directus

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import type { Relation } from '@directus/types';
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import { expect, test } from 'vitest';
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import { getRelationType } from './get-relation-type.js';
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test('Returns null if no relation object is included', () => {
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	const result = getRelationType({ relation: null, collection: null, field: 'test' });
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	expect(result).toBe(null);
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});
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test('Returns a2o if relation matches and includes one_collection_field and one_allowed_collection', () => {
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	const relation = {
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		collection: 'pages',
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		field: 'item',
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		related_collection: null,
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		meta: {
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			one_collection_field: 'collection',
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			one_allowed_collections: ['paragraphs', 'headings', 'images'],
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		},
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	} as Relation;
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	const result = getRelationType({
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		relation,
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		collection: 'pages',
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		field: 'item',
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	});
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	expect(result).toBe('a2o');
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});
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test('Returns m2o', () => {
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	const relation = {
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		collection: 'articles',
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		field: 'author',
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		related_collection: 'authors',
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	} as Relation;
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	const result = getRelationType({
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		relation,
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		collection: 'articles',
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		field: 'author',
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	});
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	expect(result).toBe('m2o');
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});
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test('Returns o2m', () => {
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	const relation = {
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		collection: 'articles',
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		field: 'author',
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		related_collection: 'authors',
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		meta: {
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			one_field: 'articles',
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		},
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	} as Relation;
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	const result = getRelationType({
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		relation,
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		collection: 'authors',
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		field: 'articles',
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	});
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	expect(result).toBe('o2m');
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});
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test('Returns null when field/collection does not match the relationship', () => {
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	const relation = {
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		collection: 'articles',
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		field: 'author',
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		related_collection: 'authors',
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		meta: {
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			one_field: 'articles',
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		},
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	} as Relation;
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	const result = getRelationType({
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		relation,
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		collection: 'unrelated',
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		field: 'wrong',
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	});
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	expect(result).toBe(null);
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});
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