@hazae41/phobos/dist/esm/mods/runner/context/context.mjs

Modern and minimalist testing library for the web

import { TestError } from '../error.mjs';

class Context {
    message;
    _befores = new Array();
    _afters = new Array();
    _catcher;
    constructor(message) {
        this.message = message;
        this.test = this.test.bind(this);
        this.before = this.before.bind(this);
        this.after = this.after.bind(this);
        this.catcher = this.catcher.bind(this);
        this.wait = this.wait.bind(this);
    }
    /**
     * Run something before each test block
     * @param closure closure
     */
    before(closure) {
        this._befores.push(closure);
    }
    /**
     * Run something after each test block
     * @param closure closure
     */
    after(closure) {
        this._afters.push(closure);
    }
    /**
     * Run something when an error is thrown
     * @param closure
     */
    catcher(closure) {
        this._catcher = closure;
    }
    _tests = new Array();
    /**
     * Run a test block
     * @param message message to show
     * @param closure closure to run
     * @returns result of closure
     */
    async test(message, closure) {
        const promise = this._test(message, closure);
        this._tests.push(promise);
        return promise.catch(() => { });
    }
    async _test(message, closure) {
        const context = new Context(message);
        for (const before of this._befores)
            await before(context);
        try {
            await closure(context);
            await context.wait();
        }
        catch (cause) {
            const error = new TestError(message, { cause });
            if (!this._catcher)
                throw error;
            try {
                await this._catcher?.(error, context);
            }
            catch (cause) {
                throw new TestError(message, { cause });
            }
        }
        finally {
            for (const after of this._afters)
                await after(context);
        }
    }
    /**
     * Wait for all tests to finish (called by default at the end of each test block)
     * @why You want to forcefully wait in the midst of a test block
     */
    async wait() {
        try {
            await Promise.all(this._tests);
        }
        finally {
            this._tests = new Array();
        }
    }
}

export { Context };
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