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describe('data', function() {
it('passing in data to a compiled function that expects data - works with helpers', function() {
var template = CompilerContext.compile('{{hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.data.adjective + ' ' + this.noun;
}
};
var result = template({noun: 'cat'}, {helpers: helpers, data: {adjective: 'happy'}});
equals('happy cat', result, 'Data output by helper');
});
it('data can be looked up via @foo', function() {
var template = CompilerContext.compile('{{@hello}}');
var result = template({}, { data: { hello: 'hello' } });
equals('hello', result, '@foo retrieves template data');
});
it('deep @foo triggers automatic top-level data', function() {
var template = CompilerContext.compile('{{#let world="world"}}{{#if foo}}{{#if foo}}Hello {{@world}}{{/if}}{{/if}}{{/let}}');
var helpers = Handlebars.createFrame(handlebarsEnv.helpers);
helpers.let = function(options) {
var frame = Handlebars.createFrame(options.data);
for (var prop in options.hash) {
if (prop in options.hash) {
frame[prop] = options.hash[prop];
}
}
return options.fn(this, { data: frame });
};
var result = template({ foo: true }, { helpers: helpers });
equals('Hello world', result, 'Automatic data was triggered');
});
it('parameter data can be looked up via @foo', function() {
var template = CompilerContext.compile('{{hello @world}}');
var helpers = {
hello: function(noun) {
return 'Hello ' + noun;
}
};
var result = template({}, { helpers: helpers, data: { world: 'world' } });
equals('Hello world', result, '@foo as a parameter retrieves template data');
});
it('hash values can be looked up via @foo', function() {
var template = CompilerContext.compile('{{hello noun=@world}}');
var helpers = {
hello: function(options) {
return 'Hello ' + options.hash.noun;
}
};
var result = template({}, { helpers: helpers, data: { world: 'world' } });
equals('Hello world', result, '@foo as a parameter retrieves template data');
});
it('nested parameter data can be looked up via @foo.bar', function() {
var template = CompilerContext.compile('{{hello @world.bar}}');
var helpers = {
hello: function(noun) {
return 'Hello ' + noun;
}
};
var result = template({}, { helpers: helpers, data: { world: {bar: 'world' } } });
equals('Hello world', result, '@foo as a parameter retrieves template data');
});
it('nested parameter data does not fail with @world.bar', function() {
var template = CompilerContext.compile('{{hello @world.bar}}');
var helpers = {
hello: function(noun) {
return 'Hello ' + noun;
}
};
var result = template({}, { helpers: helpers, data: { foo: {bar: 'world' } } });
equals('Hello undefined', result, '@foo as a parameter retrieves template data');
});
it('parameter data throws when using complex scope references', function() {
var string = '{{#goodbyes}}{{text}} cruel {{@foo/../name}}! {{/goodbyes}}';
shouldThrow(function() {
CompilerContext.compile(string);
}, Error);
});
it('data can be functions', function() {
var template = CompilerContext.compile('{{@hello}}');
var result = template({}, { data: { hello: function() { return 'hello'; } } });
equals('hello', result);
});
it('data can be functions with params', function() {
var template = CompilerContext.compile('{{@hello "hello"}}');
var result = template({}, { data: { hello: function(arg) { return arg; } } });
equals('hello', result);
});
it('data is inherited downstream', function() {
var template = CompilerContext.compile('{{#let foo=1 bar=2}}{{#let foo=bar.baz}}{{@bar}}{{@foo}}{{/let}}{{@foo}}{{/let}}', { data: true });
var helpers = {
let: function(options) {
var frame = Handlebars.createFrame(options.data);
for (var prop in options.hash) {
if (prop in options.hash) {
frame[prop] = options.hash[prop];
}
}
return options.fn(this, {data: frame});
}
};
var result = template({ bar: { baz: 'hello world' } }, { helpers: helpers, data: {} });
equals('2hello world1', result, 'data variables are inherited downstream');
});
it('passing in data to a compiled function that expects data - works with helpers in partials', function() {
var template = CompilerContext.compile('{{>myPartial}}', {data: true});
var partials = {
myPartial: CompilerContext.compile('{{hello}}', {data: true})
};
var helpers = {
hello: function(options) {
return options.data.adjective + ' ' + this.noun;
}
};
var result = template({noun: 'cat'}, {helpers: helpers, partials: partials, data: {adjective: 'happy'}});
