Test runner

test-runner.js

const testRunner = {
    tests: [],

    test(description, fn) {
        this.tests.push({
            description,
            fn
        });
    },

    run() {
        return new Promise((resolve, reject) => {
            for (let test of this.tests) {
                try {
                    test.fn();
                    test.ok = true;
                } catch (error) {
                    test.ok = false;
                    test.error = error;
                }
            }

            resolve(this.tests);

            this.tests = [];
        });
    }
};