mustache.js/test/unit.compiler.js

// the compiler tests are the exact same as the interpreter tests
// so instead of writing all the tests twice, override the to_html
// method
module('Compiler', {
	setup: function() {
		this._oldToHtml = Mustache.to_html;
		Mustache.to_html = function(template, view, partials) {
			var compiler = Mustache.compile(template, partials);
			return compiler(view);
		}
	},
	teardown: function() {
		Mustache.to_html = this._oldToHtml;
	}
});

test("Argument validation", function() {
	expect(4);
	
	equals(Mustache.to_html(undefined), '', 'No parameters');
	equals(Mustache.to_html('{{hi}}'), '', ' No View or Partials');
	equals(Mustache.to_html('{{hi}}', {hi:'Hi.'}), 'Hi.', 'No Partials');
	equals(Mustache.to_html('{{>hi}}', undefined, {hi:'{{p}}'}), '', 'Partial but no view');
});

test("Parser", function() {
	expect(4);

	// matches whitespace_partial.html
	equals(
		Mustache.to_html(
			'<h1>{{  greeting  }}</h1>\n{{> partial }}\n<h3>{{ farewell }}</h3>',
			{
				greeting: function() {
					return "Welcome";
				},

				farewell: function() {
					return "Fair enough, right?";
				},

				partial: {
					name: "Chris",
					value: 10000,
					taxed_value: function() {
						return this.value - (this.value * 0.4);
					},
					in_ca: true
				}
			},
			{partial:'Hello {{ name}}\nYou have just won ${{value }}!\n{{# in_ca  }}\nWell, ${{ taxed_value }}, after taxes.\n{{/  in_ca }}\n'}
		),
		'<h1>Welcome</h1>\nHello Chris\nYou have just won $10000!\n\nWell, $6000, after taxes.\n\n\n<h3>Fair enough, right?</h3>',
		'Whitespace in Tag names'
	);
	
	equals(
		Mustache.to_html(
			'{{tag1}}\n\n\n{{tag2}}\n',
			{ tag1: 'Hello', tag2: 'World' },
			{}
		),
		'Hello\n\n\nWorld\n',
		'Preservation of white space'
	);
	
	try {
		Mustache.to_html(
			'{{=tag1}}',
			{ tag1: 'Hello' },
			{}
		);

		ok(false);
	} catch (e) {
		equals(e.message, 'Unexpected end of document.');
	}
	
	var partials = { 'partial' : '{{key}}' };
	Mustache.compile('{{>partial}}', partials );
	
	equals(partials['partial'], '{{key}}', 'Partials compiler must be non-destructive');
});

test("Basic Variables", function() {
	expect(3);
	
	// matches escaped.html
	equals(
		Mustache.to_html(
			'<h1>{{title}}</h1>\nBut not {{entities}}.\n',
			{
				title: function() {
					return "Bear > Shark";
				},
				entities: "&quot;"
			},
			{}
		),
		'<h1>Bear &gt; Shark</h1>\nBut not &amp;quot;.\n',
		'HTML Escaping'
	);
	
	// matches null_string.html
	equals(
		Mustache.to_html(
			'Hello {{name}}\nglytch {{glytch}}\nbinary {{binary}}\nvalue {{value}}\nnumeric {{numeric}}',
			{
				name: "Elise",
				glytch: true,
				binary: false,
				value: null,
				numeric: function() {
					return NaN;
				}
			},
			{}
		),
		'Hello Elise\nglytch true\nbinary false\nvalue \nnumeric NaN',
		'Different variable types'
	);
	
	// matches two_in_a_row.html
	equals(
		Mustache.to_html(
			'{{greeting}}, {{name}}!',
			{
				name: "Joe",
				greeting: "Welcome"
			},
			{}
		),
		'Welcome, Joe!'
	);
	
});

test("'{' or '&' (Unescaped Variable)", function() {
	expect(2);
	
	// matches unescaped.html
	equals(
		Mustache.to_html(
			'<h1>{{{title}}}</h1>',
			{
				title: function() {
					return "Bear > Shark";
				}
			},
			{}
		),
		'<h1>Bear > Shark</h1>',
		'{ character'
	);
	
	equals(
		Mustache.to_html(
			'<h1>{{&title}}</h1>',
			{
				title: function() {
					return "Bear > Shark";
				}
			},
			{}
		),
		'<h1>Bear > Shark</h1>',
		'& character'
	);
});

test("'#' (Sections)", function() {
	expect(7);
	
	// matches array_of_partials_implicit_partial.html
	equals(
		Mustache.to_html(
			'Here is some stuff!\n{{#numbers}}\n{{>partial}}\n{{/numbers}}',
			{ numbers: ['1', '2', '3', '4'] },
			{ partial: '{{.}}' }
		),
		'Here is some stuff!\n\n1\n\n2\n\n3\n\n4\n',
		'Array of Partials (Implicit)'
	);
	
