTiddlers("a b c d e f +[insertbefore:myVar[gg gg]]",anchorWidget).join(",")).toBe("a,b,gg gg,c,d,e,f");
		
		expect(wiki.filterTiddlers("a b c d e +[insertbefore:myVar<tidList>]",anchorWidget).join(",")).toBe("a,b,one tid with spaces,c,d,e");
		expect(wiki.filterTiddlers("a b c d e f +[insertbefore:tidTitle{TiddlerOne!!tags}]",anchorWidget).join(",")).toBe("a,b,c,d,one,e,f");

		// Next 2 tests do weired things, but will pass - there for compatibility reasons
		expect(wiki.filterTiddlers("a b c [[with space]] +[insertbefore[b]]").join(",")).toBe("a,c,with space,b");
		expect(wiki.filterTiddlers("a b c d e +[insertbefore:2[b]]").join(",")).toBe("a,c,d,e,b");
	});

	it("should handle the move operator", function() {
		expect(wiki.filterTiddlers("a b c d e +[move[c]]").join(",")).toBe("a,b,d,c,e");
		expect(wiki.filterTiddlers("a b c d e +[move:2[c]]").join(",")).toBe("a,b,d,e,c");
		expect(wiki.filterTiddlers("a b c d e +[move:10[c]]").join(",")).toBe("a,b,d,e,c");
		expect(wiki.filterTiddlers("a b c d e +[move:-1[c]]").join(",")).toBe("a,c,b,d,e");
		expect(wiki.filterTiddlers("a b c d e +[move:-5[c]]").join(",")).toBe("c,a,b,d,e");
	});

	it("should handle the prepend operator", function() {
		expect(wiki.filterTiddlers("a b c +[prepend[dd ee]]").join(",")).toBe("dd,ee,a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:3[ff gg]]").join(",")).toBe("ff,gg,a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:1[hh ii]]").join(",")).toBe("hh,a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:0[jj kk]]").join(",")).toBe("a,b,c");
		
		expect(wiki.filterTiddlers("a b c +[prepend:-0[ll mm]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:-1[nn oo pp qq]]").join(",")).toBe("nn,oo,pp,a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:-2[rr ss tt uu]]").join(",")).toBe("rr,ss,a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:-4[rr ss tt uu]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[prepend:-5[vv ww xx yy]]").join(",")).toBe("a,b,c");
	});

	it("should handle the putafter operator", function() {
		expect(wiki.filterTiddlers("a b c dd ee +[putafter[b]]").join(",")).toBe("a,b,ee,c,dd");
		expect(wiki.filterTiddlers("a b c dd ee +[putafter:1[b]]").join(",")).toBe("a,b,ee,c,dd");
		expect(wiki.filterTiddlers("a b c dd ee +[putafter:2[b]]").join(",")).toBe("a,b,dd,ee,c");
		expect(wiki.filterTiddlers("a b c dd ee +[putafter:3[b]]").join(",")).toBe("a,b,c,dd,ee");
		// It starts to duplicate elements
		expect(wiki.filterTiddlers("a b c dd ee +[putafter:4[b]]").join(",")).toBe("a,b,b,c,dd,ee");
		expect(wiki.filterTiddlers("a b c dd ee +[putafter:5[b]]").join(",")).toBe("a,b,a,b,c,dd,ee");
		// There are only 5 elements in the input
		expect(wiki.filterTiddlers("a b c ff gg +[putafter:6[b]]").join(",")).toBe("a,b,a,b,c,ff,gg");

		// -1 starts to "eat" elements for the left and duplicates b
		expect(wiki.filterTiddlers("a b c hh ii +[putafter:-1[b]]").join(",")).toBe("a,b,b,c,hh,ii");
		// -2 moves c, hh, ii behind b, which is not visible
		expect(wiki.filterTiddlers("a b c hh ii +[putafter:-2[b]]").join(",")).toBe("a,b,c,hh,ii");
		// only ii is used from input and it's moved behind b
		expect(wiki.filterTiddlers("a b c hh ii +[putafter:-4[b]]").join(",")).toBe("a,b,ii,c,hh");
		// wasting time, because there are only 5 elements
		expect(wiki.filterTiddlers("a b c hh ii +[putafter:-5[b]]").join(",")).toBe("a,b,c,hh,ii");
		// there are only 5 elements
		expect(wiki.filterTiddlers("a b c hh ii +[putafter:-10[b]]").join(",")).toBe("a,b,c,hh,ii");

