Find memory leak in node example.

memory_leak.spec.tsx

/**
 * @author: Leonid Vinikov <[email protected]>
 */
import { Component } from "@internal/core/component";
import * as assert from "assert";

describe( 'Core', () => {
    describe( 'Component', () => {
        test( 'render() :: should have no memory leaks', async function () {
            // Arrange.
            class TestComponent extends Component {
                static getName() {
                    return "TestComponent";
                }

                template() {
                    return <div>Test Component</div>;
                }
            }

            const component = new TestComponent( document.createElement( 'div' ) );

            for ( let i = 0; i < 200; i++ ) {
                component.render();
            }

            const initialMemory = process.memoryUsage();

            for ( let i = 0; i < 100; i++ ) {
                component.render();
            }

            // Act - Promise with a timeout to allow the garbage collector to run.
            await new Promise( resolve => setTimeout( resolve, 0 ) );

            const currentMemory = process.memoryUsage();

            // Assert.
            assert.ok(
                initialMemory.heapUsed >= currentMemory.heapUsed
            );
        } );
    } )
} );