jsinterface
v1.0.0
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Implement duck-type interfaces in Node JS
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jsinterface
Define, enforce, and wrap duck-type interfaces to objects in Node JS
var jsInterface = require('jsinterface');
jsInterface.define({name: 'interface1', methods: ['method1'], properties: ['prop1']});
var module1 = {
method1: function() { },
method2: function() { },
prop1: 'test',
prop2: false
};
var module2 = {
method1: function() { },
prop2: false
};
// runs - no error
jsInterface.checkComplies(module1, 'interface1');
// returns true
console.log(jsInterface.complies(module1, 'interface1')); // true
// throws error
try {
jsInterface.checkComplies(module2, 'interface1');
} catch(err) {
console.log(err.name); // MissingPropertyError
}
// returns false
console.log(jsInterface.complies(module2, 'interface1')); // false
// only interface fields & properties will be available on if1Module1
var wrapped1 = jsInterface.wrap(module1, 'interface1');
console.log(typeof wrapped1.method1); // function
console.log(typeof wrapped1.method2); // undefined
// throws error
try {
var wrapped2 = jsInterface.wrap(module2, 'interface1');
} catch(err) {
console.log(err.name); // MissingPropertyError
}