Yehuda Katz
5f664dd78b
The idea is that the environment wraps up the mutable stuff in Handlebars (like the helpers) and that you could theoretically create a new one at any time and pass it in to Handlebars.template. Every test makes a new environment and uses it in template compilation.
534 lines
21 KiB
JavaScript
534 lines
21 KiB
JavaScript
/*global CompilerContext, shouldCompileTo, shouldCompileToWithPartials */
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describe('helpers', function() {
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it("helper with complex lookup$", function() {
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var string = "{{#goodbyes}}{{{link ../prefix}}}{{/goodbyes}}";
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var hash = {prefix: "/root", goodbyes: [{text: "Goodbye", url: "goodbye"}]};
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var helpers = {link: function(prefix) {
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return "<a href='" + prefix + "/" + this.url + "'>" + this.text + "</a>";
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}};
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shouldCompileTo(string, [hash, helpers], "<a href='/root/goodbye'>Goodbye</a>");
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});
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it("helper block with complex lookup expression", function() {
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var string = "{{#goodbyes}}{{../name}}{{/goodbyes}}";
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var hash = {name: "Alan"};
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var helpers = {goodbyes: function(options) {
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var out = "";
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var byes = ["Goodbye", "goodbye", "GOODBYE"];
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for (var i = 0,j = byes.length; i < j; i++) {
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out += byes[i] + " " + options.fn(this) + "! ";
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}
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return out;
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}};
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shouldCompileTo(string, [hash, helpers], "Goodbye Alan! goodbye Alan! GOODBYE Alan! ");
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});
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it("helper with complex lookup and nested template", function() {
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var string = "{{#goodbyes}}{{#link ../prefix}}{{text}}{{/link}}{{/goodbyes}}";
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var hash = {prefix: '/root', goodbyes: [{text: "Goodbye", url: "goodbye"}]};
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var helpers = {link: function (prefix, options) {
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return "<a href='" + prefix + "/" + this.url + "'>" + options.fn(this) + "</a>";
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}};
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shouldCompileToWithPartials(string, [hash, helpers], false, "<a href='/root/goodbye'>Goodbye</a>");
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});
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it("helper with complex lookup and nested template in VM+Compiler", function() {
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var string = "{{#goodbyes}}{{#link ../prefix}}{{text}}{{/link}}{{/goodbyes}}";
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var hash = {prefix: '/root', goodbyes: [{text: "Goodbye", url: "goodbye"}]};
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var helpers = {link: function (prefix, options) {
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return "<a href='" + prefix + "/" + this.url + "'>" + options.fn(this) + "</a>";
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}};
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shouldCompileToWithPartials(string, [hash, helpers], true, "<a href='/root/goodbye'>Goodbye</a>");
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});
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it("block helper", function() {
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var string = "{{#goodbyes}}{{text}}! {{/goodbyes}}cruel {{world}}!";
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var template = CompilerContext.compile(string);
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var result = template({world: "world"}, { helpers: {goodbyes: function(options) { return options.fn({text: "GOODBYE"}); }}});
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equal(result, "GOODBYE! cruel world!", "Block helper executed");
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});
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it("block helper staying in the same context", function() {
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var string = "{{#form}}<p>{{name}}</p>{{/form}}";
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var template = CompilerContext.compile(string);
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var result = template({name: "Yehuda"}, {helpers: {form: function(options) { return "<form>" + options.fn(this) + "</form>"; } }});
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equal(result, "<form><p>Yehuda</p></form>", "Block helper executed with current context");
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});
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it("block helper should have context in this", function() {
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var source = "<ul>{{#people}}<li>{{#link}}{{name}}{{/link}}</li>{{/people}}</ul>";
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var link = function(options) {
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return '<a href="/people/' + this.id + '">' + options.fn(this) + '</a>';
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};
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var data = { "people": [
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{ "name": "Alan", "id": 1 },
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{ "name": "Yehuda", "id": 2 }
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]};
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shouldCompileTo(source, [data, {link: link}], "<ul><li><a href=\"/people/1\">Alan</a></li><li><a href=\"/people/2\">Yehuda</a></li></ul>");
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});
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it("block helper for undefined value", function() {
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shouldCompileTo("{{#empty}}shouldn't render{{/empty}}", {}, "");
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});
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it("block helper passing a new context", function() {
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var string = "{{#form yehuda}}<p>{{name}}</p>{{/form}}";
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var template = CompilerContext.compile(string);
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var result = template({yehuda: {name: "Yehuda"}}, { helpers: {form: function(context, options) { return "<form>" + options.fn(context) + "</form>"; }}});
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equal(result, "<form><p>Yehuda</p></form>", "Context variable resolved");
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});
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it("block helper passing a complex path context", function() {
