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describe('subexpressions', function() {
it('arg-less helper', function() {
var string = '{{foo (bar)}}!';
var context = {};
var helpers = {
foo: function(val) {
return val + val;
},
bar: function() {
return 'LOL';
}
};
shouldCompileTo(string, [context, helpers], 'LOLLOL!');
});
it('helper w args', function() {
var string = '{{blog (equal a b)}}';
var context = { bar: 'LOL' };
var helpers = {
blog: function(val) {
return 'val is ' + val;
},
equal: function(x, y) {
return x === y;
}
};
shouldCompileTo(string, [context, helpers], 'val is true');
});
it('mixed paths and helpers', function() {
var string = '{{blog baz.bat (equal a b) baz.bar}}';
var context = { bar: 'LOL', baz: {bat: 'foo!', bar: 'bar!'} };
var helpers = {
blog: function(val, that, theOther) {
return 'val is ' + val + ', ' + that + ' and ' + theOther;
},
equal: function(x, y) {
return x === y;
}
};
shouldCompileTo(string, [context, helpers], 'val is foo!, true and bar!');
});
it('supports much nesting', function() {
var string = '{{blog (equal (equal true true) true)}}';
var context = { bar: 'LOL' };
var helpers = {
blog: function(val) {
return 'val is ' + val;
},
equal: function(x, y) {
return x === y;
}
};
shouldCompileTo(string, [context, helpers], 'val is true');
});
it('GH-800 : Complex subexpressions', function() {
var context = {a: 'a', b: 'b', c: {c: 'c'}, d: 'd', e: {e: 'e'}};
var helpers = {
dash: function(a, b) {
return a + '-' + b;
},
concat: function(a, b) {
return a + b;
}
};
shouldCompileTo("{{dash 'abc' (concat a b)}}", [context, helpers], 'abc-ab');
shouldCompileTo('{{dash d (concat a b)}}', [context, helpers], 'd-ab');
shouldCompileTo('{{dash c.c (concat a b)}}', [context, helpers], 'c-ab');
shouldCompileTo('{{dash (concat a b) c.c}}', [context, helpers], 'ab-c');
shouldCompileTo('{{dash (concat a e.e) c.c}}', [context, helpers], 'ae-c');
});
it('provides each nested helper invocation its own options hash', function() {
var string = '{{equal (equal true true) true}}';
var lastOptions = null;
var helpers = {
equal: function(x, y, options) {
if (!options || options === lastOptions) {
throw new Error('options hash was reused');
}
lastOptions = options;
return x === y;
}
};
shouldCompileTo(string, [{}, helpers], 'true');
});
it('with hashes', function() {
var string = "{{blog (equal (equal true true) true fun='yes')}}";
var context = { bar: 'LOL' };
var helpers = {
blog: function(val) {
return 'val is ' + val;
},
equal: function(x, y) {
return x === y;
}
};
shouldCompileTo(string, [context, helpers], 'val is true');
});
it('as hashes', function() {
var string = "{{blog fun=(equal (blog fun=1) 'val is 1')}}";
var helpers = {
blog: function(options) {
return 'val is ' + options.hash.fun;
},
equal: function(x, y) {
return x === y;
}
};
shouldCompileTo(string, [{}, helpers], 'val is true');
});
it('multiple subexpressions in a hash', function() {
var string = '{{input aria-label=(t "Name") placeholder=(t "Example User")}}';
var helpers = {
input: function(options) {
var hash = options.hash;
var ariaLabel = Handlebars.Utils.escapeExpression(hash['aria-label']);
var placeholder = Handlebars.Utils.escapeExpression(hash.placeholder);
return new Handlebars.SafeString('<input aria-label="' + ariaLabel + '" placeholder="' + placeholder + '" />');
},
t: function(defaultString) {
return new Handlebars.SafeString(defaultString);
}
};
shouldCompileTo(string, [{}, helpers], '<input aria-label="Name" placeholder="Example User" />');
});
it('multiple subexpressions in a hash with context', function() {
var string = '{{input aria-label=(t item.field) placeholder=(t item.placeholder)}}';
var context = {
item: {
field: 'Name',
placeholder: 'Example User'
}
};
var helpers = {
input: function(options) {
var hash = options.hash;
var ariaLabel = Handlebars.Utils.escapeExpression(hash['aria-label']);
var placeholder = Handlebars.Utils.escapeExpression(hash.placeholder);
return new Handlebars.SafeString('<input aria-label="' + ariaLabel + '" placeholder="' + placeholder + '" />');
},
t: function(defaultString) {
return new Handlebars.SafeString(defaultString);
}
};
shouldCompileTo(string, [context, helpers], '<input aria-label="Name" placeholder="Example User" />');
});
it('subexpression functions on the context', function() {
var string = '{{foo (bar)}}!';
var context = {
bar: function() {
return 'LOL';
}
};
var helpers = {
foo: function(val) {
return val + val;
}
};
shouldCompileTo(string, [context, helpers], 'LOLLOL!');
});
it("subexpressions can't just be property lookups", function() {
var string = '{{foo (bar)}}!';
var context = {
bar: 'LOL'
};
var helpers = {
foo: function(val) {
return val + val;
}
};
shouldThrow(function() {
shouldCompileTo(string, [context, helpers], 'LOLLOL!');
});
});
});
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