should-type-adaptors

import should from 'should'; import { addTypeAdaptor } from 'should-type-adaptors'; // Define a custom class class MyCustomType { constructor(id, value) { this.customId = id; this.data = value; } // A method that might be important for comparison getFormattedData() { return `ID: ${this.customId}, Data: ${this.data}`; } } // Register a type adaptor for MyCustomType to define how 'should.js' should compare it // This adaptor tells should.js to use 'getFormattedData' for deep comparisons. addTypeAdaptor(MyCustomType, { valueOf: (instance) => instance.getFormattedData(), // You can also define custom 'eql' or 'inspect' methods here // eql: (a, b) => a.customId === b.customId && a.data === b.data, // inspect: (instance, level) => `MyCustomType { id: ${instance.customId}, data: '${instance.data}' }` }); const instance1 = new MyCustomType(1, 'hello'); const instance2 = new MyCustomType(1, 'hello'); const instance3 = new MyCustomType(2, 'world'); // Now should.js can compare custom types based on their adapted value should(instance1).eql(instance2); // This assertion will pass because valueOf makes them deeply equal should(instance1).not.eql(instance3); // This assertion will pass console.log('Assertions passed successfully!'); // Example of direct usage of convert (less common) // import { convert } from 'should-type-adaptors'; // const convertedValue = convert(instance1); // Will be 'ID: 1, Data: hello' // console.log(convertedValue);