		// use NAN uses default = 1
		expect(wiki.filterTiddlers("a b c jj kk +[putafter:NAN[b]]").join(",")).toBe("a,b,kk,c,jj");
	});

	it("should handle the putbefore operator", function() {
		expect(wiki.filterTiddlers("a b c dd +[putbefore[b]]").join(",")).toBe("a,dd,b,c");
		expect(wiki.filterTiddlers("a b c ff +[putbefore:1[b]]").join(",")).toBe("a,ff,b,c");
		expect(wiki.filterTiddlers("a b c gg +[putbefore:2[b]]").join(",")).toBe("a,c,gg,b");

		expect(wiki.filterTiddlers("a b c [[g g]] +[putbefore:2[b]]").join(",")).toBe("a,c,g g,b");

		// this one is strange
		expect(wiki.filterTiddlers("a b c ee +[putbefore:0[b]]").join(",")).toBe("a,a,b,c,ee");
		
		// b is not part of the list anymore, so it will be appended at the end ???
		expect(wiki.filterTiddlers("a b c hh +[putbefore:3[b]]").join(",")).toBe("a,b,c,hh");
		expect(wiki.filterTiddlers("a b c ii +[putbefore:4[b]]").join(",")).toBe("a,a,b,c,ii");
		
		// ????
		expect(wiki.filterTiddlers("a b c ii +[putbefore:10[b]]").join(",")).toBe("a,a,b,c,ii");
		
		expect(wiki.filterTiddlers("a b c kk +[putbefore:-1[b]]").join(",")).toBe("a,b,c,kk");
		expect(wiki.filterTiddlers("a b c ll +[putbefore:-2[b]]").join(",")).toBe("a,c,ll,b");
		
		expect(wiki.filterTiddlers("a b c mm +[putbefore:-3[b]]").join(",")).toBe("a,mm,b,c");
		
		expect(wiki.filterTiddlers("a b c nn +[putbefore:-10[b]]").join(",")).toBe("a,b,c,nn");
	});

	it("should handle the putfirst operator", function() {
		expect(wiki.filterTiddlers("a b c +[putfirst[a b]]").join(",")).toBe("c,a,b");
		expect(wiki.filterTiddlers("a b c +[putfirst[]]").join(",")).toBe("c,a,b");
		expect(wiki.filterTiddlers("a b c +[putfirst:2[]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putfirst:3[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putfirst:4[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putfirst:-0[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putfirst:-1[]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putfirst:-2[]]").join(",")).toBe("c,a,b");
		expect(wiki.filterTiddlers("a b c +[putfirst:-4[]]").join(",")).toBe("a,b,c");
	});

	it("should handle the putlast operator", function() {
		expect(wiki.filterTiddlers("a b c +[putlast[d e]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putlast[]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putlast:1[]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putlast:2[]]").join(",")).toBe("c,a,b");
		expect(wiki.filterTiddlers("a b c +[putlast:3[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putlast:4[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putlast:-0[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putlast:0[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[putlast:-1[]]").join(",")).toBe("c,a,b");
		expect(wiki.filterTiddlers("a b c +[putlast:-2[]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("a b c +[putlast:-4[]]").join(",")).toBe("a,b,c");
	});

	it("should handle the remove operator", function() {
		expect(wiki.filterTiddlers("a b c +[remove[d e]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[remove[a]]").join(",")).toBe("b,c");
		expect(wiki.filterTiddlers("a b c +[remove[c b a]]").join(",")).toBe("");
	});

	it("should handle the replace operator", function() {
		expect(wiki.filterTiddlers("a b c dd +[replace[a]]").join(",")).toBe("dd,b,c");
		expect(wiki.filterTiddlers("a b c dd ee +[replace:2[a]]").join(",")).toBe("dd,ee,b,c");
		expect(wiki.filterTiddlers("a b c dd ee +[replace:5[c]]").join(",")).toBe("a,b,a,b,c,dd,ee");
		
