n8n/packages/workflow/test/utils.test.ts

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import { jsonParse, deepCopy } from '../src/utils';
describe('jsonParse', () => {
it('parses JSON', () => {
expect(jsonParse('[1, 2, 3]')).toEqual([1, 2, 3]);
expect(jsonParse('{ "a": 1 }')).toEqual({ a: 1 });
});
it('optionally throws `errorMessage', () => {
expect(() => {
jsonParse('', { errorMessage: 'Invalid JSON' });
}).toThrow('Invalid JSON');
});
it('optionally returns a `fallbackValue`', () => {
expect(jsonParse('', { fallbackValue: { foo: 'bar' } })).toEqual({ foo: 'bar' });
});
});
describe('deepCopy', () => {
it('should deep copy an object', () => {
const serializable = {
x: 1,
y: 2,
toJSON: () => 'x:1,y:2',
};
const object = {
deep: {
props: {
list: [{ a: 1 }, { b: 2 }, { c: 3 }],
},
arr: [1, 2, 3],
},
serializable,
arr: [
{
prop: {
list: ['a', 'b', 'c'],
},
},
],
func: () => {},
date: new Date(1667389172201),
undef: undefined,
nil: null,
bool: true,
num: 1,
};
const copy = deepCopy(object);
expect(copy).not.toBe(object);
expect(copy.arr).toEqual(object.arr);
expect(copy.arr).not.toBe(object.arr);
expect(copy.date).toBe('2022-11-02T11:39:32.201Z');
expect(copy.serializable).toBe(serializable.toJSON());
expect(copy.deep.props).toEqual(object.deep.props);
expect(copy.deep.props).not.toBe(object.deep.props);
});
it('should avoid max call stack in case of circular deps', () => {
const object: Record<string, any> = {
deep: {
props: {
list: [{ a: 1 }, { b: 2 }, { c: 3 }],
},
arr: [1, 2, 3],
},
arr: [
{
prop: {
list: ['a', 'b', 'c'],
},
},
],
func: () => {},
date: new Date(1667389172201),
undef: undefined,
nil: null,
bool: true,
num: 1,
};
object.circular = object;
object.deep.props.circular = object;
object.deep.arr.push(object);
const copy = deepCopy(object);
expect(copy).not.toBe(object);
expect(copy.arr).toEqual(object.arr);
expect(copy.arr).not.toBe(object.arr);
expect(copy.date).toBe('2022-11-02T11:39:32.201Z');
expect(copy.deep.props.circular).toBe(copy);
expect(copy.deep.props.circular).not.toBe(object);
expect(copy.deep.arr.slice(-1)[0]).toBe(copy);
expect(copy.deep.arr.slice(-1)[0]).not.toBe(object);
});
});