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CADAM-master/shared/suggestions.test.ts

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+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+import {
+  countSuggestionWords,
+  limitSuggestionWords,
+  normalizeConversationSuggestions,
+} from './suggestions.ts';
+
+describe('suggestion word limits', () => {
+  it('counts whitespace-separated words', () => {
+    assert.equal(countSuggestionWords('  add   mounting holes  '), 3);
+    assert.equal(countSuggestionWords(''), 0);
+  });
+
+  it('treats punctuation and hyphenated terms as part of a word', () => {
+    assert.equal(countSuggestionWords('make snap-fit tabs'), 3);
+    assert.equal(countSuggestionWords('add ribs, fillets'), 3);
+  });
+
+  it('limits suggestions to three words', () => {
+    assert.equal(
+      limitSuggestionWords('make the brackets thicker'),
+      'make the brackets',
+    );
+  });
+
+  it('keeps valid suggestions before truncating fallback suggestions', () => {
+    assert.deepEqual(
+      normalizeConversationSuggestions([
+        'make the brackets much thicker',
+        'add fillets',
+        '  add screw holes  ',
+        'increase wall thickness',
+      ]),
+      ['add fillets', 'add screw holes'],
+    );
+  });
+
+  it('deduplicates accepted suggestions before filling slots', () => {
+    assert.deepEqual(
+      normalizeConversationSuggestions([
+        'add fillets',
+        'add fillets',
+        'add screw holes',
+        'increase wall thickness',
+      ]),
+      ['add fillets', 'add screw holes'],
+    );
+  });
+
+  it('truncates invalid suggestions only when needed to fill two slots', () => {
+    assert.deepEqual(
+      normalizeConversationSuggestions([
+        'add chamfers',
+        'make the handle much larger',
+        'add four mounting holes',
+      ]),
+      ['add chamfers', 'make the handle'],
+    );
+  });
+});