Zod Fixture

import { z } from 'zod';
import { createFixture } from 'zod-fixture';

const personSchema = z.object({
	name: z.string(),
	birthday: z.date(),
	address: z.object({
		street: z.string(),
		city: z.string(),
		state: z.string(),
	}),
	pets: z.array(z.object({ name: z.string(), breed: z.string() })),
	totalVisits: z.number().int().positive(),
});

const person = createFixture(personSchema, { seed: 11 });

import { ZodNumber, ZodObject, z } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

const totalVisitsGenerator = Generator({
	schema: ZodNumber,
	filter: ({ context }) => context.path.at(-1) === 'totalVisits',
	/**
	 * The `context` provides a path to the current field
	 *
	 * {
	 *   totalVisits: ...,
	 *   nested: {
	 *     totalVisits: ...,
	 *   }
	 * }
	 *
	 * Would match twice with the following paths:
	 *   ['totalVisits']
	 *   ['nested', 'totalVisits']
	 */

	// returns a more realistic number of visits.
	output: ({ transform }) => transform.utils.random.int({ min: 0, max: 25 }),
});

const addressGenerator = Generator({
	schema: ZodObject,
	filter: ({ context }) => context.path.at(-1) === 'address',
	// returns a custom address object
	output: () => ({
		street: 'My Street',
		city: 'My City',
		state: 'My State',
	}),
});

const personSchema = z.object({
	name: z.string(),
	birthday: z.date(),
	address: z.object({
		street: z.string(),
		city: z.string(),
		state: z.string(),
	}),
	pets: z.array(z.object({ name: z.string(), breed: z.string() })),
	totalVisits: z.number().int().positive(),
});

const fixture = new Fixture({ seed: 38 }).extend([
	addressGenerator,
	totalVisitsGenerator,
]);
const person = fixture.fromSchema(personSchema);

import { z, ZodString } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

// this is a custom zod type
const pxSchema = z.custom<`${number}px`>((val) => {
	return /^\d+px$/.test(val as string);
});

const StringGenerator = Generator({
	schema: ZodString,
	output: () => 'John Doe',
});

const PixelGenerator = Generator({
	schema: pxSchema,
	output: () => '100px',
});

const developerSchema = z.object({
	name: z.string().max(10),
	resolution: z.object({
		height: pxSchema,
		width: pxSchema,
	}),
});

const fixture = new Fixture({ seed: 7 }).extend([
	PixelGenerator,
	StringGenerator,
]);
const developer = fixture.fromSchema(developerSchema);

import { z, ZodString } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

const EmailGenerator = Generator({
	schema: ZodString,
	filter: ({ transform, def }) =>
		transform.utils.checks(def.checks).has('email'),
	output: () => 'john.malkovich@gmail.com',
});

const StringGenerator = Generator({
	schema: ZodString,
	output: ({ transform, def }) => {
		let min = transform.utils.checks(def.checks).find('min')?.value;
		/**
		 *     kind: "min";
		 *     value: number;
		 *     message?: string | undefined; // a custom error message
		 */

		let max = transform.utils.checks(def.checks).find('max')?.value;
		/**
		 *     kind: "max";
		 *     value: number;
		 *     message?: string | undefined; // a custom error message
		 */

		const length = transform.utils.checks(def.checks).find('length');
		/**
		 *     kind: "length";
		 *     value: number;
		 *     message?: string | undefined; // a custom error message
		 */

		if (length) {
			min = length.value;
			max = length.value;
		}

		return transform.utils.random.string({ min, max });
	},
});

const personSchema = z.object({
	name: z.string().max(10),
	email: z.string().email(),
});

const fixture = new Fixture({ seed: 38 }).extend([
	EmailGenerator,
	StringGenerator,
]);
const person = fixture.fromSchema(personSchema);

import { z, ZodString } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

const NameGenerator = Generator({
	schema: ZodString,
	filter: ({ context }) => context.path.at(-1) === 'name',
	output: () => 'John Doe',
});

const personSchema = z.object({
	name: z.string(), // this matches ['name']
	email: z.string().email(),
	relatives: z
		.object({
			name: z.string(), // this will match as well ['relatives', 'name']
			email: z.string().email(),
		})
		.array(),
});

const fixture = new Fixture({ seed: 7 }).extend(NameGenerator);
const person = fixture.fromSchema(personSchema);

import { z } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

// Your custom type
const pxSchema = z.custom<`${number}px`>((val) => {
	return /^\d+px$/.test(val as string);
});

// Your custom generator
const PixelGenerator = Generator({
	schema: pxSchema,
	output: () => '100px',
});

// Example
const resolutionSchema = z.object({
	width: pxSchema,
	height: pxSchema,
});

const fixture = new Fixture().extend([PixelGenerator]);
const resolution = fixture.fromSchema(resolutionSchema);

import { z } from 'zod';
import { Fixture, Generator } from 'zod-fixture';

class ExampleClass {
	id: number;
	constructor() {
		this.id = ExampleClass.uuid++;
	}
	static uuid = 1;
}

// Schema from instanceof (remember, this is just a z.custom)
const exampleSchema = z.instanceof(ExampleClass);

// Your custom generator
const ExampleGenerator = Generator({
	schema: exampleSchema,
	output: () => new ExampleClass(),
});

// Example
const listSchema = z.object({
	examples: exampleSchema.array(),
});

const fixture = new Fixture().extend(ExampleGenerator);
const result = fixture.fromSchema(listSchema);