	// matches array_of_partials_partial.html
	equals(
		Mustache.to_html(
			'Here is some stuff!\n{{#numbers}}\n{{>partial}}\n{{/numbers}}',
			{ numbers: [{i: '1'}, {i: '2'}, {i: '3'}, {i: '4'}] },
			{ partial: '{{i}}' }
		),
		'Here is some stuff!\n\n1\n\n2\n\n3\n\n4\n',
		'Array of Partials (Explicit)'
	);
	
	// matches array_of_strings.html
	equals(
		Mustache.to_html(
			'{{#array_of_strings}}{{.}} {{/array_of_strings}}',
			{array_of_strings: ['hello', 'world']},
			{}
		),
		'hello world ',
		'Array of Strings'
	);
	
	// mathces higher_order_sections.html
	equals(
		Mustache.to_html(
			'{{#bolder}}Hi {{name}}.{{/bolder}}\n',
			{
				"name": "Tater",
				"helper": "To tinker?",
				"bolder": function() {
					return function(text, render) {
						return "<b>" + render(text) + '</b> ' + this.helper;
					}
				}
			},
			{}
		),
		'<b>Hi Tater.</b> To tinker?\n'
	);
	
	// matches recursion_with_same_names.html
	equals(
		Mustache.to_html(
			'{{ name }}\n{{ description }}\n\n{{#terms}}\n  {{name}}\n  {{index}}\n{{/terms}}\n',
			{
				name: 'name',
				description: 'desc',
				terms: [
					{name: 't1', index: 0},
					{name: 't2', index: 1}
				]
			},
			{}
		),
		'name\ndesc\n\n\n  t1\n  0\n\n  t2\n  1\n\n'
	);
	
	// matches reuse_of_enumerables.html
	equals(
		Mustache.to_html(
			'{{#terms}}\n  {{name}}\n  {{index}}\n{{/terms}}\n{{#terms}}\n  {{name}}\n  {{index}}\n{{/terms}}\n',
			{
				terms: [
					{name: 't1', index: 0},
					{name: 't2', index: 1}
				]
			},
			{}
		),
		'\n  t1\n  0\n\n  t2\n  1\n\n\n  t1\n  0\n\n  t2\n  1\n\n',
		'Lazy match of Section and Inverted Section'
	);
	
	// matches section_as_context.html
	equals(
		Mustache.to_html(
			'{{#a_object}}\n  <h1>{{title}}</h1>\n  <p>{{description}}</p>\n  <ul>\n    {{#a_list}}\n    <li>{{label}}</li>\n    {{/a_list}}\n  </ul>\n{{/a_object}}\n',
			{
				a_object: {
					title: 'this is an object',
					description: 'one of its attributes is a list',
					a_list: [{label: 'listitem1'}, {label: 'listitem2'}]
				}
			},
			{}
		),
		'\n  <h1>this is an object</h1>\n  <p>one of its attributes is a list</p>\n  <ul>\n    \n    <li>listitem1</li>\n    \n    <li>listitem2</li>\n    \n  </ul>\n\n',
		'Lazy match of Section and Inverted Section'
	);
});

test("'^' (Inverted Section)", function() {
	expect(1);
	
	// matches inverted_section.html
	equals(
		Mustache.to_html(
			'{{#repo}}<b>{{name}}</b>{{/repo}}\n{{^repo}}No repos :({{/repo}}\n',
			{
				"repo": []
			},
			{}
		),
		'\nNo repos :(\n'
	);
});

test("'>' (Partials)", function() {
	expect(5);
	
	// matches view_partial.html
	equals(
		Mustache.to_html(
			'<h1>{{greeting}}</h1>\n{{>partial}}\n<h3>{{farewell}}</h3>',
			{
				greeting: function() {
					return "Welcome";
				},
				
				farewell: function() {
					return "Fair enough, right?";
				},
				
				partial: {
					name: "Chris",
					value: 10000,
					taxed_value: function() {
						return this.value - (this.value * 0.4);
					},
					in_ca: true
				}
			},
			{partial: 'Hello {{name}}\nYou have just won ${{value}}!\n{{#in_ca}}\nWell, ${{ taxed_value }}, after taxes.\n{{/in_ca}}\n'}
		),
		'<h1>Welcome</h1>\nHello Chris\nYou have just won $10000!\n\nWell, $6000, after taxes.\n\n\n<h3>Fair enough, right?</h3>'
	);
	
