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frontend/tests/credentialWeight.test.ts

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+import { describe, expect, test } from 'vitest';
+import {
+  MAX_CREDENTIAL_WEIGHT,
+  parseCredentialWeightText,
+  readCredentialWeight,
+  validateCredentialWeightText,
+} from '../src/utils/credentialWeight';
+
+describe('credential weight validation', () => {
+  test('accepts the default range and non-positive scheduling exclusions', () => {
+    expect(parseCredentialWeightText('')).toBeUndefined();
+    expect(parseCredentialWeightText('1')).toBe(1);
+    expect(parseCredentialWeightText('0')).toBe(0);
+    expect(parseCredentialWeightText('-2')).toBe(-2);
+    expect(parseCredentialWeightText(String(MAX_CREDENTIAL_WEIGHT))).toBe(MAX_CREDENTIAL_WEIGHT);
+  });
+
+  test('rejects non-integers and values above the backend maximum', () => {
+    expect(validateCredentialWeightText('1.5')).toBe('integer');
+    expect(validateCredentialWeightText('1e3')).toBe('integer');
+    expect(validateCredentialWeightText(String(MAX_CREDENTIAL_WEIGHT + 1))).toBe('max');
+    expect(parseCredentialWeightText('1.5')).toBeUndefined();
+  });
+
+  test('reads only valid numeric response fields', () => {
+    expect(readCredentialWeight(7)).toBe(7);
+    expect(readCredentialWeight(0)).toBe(0);
+    expect(readCredentialWeight(' 7 ')).toBe(7);
+    expect(readCredentialWeight('7.5')).toBeUndefined();
+    expect(readCredentialWeight(MAX_CREDENTIAL_WEIGHT + 1)).toBeUndefined();
+  });
+});