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var string = "{{#form yehuda/cat}}<p>{{name}}</p>{{/form}}";
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var template = CompilerContext.compile(string);
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var result = template({yehuda: {name: "Yehuda", cat: {name: "Harold"}}}, { helpers: {form: function(context, options) { return "<form>" + options.fn(context) + "</form>"; }}});
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equal(result, "<form><p>Harold</p></form>", "Complex path variable resolved");
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});
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it("nested block helpers", function() {
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var string = "{{#form yehuda}}<p>{{name}}</p>{{#link}}Hello{{/link}}{{/form}}";
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var template = CompilerContext.compile(string);
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var result = template({
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yehuda: {name: "Yehuda" }
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}, {
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helpers: {
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link: function(options) { return "<a href='" + this.name + "'>" + options.fn(this) + "</a>"; },
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form: function(context, options) { return "<form>" + options.fn(context) + "</form>"; }
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}
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});
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equal(result, "<form><p>Yehuda</p><a href='Yehuda'>Hello</a></form>", "Both blocks executed");
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});
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it("block helper inverted sections", function() {
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var string = "{{#list people}}{{name}}{{^}}<em>Nobody's here</em>{{/list}}";
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var list = function(context, options) {
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if (context.length > 0) {
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var out = "<ul>";
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for(var i = 0,j=context.length; i < j; i++) {
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out += "<li>";
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out += options.fn(context[i]);
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out += "</li>";
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}
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out += "</ul>";
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return out;
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} else {
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return "<p>" + options.inverse(this) + "</p>";
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}
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};
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var hash = {people: [{name: "Alan"}, {name: "Yehuda"}]};
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var empty = {people: []};
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var rootMessage = {
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people: [],
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message: "Nobody's here"
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};
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var messageString = "{{#list people}}Hello{{^}}{{message}}{{/list}}";
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// the meaning here may be kind of hard to catch, but list.not is always called,
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// so we should see the output of both
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shouldCompileTo(string, [hash, { list: list }], "<ul><li>Alan</li><li>Yehuda</li></ul>", "an inverse wrapper is passed in as a new context");
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shouldCompileTo(string, [empty, { list: list }], "<p><em>Nobody's here</em></p>", "an inverse wrapper can be optionally called");
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shouldCompileTo(messageString, [rootMessage, { list: list }], "<p>Nobody's here</p>", "the context of an inverse is the parent of the block");
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});
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describe("helpers hash", function() {
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it("providing a helpers hash", function() {
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shouldCompileTo("Goodbye {{cruel}} {{world}}!", [{cruel: "cruel"}, {world: function() { return "world"; }}], "Goodbye cruel world!",
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"helpers hash is available");
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shouldCompileTo("Goodbye {{#iter}}{{cruel}} {{world}}{{/iter}}!", [{iter: [{cruel: "cruel"}]}, {world: function() { return "world"; }}],
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"Goodbye cruel world!", "helpers hash is available inside other blocks");
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});
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it("in cases of conflict, helpers win", function() {
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shouldCompileTo("{{{lookup}}}", [{lookup: 'Explicit'}, {lookup: function() { return 'helpers'; }}], "helpers",
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"helpers hash has precedence escaped expansion");
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shouldCompileTo("{{lookup}}", [{lookup: 'Explicit'}, {lookup: function() { return 'helpers'; }}], "helpers",
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"helpers hash has precedence simple expansion");
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});
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it("the helpers hash is available is nested contexts", function() {
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shouldCompileTo("{{#outer}}{{#inner}}{{helper}}{{/inner}}{{/outer}}",
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[{'outer': {'inner': {'unused':[]}}}, {'helper': function() { return 'helper'; }}], "helper",
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"helpers hash is available in nested contexts.");
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});
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it("the helper hash should augment the global hash", function() {
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Handlebars.registerHelper('test_helper', function() { return 'found it!'; });
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shouldCompileTo(
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"{{test_helper}} {{#if cruel}}Goodbye {{cruel}} {{world}}!{{/if}}", [
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{cruel: "cruel"},
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{world: function() { return "world!"; }}
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],
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"found it! Goodbye cruel world!!");
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});
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});
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it("Multiple global helper registration", function() {
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var helpers = Handlebars.helpers;
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try {
