feat(frontend): scaffold SvelteKit with TS 7.0 (native-preview) and tsgo

frontend/node_modules/devalue/src/utils.test.js

@@ -0,0 +1,63 @@
+import * as assert from 'uvu/assert';
+import { suite } from 'uvu';
+import { valid_array_indices } from './utils.js';
+
+const test = suite('valid_array_indices');
+
+test('returns all indices for a normal dense array', () => {
+	const arr = ['a', 'b', 'c'];
+	assert.equal(valid_array_indices(arr), ['0', '1', '2']);
+});
+
+test('returns empty array for an empty array', () => {
+	assert.equal(valid_array_indices([]), []);
+});
+
+test('returns populated indices for a sparse array', () => {
+	const arr = [, 'b', ,];
+	assert.equal(valid_array_indices(arr), ['1']);
+});
+
+test('strips non-numeric properties from a dense array', () => {
+	const arr = ['a', 'b'];
+	arr.foo = 'x';
+	arr.bar = 42;
+	assert.equal(valid_array_indices(arr), ['0', '1']);
+});
+
+test('strips non-numeric properties from a very sparse array', () => {
+	const arr = [];
+	arr[1_000_000] = 'x';
+	arr.foo = 'should be ignored';
+	assert.equal(valid_array_indices(arr), ['1000000']);
+});
+
+test('returns empty array when only non-numeric properties exist', () => {
+	const arr = [];
+	arr.foo = 'x';
+	arr.bar = 42;
+	assert.equal(valid_array_indices(arr), []);
+});
+
+test('handles multiple non-numeric properties after indices', () => {
+	const arr = [1, 2, 3];
+	arr.a = 'x';
+	arr.b = 'y';
+	arr.c = 'z';
+	assert.equal(valid_array_indices(arr), ['0', '1', '2']);
+});
+
+test('handles a single-element array with non-numeric property', () => {
+	const arr = ['only'];
+	arr.extra = true;
+	assert.equal(valid_array_indices(arr), ['0']);
+});
+
+test('handles array properties pretending to be indices', () => {
+	const arr = ['a', 'b'];
+	arr[-1] = 'negative index';
+	arr[2 ** 32 - 1] = 'too large index';
+	assert.equal(valid_array_indices(arr), ['0', '1']);
+});
+
+test.run();