Benjamin Gudehus hastebrot

What is a Workflow?

In digital commerce you typically have many systems involved in your operations. For example, you may have an ERP system that holds product master data and accounting reports, a CMS system for content, a CRM system for managing customer campaigns, a payment service to process credit cards, and so on. Sometimes you may even have custom built applications that need to participate in the commerce stack. One of the biggest challenges when operating a stack like this is ensuring consistency in the data spread across systems.

From SQL to Neo4j: Northwind

SQL Model

Neo4j Model

Get the SQL Dump

The SQL dump was stolen from here and imported into MySQL.

	import { cleanup, render, waitFor } from "@testing-library/react";
	import { userEvent } from "@testing-library/user-event";
	import { ColumnDataType, Compilable, Kysely } from "kysely";
	import { action, observable } from "mobx";
	import { observer } from "mobx-react-lite";
	import { useEffect, useState } from "react";
	import { beforeEach, expect, describe as suite, test } from "vitest";
	import { z } from "zod/v4";
	import { throwError } from "../../src/helpers/error";
	import { createDatabaseWithSqlocal } from "../../src/helpers/sqlocal";

	type NonEmptyArray<T> = [T, ...T[]];

	const okay: NonEmptyArray<number> = [1, 2];
	const alsoOkay: NonEmptyArray<number> = [1];
	const err: NonEmptyArray<number> = []; // error!

	import { z } from "zod/v4";
	const Foo = z.string().array().nonempty();
	type Foo = z.infer<typeof Foo>;
	const NonEmpty = z.tuple([z.string()], z.string());

	// ❯ bun add -d [email protected] vitest zod
	// ❯ bun run test --watch signia.test.tsx

	import { atom, computed, type Atom, type Computed, type Signal } from "signia";
	import { expect, test } from "vitest";
	import { z } from "zod";

	// repo for "signia" package: https://github.com/tldraw/signia

	test("signia condition with atom() and computed()", () => {

	// ❯ bun add -d signia vitest zod
	// ❯ bun run test --watch graph.test.ts

	import { atom, computed, type Atom, type Computed, type Signal } from "signia";
	import { expect, test } from "vitest";
	import { z } from "zod";

	test("signal graph", () => {
	const BlockProps = z.object({
	field1Input: zodAtom<number>(),

	@font-face {
	font-family: 'JetBrains Mono';
	font-style: normal;
	font-weight: 100;
	src: local("JetBrains Mono Thin"), local("JetBrainsMono-Thin"), url("../fonts/webfonts/JetBrainsMono-Thin.woff2") format("woff2");
	font-display: swap; }

	@font-face {
	font-family: 'JetBrains Mono';
	font-style: italic;

	#!/usr/bin/env -S deno run --no-check --allow-env --allow-read --allow-write --allow-net isogit.ts

	import fs from "https://deno.land/[email protected]/node/fs.ts";
	import path from "https://deno.land/[email protected]/node/path.ts";
	import git from "https://esm.sh/[email protected]";
	import http from "https://esm.sh/[email protected]/http/node.js";

	const repositoryDir = path.join(Deno.cwd(), "/../test-repository");
	const repositoryUrl = "https://github.com/isomorphic-git/lightning-fs";
	await git.clone({

	// https://stackoverflow.com/questions/7487917/convert-byte-array-to-escaped-string
	fun encodeToEscapedString(bytes: ByteArray): String {
	// 0x00..0x1f = non-printing characters
	// 0x20 = SPACE
	// 0x21..0x7e = printing characters
	// 0x7f = DELETE
	val string = StringBuilder()
	val intSize = 0xff
	val byteRange = 0x20..0x7e
	for (byte in bytes) {

	text = """Text attributes _italic_, bold, `monospace`. Some implementations may use single-asterisks for italic text."""

	expected = """<p>Text attributes <em>italic</em>, <strong>bold</strong>, <code>monospace</code>. Some implementations may use <i>single-asterisks</i> for italic text.</p>"""

	def lookup(text, start, size):
	return text[start:start+size]

	token_italic = "_"
	token_italic_alt = "*"
	token_strong = "**"