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Handlebars.helpers = {};
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Handlebars.registerHelper({
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'if': helpers['if'],
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world: function() { return "world!"; },
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test_helper: function() { return 'found it!'; }
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});
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shouldCompileTo(
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"{{test_helper}} {{#if cruel}}Goodbye {{cruel}} {{world}}!{{/if}}",
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[{cruel: "cruel"}],
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"found it! Goodbye cruel world!!");
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} finally {
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if (helpers) {
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Handlebars.helpers = helpers;
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}
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}
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});
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it("negative number literals work", function() {
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var string = 'Message: {{hello -12}}';
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var hash = {};
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var helpers = {hello: function(times) {
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if(typeof times !== 'number') { times = "NaN"; }
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return "Hello " + times + " times";
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}};
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shouldCompileTo(string, [hash, helpers], "Message: Hello -12 times", "template with a negative integer literal");
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});
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describe("String literal parameters", function() {
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it("simple literals work", function() {
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var string = 'Message: {{hello "world" 12 true false}}';
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var hash = {};
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var helpers = {hello: function(param, times, bool1, bool2) {
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if(typeof times !== 'number') { times = "NaN"; }
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if(typeof bool1 !== 'boolean') { bool1 = "NaB"; }
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if(typeof bool2 !== 'boolean') { bool2 = "NaB"; }
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return "Hello " + param + " " + times + " times: " + bool1 + " " + bool2;
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}};
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shouldCompileTo(string, [hash, helpers], "Message: Hello world 12 times: true false", "template with a simple String literal");
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});
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it("using a quote in the middle of a parameter raises an error", function() {
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(function() {
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var string = 'Message: {{hello wo"rld"}}';
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CompilerContext.compile(string);
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}).should.throw(Error);
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});
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it("escaping a String is possible", function(){
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var string = 'Message: {{{hello "\\"world\\""}}}';
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var hash = {};
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var helpers = {hello: function(param) { return "Hello " + param; }};
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shouldCompileTo(string, [hash, helpers], "Message: Hello \"world\"", "template with an escaped String literal");
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});
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it("it works with ' marks", function() {
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var string = 'Message: {{{hello "Alan\'s world"}}}';
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var hash = {};
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var helpers = {hello: function(param) { return "Hello " + param; }};
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shouldCompileTo(string, [hash, helpers], "Message: Hello Alan's world", "template with a ' mark");
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});
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});
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it("negative number literals work", function() {
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var string = 'Message: {{hello -12}}';
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var hash = {};
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var helpers = {hello: function(times) {
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if(typeof times !== 'number') { times = "NaN"; }
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return "Hello " + times + " times";
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}};
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shouldCompileTo(string, [hash, helpers], "Message: Hello -12 times", "template with a negative integer literal");
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});
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describe("multiple parameters", function() {
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it("simple multi-params work", function() {
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var string = 'Message: {{goodbye cruel world}}';
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var hash = {cruel: "cruel", world: "world"};
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var helpers = {goodbye: function(cruel, world) { return "Goodbye " + cruel + " " + world; }};
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shouldCompileTo(string, [hash, helpers], "Message: Goodbye cruel world", "regular helpers with multiple params");
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});
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it("block multi-params work", function() {
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var string = 'Message: {{#goodbye cruel world}}{{greeting}} {{adj}} {{noun}}{{/goodbye}}';
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var hash = {cruel: "cruel", world: "world"};
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var helpers = {goodbye: function(cruel, world, options) {
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return options.fn({greeting: "Goodbye", adj: cruel, noun: world});
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}};
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shouldCompileTo(string, [hash, helpers], "Message: Goodbye cruel world", "block helpers with multiple params");
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});
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});
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describe('hash', function() {
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it("helpers can take an optional hash", function() {
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var template = CompilerContext.compile('{{goodbye cruel="CRUEL" world="WORLD" times=12}}');
