Improved typechecking for tests [skip ci]

Author: ankane

tests/utils.test.js

@@ -5,8 +5,7 @@ import { SparseVector } from 'pgvector';
 
 test('fromSql', () => {
   assert.deepEqual(pgvector.fromSql('[1,2,3]'), [1, 2, 3]);
-  // @ts-ignore
-  assert.deepEqual(pgvector.fromSql('{1:1,2:2,3:3}/3').toArray(), [1, 2, 3]);
+  assert.deepEqual(pgvector.fromSql('{1:1,2:2,3:3}/3'), new SparseVector([1, 2, 3]));
   assert.equal(pgvector.fromSql(null), null);
   assert.throws(() => pgvector.fromSql(''), {message: 'invalid text representation'});
 });