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var nunjucks = require('nunjucks');
var Immutable = require('immutable');
var Promise = require('../../utils/promise');
describe('TemplateBlock', function() {
var TemplateBlock = require('../templateBlock');
describe('create', function() {
pit('must initialize a simple TemplateBlock from a function', function() {
var templateBlock = TemplateBlock.create('sayhello', function(block) {
return '<p>Hello, World!</p>';
});
// Check basic templateBlock properties
expect(templateBlock.getName()).toBe('sayhello');
expect(templateBlock.getPost()).toBeNull();
expect(templateBlock.getParse()).toBeTruthy();
expect(templateBlock.getEndTag()).toBe('endsayhello');
expect(templateBlock.getBlocks().size).toBe(0);
expect(templateBlock.getShortcuts().size).toBe(0);
expect(templateBlock.getExtensionName()).toBe('BlocksayhelloExtension');
// Check result of applying block
return Promise()
.then(function() {
return templateBlock.applyBlock();
})
.then(function(result) {
expect(result.name).toBe('sayhello');
expect(result.body).toBe('<p>Hello, World!</p>');
});
});
});
describe('toNunjucksExt()', function() {
pit('must create a valid nunjucks extension', function() {
var templateBlock = TemplateBlock.create('sayhello', function(block) {
return '<p>Hello, World!</p>';
});
// Create a fresh Nunjucks environment
var env = new nunjucks.Environment(null, { autoescape: false });
// Add template block to environement
var Ext = templateBlock.toNunjucksExt();
env.addExtension(templateBlock.getExtensionName(), new Ext());
// Render a template using the block
var src = '{% sayhello %}{% endsayhello %}';
return Promise.nfcall(env.renderString.bind(env), src)
.then(function(res) {
expect(res).toBe('<p>Hello, World!</p>');
});
});
pit('must apply block arguments correctly', function() {
var templateBlock = TemplateBlock.create('sayhello', function(block) {
return '<'+block.kwargs.tag+'>Hello, '+block.kwargs.name+'!</'+block.kwargs.tag+'>';
});
// Create a fresh Nunjucks environment
var env = new nunjucks.Environment(null, { autoescape: false });
// Add template block to environement
var Ext = templateBlock.toNunjucksExt();
env.addExtension(templateBlock.getExtensionName(), new Ext());
// Render a template using the block
var src = '{% sayhello name="Samy", tag="p" %}{% endsayhello %}';
return Promise.nfcall(env.renderString.bind(env), src)
.then(function(res) {
expect(res).toBe('<p>Hello, Samy!</p>');
});
});
pit('must accept an async function', function() {
var templateBlock = TemplateBlock.create('sayhello', function(block) {
return Promise()
.then(function() {
return 'Hello ' + block.body;
});
});
// Create a fresh Nunjucks environment
var env = new nunjucks.Environment(null, { autoescape: false });
// Add template block to environement
var Ext = templateBlock.toNunjucksExt();
env.addExtension(templateBlock.getExtensionName(), new Ext());
// Render a template using the block
var src = '{% sayhello %}Samy{% endsayhello %}';
return Promise.nfcall(env.renderString.bind(env), src)
.then(function(res) {
expect(res).toBe('Hello Samy');
});
});
pit('must handle nested blocks', function() {
var templateBlock = new TemplateBlock({
name: 'yoda',
blocks: Immutable.List(['start', 'end']),
process: function(block) {
var nested = {};
block.blocks.forEach(function(blk) {
nested[blk.name] = blk.body.trim();
});
return '<p class="yoda">'+nested.end+' '+nested.start+'</p>';
}
});
// Create a fresh Nunjucks environment
var env = new nunjucks.Environment(null, { autoescape: false });
// Add template block to environement
var Ext = templateBlock.toNunjucksExt();
env.addExtension(templateBlock.getExtensionName(), new Ext());
// Render a template using the block
var src = '{% yoda %}{% start %}this sentence should be{% end %}inverted{% endyoda %}';
return Promise.nfcall(env.renderString.bind(env), src)
.then(function(res) {
expect(res).toBe('<p class="yoda">inverted this sentence should be</p>');
});
});
});
});
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