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var helpers = {
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goodbye: function(options) {
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return "GOODBYE " + options.hash.cruel + " " + options.hash.world + " " + options.hash.times + " TIMES";
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}
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};
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var context = {};
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var result = template(context, {helpers: helpers});
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equals(result, "GOODBYE CRUEL WORLD 12 TIMES", "Helper output hash");
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});
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it("helpers can take an optional hash with booleans", function() {
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var helpers = {
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goodbye: function(options) {
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if (options.hash.print === true) {
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return "GOODBYE " + options.hash.cruel + " " + options.hash.world;
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} else if (options.hash.print === false) {
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return "NOT PRINTING";
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} else {
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return "THIS SHOULD NOT HAPPEN";
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}
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}
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};
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var context = {};
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var template = CompilerContext.compile('{{goodbye cruel="CRUEL" world="WORLD" print=true}}');
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var result = template(context, {helpers: helpers});
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equals(result, "GOODBYE CRUEL WORLD", "Helper output hash");
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template = CompilerContext.compile('{{goodbye cruel="CRUEL" world="WORLD" print=false}}');
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result = template(context, {helpers: helpers});
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equals(result, "NOT PRINTING", "Boolean helper parameter honored");
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});
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it("block helpers can take an optional hash", function() {
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var template = CompilerContext.compile('{{#goodbye cruel="CRUEL" times=12}}world{{/goodbye}}');
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var helpers = {
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goodbye: function(options) {
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return "GOODBYE " + options.hash.cruel + " " + options.fn(this) + " " + options.hash.times + " TIMES";
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}
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};
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var result = template({}, {helpers: helpers});
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equals(result, "GOODBYE CRUEL world 12 TIMES", "Hash parameters output");
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});
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it("block helpers can take an optional hash with single quoted stings", function() {
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var template = CompilerContext.compile("{{#goodbye cruel='CRUEL' times=12}}world{{/goodbye}}");
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var helpers = {
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goodbye: function(options) {
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return "GOODBYE " + options.hash.cruel + " " + options.fn(this) + " " + options.hash.times + " TIMES";
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}
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};
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var result = template({}, {helpers: helpers});
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equals(result, "GOODBYE CRUEL world 12 TIMES", "Hash parameters output");
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});
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it("block helpers can take an optional hash with booleans", function() {
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var helpers = {
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goodbye: function(options) {
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if (options.hash.print === true) {
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return "GOODBYE " + options.hash.cruel + " " + options.fn(this);
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} else if (options.hash.print === false) {
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return "NOT PRINTING";
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} else {
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return "THIS SHOULD NOT HAPPEN";
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}
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}
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};
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var template = CompilerContext.compile('{{#goodbye cruel="CRUEL" print=true}}world{{/goodbye}}');
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var result = template({}, {helpers: helpers});
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equals(result, "GOODBYE CRUEL world", "Boolean hash parameter honored");
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template = CompilerContext.compile('{{#goodbye cruel="CRUEL" print=false}}world{{/goodbye}}');
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result = template({}, {helpers: helpers});
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equals(result, "NOT PRINTING", "Boolean hash parameter honored");
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});
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});
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describe("helperMissing", function() {
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it("if a context is not found, helperMissing is used", function() {
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(function() {
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var template = CompilerContext.compile("{{hello}} {{link_to world}}");
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template({});
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}).should.throw(/Missing helper: 'link_to'/);
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});
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it("if a context is not found, custom helperMissing is used", function() {
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var string = "{{hello}} {{link_to world}}";
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var context = { hello: "Hello", world: "world" };
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var helpers = {
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helperMissing: function(helper, context) {
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if(helper === "link_to") {
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return new Handlebars.SafeString("<a>" + context + "</a>");