		// strange things happen.
		expect(wiki.filterTiddlers("a b c dd ee +[replace:-1[c]]").join(",")).toBe("a,b,b,c,dd,ee");
		expect(wiki.filterTiddlers("a b c dd ee +[replace:-2[c]]").join(",")).toBe("a,b,c,dd,ee");
		expect(wiki.filterTiddlers("a b c dd ee +[replace:-2[ee]]").join(",")).toBe("a,b,c,dd,c,dd,ee");
	});

	it("should handle the sortby operator", function() {
		expect(wiki.filterTiddlers("a b c +[sortby[d e]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("a b c +[sortby[b c a]]").join(",")).toBe("b,c,a");
		expect(wiki.filterTiddlers("aa a b c +[sortby[b c a cc]]").join(",")).toBe("aa,b,c,a");
		expect(wiki.filterTiddlers("a bb b c +[sortby[b c a cc]]").join(",")).toBe("bb,b,c,a");
		expect(wiki.filterTiddlers("a bb cc b c +[sortby[b c a cc]]").join(",")).toBe("bb,b,c,a,cc");

		expect(wiki.filterTiddlers("b a b c +[sortby[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("b a b c +[sortby[a b b c]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("b a b c +[sortby[b a c b]]").join(",")).toBe("b,a,c");
	});

	it("should handle the sortan operator", function() {
		expect(wiki.filterTiddlers("b a c +[sortan[]]").join(",")).toBe("a,b,c");
		expect(wiki.filterTiddlers("b2 a3 a1 b1 c2 a2 c3 b3 c1 +[sortan[]]").join(",")).toBe("a1,a2,a3,b1,b2,b3,c1,c2,c3");
		expect(wiki.filterTiddlers("b2 a10 c10 a1 b1 c2 a2 b10 c1 +[sortan[]]").join(",")).toBe("a1,a2,a10,b1,b2,b10,c1,c2,c10");
		expect(wiki.filterTiddlers("TiddlerOne $:/TiddlerTwo [[Tiddler Three]] +[sortan[]]").join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne");
	});

	it("should handle the sortan operator sorting on date fields", function() {
		expect(wiki.filterTiddlers("TiddlerOne $:/TiddlerTwo [[Tiddler Three]] +[sortan[modified]]").join(",")).toBe("$:/TiddlerTwo,TiddlerOne,Tiddler Three");
	});

	it("should handle the slugify operator", function() {
		expect(wiki.filterTiddlers("[[Joe Bloggs]slugify[]]").join(",")).toBe("joe-bloggs");
		expect(wiki.filterTiddlers("[[Joe Bloggs2]slugify[]]").join(",")).toBe("joe-bloggs2");
		expect(wiki.filterTiddlers("[[@£$%^&*((]slugify[]]").join(",")).toBe("64-163-36-37-94-38-42-40-40");
		expect(wiki.filterTiddlers("One one ONE O!N!E +[slugify[]]").join(",")).toBe("one,one,one,one");
		expect(wiki.filterTiddlers("TiddlerOne $:/TiddlerTwo +[slugify[]]").join(",")).toBe("tiddler-one,tiddler-two");
	});

	it("should handle the sortsub operator", function() {
		var widget = require("$:/core/modules/widgets/widget.js");
		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
										   { wiki:wiki, document:$tw.document});
		rootWidget.makeChildWidgets();
		var anchorWidget = rootWidget.children[0];
		rootWidget.setVariable("sort1","[length[]]");
		rootWidget.setVariable("sort2","[get[text]else[]length[]]");
		rootWidget.setVariable("sort3","[{!!value}divide{!!cost}]");
		expect(wiki.filterTiddlers("[sortsub:number<sort1>]",anchorWidget).join(",")).toBe("one,hasList,TiddlerOne,has filter,$:/TiddlerTwo,Tiddler Three,$:/ShadowPlugin,a fourth tiddler,filter regexp test");
		expect(wiki.filterTiddlers("[!sortsub:number<sort1>]",anchorWidget).join(",")).toBe("filter regexp test,a fourth tiddler,$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,TiddlerOne,has filter,hasList,one");
		expect(wiki.filterTiddlers("[sortsub:string<sort1>]",anchorWidget).join(",")).toBe("TiddlerOne,has filter,$:/TiddlerTwo,Tiddler Three,$:/ShadowPlugin,a fourth tiddler,filter regexp test,one,hasList");
		expect(wiki.filterTiddlers("[!sortsub:string<sort1>]",anchorWidget).join(",")).toBe("hasList,one,filter regexp test,a fourth tiddler,$:/ShadowPlugin,$:/TiddlerTwo,Tiddler Three,TiddlerOne,has filter");
		expect(wiki.filterTiddlers("[sortsub:number<sort2>]",anchorWidget).join(",")).toBe("one,TiddlerOne,hasList,has filter,a fourth tiddler,Tiddler Three,$:/TiddlerTwo,filter regexp test,$:/ShadowPlugin");
		expect(wiki.filterTiddlers("[!sortsub:number<sort2>]",anchorWidget).join(",")).toBe("$:/ShadowPlugin,filter regexp test,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,has filter,hasList,TiddlerOne,one");
		expect(wiki.filterTiddlers("[sortsub:string<sort2>]",anchorWidget).join(",")).toBe("one,TiddlerOne,hasList,has filter,$:/ShadowPlugin,a fourth tiddler,Tiddler Three,$:/TiddlerTwo,filter regexp test");
		expect(wiki.filterTiddlers("[!sortsub:string<sort2>]",anchorWidget).join(",")).toBe("filter regexp test,$:/TiddlerTwo,Tiddler Three,a fourth tiddler,$:/ShadowPlugin,has filter,hasList,TiddlerOne,one");
		expect(wiki.filterTiddlers("[[TiddlerOne]] [[$:/TiddlerTwo]] [[Tiddler Three]] [[a fourth tiddler]] +[!sortsub:number<sort3>]",anchorWidget).join(",")).toBe("$:/TiddlerTwo,Tiddler Three,TiddlerOne,a fourth tiddler");
	});
	