	// matches array_partial.html
	equals(
		Mustache.to_html(
			'{{>partial}}',
			{ 
				partial: {
					array: ['1', '2', '3', '4']
				}
			},
			{ partial: 'Here\'s a non-sense array of values\n{{#array}}\n  {{.}}\n{{/array}}' }
		),
		'Here\'s a non-sense array of values\n\n  1\n\n  2\n\n  3\n\n  4\n'
	);
	
	// matches template_partial.html
	equals(
		Mustache.to_html(
			'<h1>{{title}}</h1>\n{{>partial}}',
			{
				title: function() {
					return "Welcome";
				},
				partial: {
					again: "Goodbye"
				}
			},
			{partial:'Again, {{again}}!'}
		),
		'<h1>Welcome</h1>\nAgain, Goodbye!'
	);
	
	// matches partial_recursion.html
	equals(
		Mustache.to_html(
			'{{name}}\n{{#kids}}\n{{>partial}}\n{{/kids}}',
			{
				name: '1',
				kids: [
					{
						name: '1.1',
						children: [
							{name: '1.1.1'}
						]
					}
				]
			},
			{partial:'{{name}}\n{{#children}}\n{{>partial}}\n{{/children}}'}
		),
		'1\n\n1.1\n\n1.1.1\n\n\n'
	);
	
	try {
		Mustache.to_html(
			'{{>partial}}',
			{},
			{partal: ''}
		);
		ok(false);
	} catch(e) {
		equals(e.message, "Unknown partial 'partial'");
	}
});

test("'=' (Set Delimiter)", function() {
	expect(1);
	
	// matches delimiter.html
	equals(
		Mustache.to_html(
			'{{=<% %>=}}*\n<% first %>\n* <% second %>\n<%=| |=%>\n* | third |\n|={{ }}=|\n* {{ fourth }}',
			{
				first: "It worked the first time.",
				second: "And it worked the second time.",
				third: "Then, surprisingly, it worked the third time.",
				fourth: "Fourth time also fine!."
			},
			{}
		),
		'*\nIt worked the first time.\n* And it worked the second time.\n\n* Then, surprisingly, it worked the third time.\n\n* Fourth time also fine!.',
		'Simple Set Delimiter'
	);
});

test("'!' (Comments)", function() {
	expect(4);
	
	equals(
		Mustache.to_html('{{! this is a single line comment !}}'),
		'',
		'Single Line Comments');

	equals(
		Mustache.to_html('{{!this is a multiline comment\ni said this is a multiline comment!}}'),
		'',
		'Multiline Comments');
			
	equals(
		Mustache.to_html('{{!this {{is}} {{#a}} {{/multiline}} comment\ni {{^said}} ! hello !! bye!}}'),
		'',
		'Correct tokenization');

	// matches comments.html
	equals(
		Mustache.to_html(
			'<h1>{{title}}{{! just something interesting... or not... !}}</h1>\n',
			{
				title: function() {
					return "A Comedy of Errors";
				}
			},
			{}
		),
		'<h1>A Comedy of Errors</h1>\n'
	);
});

test("'%' (Pragmas)", function() {
	expect(3);
	
	// matches array_of_strings_options.html
	equals(
		Mustache.to_html(
			'{{%IMPLICIT-ITERATOR iterator=rob}}\n{{#array_of_strings_options}}{{rob}} {{/array_of_strings_options}}',
			{array_of_strings_options: ['hello', 'world']},
			{}
		),
		'\nhello world ',
		'IMPLICIT-ITERATOR pragma'
	);
	
	// matches unknown_pragma.txt
	try {
		equals(
			Mustache.to_html(
				'{{%I-HAVE-THE-GREATEST-MUSTACHE}}\n',
				{},
				{}
			),
			'hello world ',
			'IMPLICIT-ITERATOR pragma'
		);
		ok(false);
	} catch (e) {
		equals(e.message, 'This implementation of mustache doesn\'t understand the \'I-HAVE-THE-GREATEST-MUSTACHE\' pragma');
	}
	
	equals(
		Mustache.to_html(
			'{{%IMPLICIT-ITERATOR}}{{#dataSet}}{{.}}:{{/dataSet}}',
			{ dataSet: [ 'Object 1', 'Object 2', 'Object 3' ] },
			{}
		),
		"Object 1:Object 2:Object 3:"
	);
});

test("Empty", function() {
	expect(2);
	
	// matches empty_template.html
	equals(
		Mustache.to_html(
			'<html><head></head><body><h1>Test</h1></body></html>',
			{},
			{}
		),
		'<html><head></head><body><h1>Test</h1></body></html>',
		'Empty Template'
	);
	
	// matches empty_partial.html
	equals(
		Mustache.to_html(
			'hey {{foo}}\n{{>partial}}\n',
			{
				foo: 1
			},
			{partial: 'yo'}
		),
		'hey 1\nyo\n',
		'Empty Partial'
	);
});

test("Demo", function() {
	expect(2);
	