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}
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}
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};
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shouldCompileTo(string, [context, helpers], "Hello <a>world</a>");
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});
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});
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describe("knownHelpers", function() {
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it("Known helper should render helper", function() {
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var template = CompilerContext.compile("{{hello}}", {knownHelpers: {"hello" : true}});
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var result = template({}, {helpers: {hello: function() { return "foo"; }}});
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equal(result, "foo", "'foo' should === '" + result);
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});
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it("Unknown helper in knownHelpers only mode should be passed as undefined", function() {
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var template = CompilerContext.compile("{{typeof hello}}", {knownHelpers: {'typeof': true}, knownHelpersOnly: true});
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var result = template({}, {helpers: {'typeof': function(arg) { return typeof arg; }, hello: function() { return "foo"; }}});
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equal(result, "undefined", "'undefined' should === '" + result);
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});
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it("Builtin helpers available in knownHelpers only mode", function() {
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var template = CompilerContext.compile("{{#unless foo}}bar{{/unless}}", {knownHelpersOnly: true});
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var result = template({});
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equal(result, "bar", "'bar' should === '" + result);
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});
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it("Field lookup works in knownHelpers only mode", function() {
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var template = CompilerContext.compile("{{foo}}", {knownHelpersOnly: true});
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var result = template({foo: 'bar'});
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equal(result, "bar", "'bar' should === '" + result);
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});
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it("Conditional blocks work in knownHelpers only mode", function() {
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var template = CompilerContext.compile("{{#foo}}bar{{/foo}}", {knownHelpersOnly: true});
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var result = template({foo: 'baz'});
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equal(result, "bar", "'bar' should === '" + result);
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});
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it("Invert blocks work in knownHelpers only mode", function() {
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var template = CompilerContext.compile("{{^foo}}bar{{/foo}}", {knownHelpersOnly: true});
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var result = template({foo: false});
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equal(result, "bar", "'bar' should === '" + result);
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});
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it("Functions are bound to the context in knownHelpers only mode", function() {
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var template = CompilerContext.compile("{{foo}}", {knownHelpersOnly: true});
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var result = template({foo: function() { return this.bar; }, bar: 'bar'});
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equal(result, "bar", "'bar' should === '" + result);
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});
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it("Unknown helper call in knownHelpers only mode should throw", function() {
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(function() {
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CompilerContext.compile("{{typeof hello}}", {knownHelpersOnly: true});
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}).should.throw(Error);
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});
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});
|
|
|
|
describe("blockHelperMissing", function() {
|
|
it("lambdas are resolved by blockHelperMissing, not handlebars proper", function() {
|
|
var string = "{{#truthy}}yep{{/truthy}}";
|
|
var data = { truthy: function() { return true; } };
|
|
shouldCompileTo(string, data, "yep");
|
|
});
|
|
it("lambdas resolved by blockHelperMissing are bound to the context", function() {
|
|
var string = "{{#truthy}}yep{{/truthy}}";
|
|
var boundData = { truthy: function() { return this.truthiness(); }, truthiness: function() { return false; } };
|
|
shouldCompileTo(string, boundData, "");
|
|
});
|
|
});
|
|
|
|
describe('name conflicts', function() {
|
|
it("helpers take precedence over same-named context properties", function() {
|
|
var template = CompilerContext.compile("{{goodbye}} {{cruel world}}");
|
|
|
|
var helpers = {
|
|
goodbye: function() {
|
|
return this.goodbye.toUpperCase();
|
|
},
|
|
|
|
cruel: function(world) {
|
|
return "cruel " + world.toUpperCase();
|
|
}
|
|
};
|
|
|
|
var context = {
|
|
goodbye: "goodbye",
|
|
world: "world"
|
|
};
|
|
|
|
var result = template(context, {helpers: helpers});
|
|
equals(result, "GOODBYE cruel WORLD", "Helper executed");
|
|
});
|
|
|
|
it("helpers take precedence over same-named context properties$", function() {
|
|
var template = CompilerContext.compile("{{#goodbye}} {{cruel world}}{{/goodbye}}");
|
|
|
|
var helpers = {
|
|
goodbye: function(options) {
|
|
return this.goodbye.toUpperCase() + options.fn(this);
|
|
},
|
|
|
|
cruel: function(world) {
|
|
return "cruel " + world.toUpperCase();
|
|
}
|
|
};
|
|
|
|
var context = {
|
|
goodbye: "goodbye",
|
|
world: "world"
|
|
};
|
|
|
|
var result = template(context, {helpers: helpers});
|
|
equals(result, "GOODBYE cruel WORLD", "Helper executed");
|
|
});
|
|
|
|
it("Scoped names take precedence over helpers", function() {
|
|
var template = CompilerContext.compile("{{this.goodbye}} {{cruel world}} {{cruel this.goodbye}}");
|
|
|
|
var helpers = {
|
|
goodbye: function() {
|
|
return this.goodbye.toUpperCase();
|
|
},
|
|
|
|
cruel: function(world) {
|
|
return "cruel " + world.toUpperCase();
|
|
},
|
|
};
|
|
|
|
var context = {
|
|
goodbye: "goodbye",
|
|
world: "world"
|
|
};
|
|
|
|
var result = template(context, {helpers: helpers});
|
|
equals(result, "goodbye cruel WORLD cruel GOODBYE", "Helper not executed");
|
|
});
|
|
|
|
it("Scoped names take precedence over block helpers", function() {
|
|
var template = CompilerContext.compile("{{#goodbye}} {{cruel world}}{{/goodbye}} {{this.goodbye}}");
|
|
|
|
var helpers = {
|
|
goodbye: function(options) {
|
|
return this.goodbye.toUpperCase() + options.fn(this);
|
|
},
|
|
|
|
cruel: function(world) {
|
|
return "cruel " + world.toUpperCase();
|
|
},
|
|
};
|
|
|
|
var context = {
|
|
goodbye: "goodbye",
|
|
world: "world"
|
|
};
|
|
|
|
var result = template(context, {helpers: helpers});
|
|
equals(result, "GOODBYE cruel WORLD goodbye", "Helper executed");
|
|
});
|
|
});
|
|
});
|