	it("should handle the toggle operator", function() {
		expect(wiki.filterTiddlers("[[Tiddler Three]tags[]] +[toggle[one]]").join(",")).toBe("two");
		expect(wiki.filterTiddlers("[[Tiddler Three]tags[]] -[[one]] +[toggle[one]]").join(",")).toBe("two,one");
		expect(wiki.filterTiddlers("[[Tiddler Three]tags[]] +[toggle[three],[four]]").join(",")).toBe("one,two,three");
		expect(wiki.filterTiddlers("[[Tiddler Three]tags[]] [[three]] +[toggle[three],[four]]").join(",")).toBe("one,two,four");
		expect(wiki.filterTiddlers("[[Tiddler Three]tags[]] [[three]] [[four]] +[toggle[three],[five]]").join(",")).toBe("one,two,five,four");
	});

	it("should handle multiple operands for search-replace", function() {
		var widget = require("$:/core/modules/widgets/widget.js");
		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
										   { wiki:wiki, document:$tw.document});
		rootWidget.makeChildWidgets();
		var anchorWidget = rootWidget.children[0];
		rootWidget.setVariable("var1","different");
		rootWidget.setVariable("myregexp","e|o");
		rootWidget.setVariable("name","(\w+)\s(\w+)");
		expect(wiki.filterTiddlers("[[Welcome to TiddlyWiki, a unique non-linear webpage.]search-replace[webpage],[notebook]]").join(",")).toBe("Welcome to TiddlyWiki, a unique non-linear notebook.");
		expect(wiki.filterTiddlers("[[Welcome to TiddlyWiki, a unique non-linear notebook.]search-replace[unique],<var1>]",anchorWidget).join(",")).toBe("Welcome to TiddlyWiki, a different non-linear notebook.");
		expect(wiki.filterTiddlers("[[Welcome to TiddlyWiki, a unique non-linear notebook.]search-replace[TiddlyWiki],{one}]",anchorWidget).join(",")).toBe("Welcome to This is the text of tiddler [[one]], a unique non-linear notebook.");
		expect(wiki.filterTiddlers("[[Hello There]search-replace:g:regexp<myregexp>,[]]",anchorWidget).join(",")).toBe("Hll Thr");
		expect(wiki.filterTiddlers("[[Hello There]search-replace::regexp<myregexp>,[]]",anchorWidget).join(",")).toBe("Hllo There");
		expect(wiki.filterTiddlers("[[Hello There]search-replace:gi[H],[]]",anchorWidget).join(",")).toBe("ello Tere");	
	});
	
	it("should handle the pad operator", function() {
	expect(wiki.filterTiddlers("[[2]pad[]]").join(",")).toBe("2");
	expect(wiki.filterTiddlers("[[2]pad[0]]").join(",")).toBe("2");
	expect(wiki.filterTiddlers("[[2]pad[1]]").join(",")).toBe("2");
	expect(wiki.filterTiddlers("2 20 +[pad[3]]").join(",")).toBe("002,020");
	expect(wiki.filterTiddlers("[[2]pad[9]]").join(",")).toBe("000000002");
	expect(wiki.filterTiddlers("[[2]pad[9],[a]]").join(",")).toBe("aaaaaaaa2");
	expect(wiki.filterTiddlers("[[12]pad[9],[abc]]").join(",")).toBe("abcabca12");
	expect(wiki.filterTiddlers("[[12]pad:suffix[9],[abc]]").join(",")).toBe("12abcabca");
	});
}

});

})();