equals('happy cat', result, 'Data output by helper inside partial');
});
it('passing in data to a compiled function that expects data - works with helpers and parameters', function() {
var template = CompilerContext.compile('{{hello world}}', {data: true});
var helpers = {
hello: function(noun, options) {
return options.data.adjective + ' ' + noun + (this.exclaim ? '!' : '');
}
};
var result = template({exclaim: true, world: 'world'}, {helpers: helpers, data: {adjective: 'happy'}});
equals('happy world!', result, 'Data output by helper');
});
it('passing in data to a compiled function that expects data - works with block helpers', function() {
var template = CompilerContext.compile('{{#hello}}{{world}}{{/hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.fn(this);
},
world: function(options) {
return options.data.adjective + ' world' + (this.exclaim ? '!' : '');
}
};
var result = template({exclaim: true}, {helpers: helpers, data: {adjective: 'happy'}});
equals('happy world!', result, 'Data output by helper');
});
it('passing in data to a compiled function that expects data - works with block helpers that use ..', function() {
var template = CompilerContext.compile('{{#hello}}{{world ../zomg}}{{/hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.fn({exclaim: '?'});
},
world: function(thing, options) {
return options.data.adjective + ' ' + thing + (this.exclaim || '');
}
};
var result = template({exclaim: true, zomg: 'world'}, {helpers: helpers, data: {adjective: 'happy'}});
equals('happy world?', result, 'Data output by helper');
});
it('passing in data to a compiled function that expects data - data is passed to with block helpers where children use ..', function() {
var template = CompilerContext.compile('{{#hello}}{{world ../zomg}}{{/hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.data.accessData + ' ' + options.fn({exclaim: '?'});
},
world: function(thing, options) {
return options.data.adjective + ' ' + thing + (this.exclaim || '');
}
};
var result = template({exclaim: true, zomg: 'world'}, {helpers: helpers, data: {adjective: 'happy', accessData: '#win'}});
equals('#win happy world?', result, 'Data output by helper');
});
it('you can override inherited data when invoking a helper', function() {
var template = CompilerContext.compile('{{#hello}}{{world zomg}}{{/hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.fn({exclaim: '?', zomg: 'world'}, { data: {adjective: 'sad'} });
},
world: function(thing, options) {
return options.data.adjective + ' ' + thing + (this.exclaim || '');
}
};
var result = template({exclaim: true, zomg: 'planet'}, {helpers: helpers, data: {adjective: 'happy'}});
equals('sad world?', result, 'Overriden data output by helper');
});
it('you can override inherited data when invoking a helper with depth', function() {
var template = CompilerContext.compile('{{#hello}}{{world ../zomg}}{{/hello}}', {data: true});
var helpers = {
hello: function(options) {
return options.fn({exclaim: '?'}, { data: {adjective: 'sad'} });
},
world: function(thing, options) {
return options.data.adjective + ' ' + thing + (this.exclaim || '');
}
};
var result = template({exclaim: true, zomg: 'world'}, {helpers: helpers, data: {adjective: 'happy'}});
equals('sad world?', result, 'Overriden data output by helper');
});
describe('@root', function() {
it('the root context can be looked up via @root', function() {
var template = CompilerContext.compile('{{@root.foo}}');
var result = template({foo: 'hello'}, { data: {} });
equals('hello', result);
result = template({foo: 'hello'}, {});
equals('hello', result);
});
it('passed root values take priority', function() {
var template = CompilerContext.compile('{{@root.foo}}');
var result = template({}, { data: {root: {foo: 'hello'} } });
equals('hello', result);
});
});
describe('nesting', function() {
it('the root context can be looked up via @root', function() {
var template = CompilerContext.compile('{{#helper}}{{#helper}}{{@./depth}} {{@../depth}} {{@../../depth}}{{/helper}}{{/helper}}');
var result = template({foo: 'hello'}, {
helpers: {
helper: function(options) {
var frame = Handlebars.createFrame(options.data);
frame.depth = options.data.depth + 1;
return options.fn(this, {data: frame});
}
},
data: {
depth: 0
}
});
equals('2 1 0', result);
});
});
});
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