config-audit/tests/scanners/disabled-in-schema.test.mjs

import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import { resetCounter } from '../../scanners/lib/output.mjs';
import { scan } from '../../scanners/disabled-in-schema-scanner.mjs';
import { discoverConfigFiles } from '../../scanners/lib/file-discovery.mjs';

const __dirname = fileURLToPath(new URL('.', import.meta.url));
const FIXTURES = resolve(__dirname, '../fixtures');

async function runScanner(fixtureName) {
  resetCounter();
  const path = resolve(FIXTURES, fixtureName);
  const discovery = await discoverConfigFiles(path);
  return scan(path, discovery);
}

describe('DIS scanner — basic structure', () => {
  it('reports scanner prefix DIS', async () => {
    const result = await runScanner('denied-tools-in-schema');
    assert.equal(result.scanner, 'DIS');
  });

  it('finding IDs match CA-DIS-NNN pattern', async () => {
    const result = await runScanner('denied-tools-in-schema');
    for (const f of result.findings) {
      assert.match(f.id, /^CA-DIS-\d{3}$/);
    }
  });
});

describe('DIS scanner — Bash in both arrays → finding', () => {
  it('flags Bash overlap with low severity', async () => {
    const result = await runScanner('denied-tools-in-schema');
    const f = result.findings.find(x => /both permissions\.deny and permissions\.allow/i.test(x.title || ''));
    assert.ok(f, `expected DIS finding; got: ${result.findings.map(x => x.title).join(' | ')}`);
    assert.equal(f.severity, 'low', `expected low, got ${f.severity}`);
    assert.match(String(f.evidence || ''), /Bash/);
  });

  it('evidence references the allow + deny entries', async () => {
    const result = await runScanner('denied-tools-in-schema');
    const f = result.findings.find(x => /both permissions/i.test(x.title || ''));
    assert.ok(f);
    assert.match(String(f.evidence || ''), /allow=/);
    assert.match(String(f.evidence || ''), /deny=/);
  });
});

describe('DIS scanner — clean settings → no finding', () => {
  it('healthy-project has no DIS findings', async () => {
    const result = await runScanner('healthy-project');
    const f = result.findings.find(x => /both permissions/i.test(x.title || ''));
    assert.equal(f, undefined,
      `expected no DIS finding for healthy-project; got: ${f?.title}`);
  });
});

describe('DIS scanner — orchestrator wiring', () => {
  it('DIS appears in scan-orchestrator scanner list', async () => {
    const orch = await import('../../scanners/scan-orchestrator.mjs');
    const path = resolve(FIXTURES, 'denied-tools-in-schema');
    const env = await orch.runAllScanners(path, { filterFixtures: false });
    const dis = env.scanners.find(r => r.scanner === 'DIS');
    assert.ok(dis, `expected DIS in orchestrator results; got: ${env.scanners.map(r => r.scanner).join(', ')}`);
  });
});

describe('DIS scanner — param-qualified permissions are param-aware', () => {
  // settings.json:
  //   allow: Agent(model:sonnet), WebFetch(domain:good.com), Bash(npm:*)
  //   deny:  Agent(model:opus),   WebFetch(domain:evil.com),  Bash
  // Only the bare `Bash` deny dominates an allow (Bash(npm:*)). The param-
  // qualified deny/allow pairs are DISTINCT specs (CC 2.1.178 param-matching,
  // 2.1.172 domain rules) and must NOT be flagged as dead config.

  it('flags exactly the Bash overlap (bare deny covers param allow)', async () => {
    const result = await runScanner('param-qualified-permissions');
    const f = result.findings.find(x => /both permissions/i.test(x.title || ''));
    assert.ok(f, 'expected the Bash overlap to still be flagged');
    assert.match(String(f.evidence || ''), /Bash/);
    assert.match(String(f.description || ''), /contains 1 tool\b/);
  });

  it('does NOT flag Agent(model:opus)/Agent(model:sonnet) as dead config', async () => {
    const result = await runScanner('param-qualified-permissions');
    const f = result.findings.find(x => /both permissions/i.test(x.title || ''));
    assert.doesNotMatch(String(f?.evidence || ''), /Agent/);
  });

  it('does NOT flag WebFetch(domain:good.com)/WebFetch(domain:evil.com) as dead config', async () => {
    const result = await runScanner('param-qualified-permissions');
    const f = result.findings.find(x => /both permissions/i.test(x.title || ''));
    assert.doesNotMatch(String(f?.evidence || ''), /WebFetch/);
  });
});

describe('DIS scanner — ineffective allow wildcards (CC skips unanchored tool-name globs)', () => {
  // settings.json allow: ["mcp__*", "B*", "mcp__puppeteer__*", "Bash(npm run *)", "Read"]
  // CC skips `mcp__*` and `B*` (unanchored tool-name globs) — dead config.
  // `mcp__puppeteer__*` (anchored), `Bash(npm run *)` (specifier glob) and `Read` are valid.

  it('flags the ineffective allow globs with low severity', async () => {
    const result = await runScanner('ineffective-allow-globs');
    const f = result.findings.find(x => /ineffective allow wildcard/i.test(x.title || ''));
    assert.ok(f, `expected ineffective-allow-glob finding; got: ${result.findings.map(x => x.title).join(' | ')}`);
    assert.equal(f.severity, 'low', `expected low, got ${f.severity}`);
    assert.match(f.id, /^CA-DIS-\d{3}$/);
  });

  it('evidence cites only the unanchored globs, not the valid entries', async () => {
    const result = await runScanner('ineffective-allow-globs');
    const f = result.findings.find(x => /ineffective allow wildcard/i.test(x.title || ''));
    assert.ok(f);
    assert.match(String(f.evidence || ''), /mcp__\*/);
    assert.match(String(f.evidence || ''), /B\*/);
    assert.doesNotMatch(String(f.evidence || ''), /puppeteer/); // anchored MCP glob is valid
    assert.doesNotMatch(String(f.evidence || ''), /npm run/);   // specifier glob is valid
  });

  it('clean settings (no unanchored globs) → no ineffective-allow finding', async () => {
    const result = await runScanner('healthy-project');
    const f = result.findings.find(x => /ineffective allow wildcard/i.test(x.title || ''));
    assert.equal(f, undefined, `expected no ineffective-allow finding; got: ${f?.title}`);
  });
});

describe('DIS scanner — deny-all glob Tool(*) kills a bare allow (end-to-end)', () => {
  // settings.json: allow: ["Bash"], deny: ["Bash(*)"]
  // Bash(*) deny ≡ bare Bash deny → the bare Bash allow is dead config.
  it('flags the bare Bash allow as dead under a Bash(*) deny', async () => {
    const result = await runScanner('deny-all-glob');
    const f = result.findings.find(x => /both permissions\.deny and permissions\.allow/i.test(x.title || ''));
    assert.ok(f, `expected the bare Bash allow to be flagged dead; got: ${result.findings.map(x => x.title).join(' | ')}`);
    assert.match(String(f.evidence || ''), /Bash/);
  });
});