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// Asserting APIs: // - generated by Traceur (based on type annotations) // - can be also used in tests for instance assert.type(something, Type); assert.returnType(returnValue, Type); assert.argumentTypes(firstArg, Type, secondArg, Type);
// this can be used anywhere in the code // (useful inside test, when we don't wanna define an interface) assert(value).is(...)
// Custom type assert: // - i have a custom type // - adding an assert methos assert.define(MyUser, function(value) { assert(value).is(Type, Type2); // or assert(value, 'name').is(assert.string); assert(value, 'contact').is(assert.structure({ email: assert.string, cell: assert.string })); assert(value, 'contacts').is(assert.arrayOf(assert.structure({email: assert.string}))); });
// Define interface (an empty type with assert method) // - returns an empty class with assert method var Email = assert.define('IEmail', function(value) { assert(value).is(String);
if (value.indexOf('@') !== -1) { assert.fail('has to contain "@"'); } });
// Predefined types assert.string assert.number assert.boolean assert.arrayOf(...types) assert.structure(object)