	// matches simple.html
	equals(
		Mustache.to_html(
			'Hello {{name}}\nYou have just won ${{value}}!\n{{#in_ca}}\nWell, ${{ taxed_value }}, after taxes.\n{{/in_ca}}',
			{
				name: "Chris",
				value: 10000,
				taxed_value: function() {
					return this.value - (this.value * 0.4);
				},
				in_ca: true
			},
			{}
		),
		'Hello Chris\nYou have just won $10000!\n\nWell, $6000, after taxes.\n',
		'A simple template'
	);
	
	// matches complex.html
	var template = [
		'<h1>{{header}}</h1>',
		'{{#list}}',
		'  <ul>',
		'  {{#item}}',
		'  {{#current}}',
		'      <li><strong>{{name}}</strong></li>',
		'  {{/current}}',
		'  {{#link}}',
		'      <li><a href="{{url}}">{{name}}</a></li>',
		'  {{/link}}',
		'  {{/item}}',
		'  </ul>',
		'{{/list}}',
		'{{#empty}}',
		'  <p>The list is empty.</p>',
		'{{/empty}}'
	].join('\n');
	
	var view = {
		header: function() {
			return "Colors";
		},
		item: [
			{name: "red", current: true, url: "#Red"},
			{name: "green", current: false, url: "#Green"},
			{name: "blue", current: false, url: "#Blue"}
		],
		link: function() {
			return this["current"] !== true;
		},
		list: function() {
			return this.item.length !== 0;
		},
		empty: function() {
			return this.item.length === 0;
		}
	};
	
	var expected_result = '<h1>Colors</h1>\n\n  <ul>\n  \n  \n      <li><strong>red</strong></li>\n  \n  \n      <li><a href=\"#Red\">red</a></li>\n  \n  \n  \n  \n      <li><a href=\"#Green\">green</a></li>\n  \n  \n  \n  \n      <li><a href=\"#Blue\">blue</a></li>\n  \n  \n  </ul>\n\n';
	
	equals(
		Mustache.to_html(
			template,
			view,
			{}
		),
		expected_result,
		'A complex template'
	);
});

test("Performance", function() {
	expect(1);
	
	var start, end;
	
	// This performance test is copied form skymustache 
	// (https://github.com/schuyler1d/handlebars.js/blob/sky_test/test/perf.js)
	// set up the templates
	var template = "This is the story of guys who work on a project\n" +
		"called {{project}}. Their names were {{#people}}{{firstName}} and {{/people}}\n" +
		"they both enjoyed working on {{project}}.\n\n" +
		"{{#people}}\n" +
		"{{>personPet}}\n" +
		"{{/people}}";
	var partials = {
	  personPet: "{{firstName}} {{lastName}} {{#pet}} owned a {{species}}. Its name was {{name}}.{{/pet}}{{^pet}}didn't own a pet.{{/pet}}"
	};
	var view = {
	  project: "Handlebars",
	  people: [
		{ firstName: "Yehuda", lastName: "Katz" },
		{ firstName: "Alan", lastName: "Johnson", pet: { species: "cat", name: "Luke" } }
	  ]
	}
	
	start = new Date();
	for (var j=0;j<1000;++j) {
		this._oldToHtml(template, view, partials);
	}
	end = new Date();
	
	var interpreter_time = end.getTime() - start.getTime();
	
	start = new Date();
	var compiler = Mustache.compile(template, partials);
	for (var k=0;k<1000;++k) {
		compiler(view);
	}
	end = new Date();
	
	var compiler_time = end.getTime() - start.getTime();
	
	ok(compiler_time<interpreter_time, 'Compiler is faster (' + compiler_time + ' vs ' + interpreter_time + ').');
});

test("Regression Suite", function() {
	expect(3);
	
	// matches bug_11_eating_whitespace.html
	equals(
		Mustache.to_html(
			'{{tag}} foo',
			{ tag: "yo" },
			{}
		),
		'yo foo',
		'Issue 11'
	);
	
	// matches delimiters_partial.html
	equals(
		Mustache.to_html(
			'{{#enumerate}}\n{{>partial}}\n{{/enumerate}}',
			{ enumerate: [ { text: 'A' }, { text: 'B' } ] },
			{ partial: '{{=[[ ]]=}}\n{{text}}\n[[={{ }}=]]' }
		),
		'\n\n{{text}}\n\n\n\n{{text}}\n\n',
		'Issue 44'
	);
	
	// matches bug_46_set_delimiter.html
	equals(
		Mustache.to_html(
			'{{=[[ ]]=}}[[#IsMustacheAwesome]]mustache is awesome![[/IsMustacheAwesome]]', 
			{IsMustacheAwesome: true}, 
			{}
		),
		'mustache is awesome!',
		'Issue 46'
	);
});