initial commit

backend/tests/filter.test.ts

@@ -0,0 +1,33 @@
+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+import { parseIdList, parseMatchMode, sqlForRelationFilter } from '../src/filter.ts';
+
+describe('filter helpers', () => {
+  it('parses comma separated ids and drops invalid values', () => {
+    assert.deepEqual(parseIdList('1, 2, x, -1, 3'), [1, 2, 3]);
+  });
+
+  it('defaults match mode to any', () => {
+    assert.equal(parseMatchMode('all'), 'all');
+    assert.equal(parseMatchMode('anything'), 'any');
+    assert.equal(parseMatchMode(undefined), 'any');
+  });
+
+  it('builds relation filters with bound array parameters', () => {
+    const params: unknown[] = [];
+    const sql = sqlForRelationFilter(
+      [1, 2],
+      'all',
+      'pokemon_skills',
+      'pokemon_id',
+      'skill_id',
+      'p.id',
+      params
+    );
+
+    assert.equal(params.length, 1);
+    assert.deepEqual(params[0], [1, 2]);
+    assert.match(sql, /count\(DISTINCT skill_id\)/);
+    assert.match(sql, /= 2/);
+  });
+});