feat: Add fork of json-schema-to-zod (no-changelog) (#11228)

packages/@n8n/json-schema-to-zod/test/parsers/parse-schema.test.ts

@@ -0,0 +1,113 @@
+import { z } from 'zod';
+
+import { parseSchema } from '../../src/parsers/parse-schema';
+
+describe('parseSchema', () => {
+	test('should be usable without providing refs', () => {
+		expect(parseSchema({ type: 'string' })).toMatchZod(z.string());
+	});
+
+	test('should return a seen and processed ref', () => {
+		const seen = new Map();
+		const schema = {
+			type: 'object',
+			properties: {
+				prop: {
+					type: 'string',
+				},
+			},
+		};
+		expect(parseSchema(schema, { seen, path: [] }));
+		expect(parseSchema(schema, { seen, path: [] }));
+	});
+
+	test('should be possible to describe a readonly schema', () => {
+		expect(parseSchema({ type: 'string', readOnly: true })).toMatchZod(z.string().readonly());
+	});
+
+	test('should handle nullable', () => {
+		expect(
+			parseSchema(
+				{
+					type: 'string',
+					nullable: true,
+				},
+				{ path: [], seen: new Map() },
+			),
+		).toMatchZod(z.string().nullable());
+	});
+
+	test('should handle enum', () => {
+		expect(parseSchema({ enum: ['someValue', 57] })).toMatchZod(
+			z.union([z.literal('someValue'), z.literal(57)]),
+		);
+	});
+
+	test('should handle multiple type', () => {
+		expect(parseSchema({ type: ['string', 'number'] })).toMatchZod(
+			z.union([z.string(), z.number()]),
+		);
+	});
+
+	test('should handle if-then-else type', () => {
+		expect(
+			parseSchema({
+				if: { type: 'string' },
+				then: { type: 'number' },
+				else: { type: 'boolean' },
+			}),
+		).toMatchZod(
+			z.union([z.number(), z.boolean()]).superRefine((value, ctx) => {
+				const result = z.string().safeParse(value).success
+					? z.number().safeParse(value)
+					: z.boolean().safeParse(value);
+				if (!result.success) {
+					result.error.errors.forEach((error) => ctx.addIssue(error));
+				}
+			}),
+		);
+	});
+
+	test('should handle anyOf', () => {
+		expect(
+			parseSchema({
+				anyOf: [
+					{
+						type: 'string',
+					},
+					{ type: 'number' },
+				],
+			}),
+		).toMatchZod(z.union([z.string(), z.number()]));
+	});
+
+	test('should handle oneOf', () => {
+		expect(
+			parseSchema({
+				oneOf: [
+					{
+						type: 'string',
+					},
+					{ type: 'number' },
+				],
+			}),
+		).toMatchZod(
+			z.any().superRefine((x, ctx) => {
+				const schemas = [z.string(), z.number()];
+				const errors = schemas.reduce<z.ZodError[]>(
+					(errors, schema) =>
+						((result) => (result.error ? [...errors, result.error] : errors))(schema.safeParse(x)),
+					[],
+				);
+				if (schemas.length - errors.length !== 1) {
+					ctx.addIssue({
+						path: ctx.path,
+						code: 'invalid_union',
+						unionErrors: errors,
+						message: 'Invalid input: Should pass single schema',
+					});
+				}
+			}),
+		);
+	});
+});