feat: add eval:inventory CLI command and reporting logic (#28009)

scripts/tests/eval-inventory.test.ts

@@ -0,0 +1,185 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import path from 'node:path';
+import { describe, expect, it } from 'vitest';
+import {
+  collectInventory,
+  formatInventoryReport,
+  type InventoryResult,
+} from '../utils/eval-inventory.js';
+import type { EvalCaseRecord } from '../utils/eval-analysis.js';
+
+function makeCaseRecord(
+  overrides: Partial<EvalCaseRecord> = {},
+): EvalCaseRecord {
+  return {
+    filePath: '/repo/evals/test.eval.ts',
+    relativePath: 'evals/test.eval.ts',
+    helperName: 'evalTest',
+    baseHelperName: 'evalTest',
+    policy: 'USUALLY_PASSES',
+    name: 'test case',
+    hasFiles: false,
+    hasPrompt: true,
+    location: { line: 1, column: 1 },
+    ...overrides,
+  };
+}
+
+describe('eval-inventory', () => {
+  describe('collectInventory', () => {
+    it('discovers eval files from the real evals directory', async () => {
+      const repoRoot = path.resolve(import.meta.dirname, '../../');
+      const result = await collectInventory(repoRoot);
+
+      expect(result.totalFiles).toBeGreaterThanOrEqual(36);
+      expect(result.totalCases).toBeGreaterThanOrEqual(90);
+      expect(result.files.length).toBe(result.totalFiles);
+      expect(result.cases.length).toBe(result.totalCases);
+
+      for (const evalCase of result.cases) {
+        expect(evalCase.name).toBeTruthy();
+        expect(evalCase.relativePath).toBeTruthy();
+        expect(evalCase.relativePath).toMatch(/^evals\//);
+      }
+    });
+
+    it('returns zero counts for a directory with no eval files', async () => {
+      const result = await collectInventory(import.meta.dirname);
+
+      expect(result.totalFiles).toBe(0);
+      expect(result.totalCases).toBe(0);
+      expect(result.files).toEqual([]);
+      expect(result.cases).toEqual([]);
+    });
+  });
+
+  describe('formatInventoryReport', () => {
+    it('includes summary line with correct counts', () => {
+      const result: InventoryResult = {
+        totalFiles: 2,
+        totalCases: 3,
+        files: [],
+        cases: [
+          makeCaseRecord({ policy: 'ALWAYS_PASSES', name: 'case-1' }),
+          makeCaseRecord({ policy: 'USUALLY_PASSES', name: 'case-2' }),
+          makeCaseRecord({ policy: 'USUALLY_PASSES', name: 'case-3' }),
+        ],
+        diagnostics: [],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).toContain('2 files · 3 cases · 0 diagnostics');
+    });
+
+    it('groups cases by policy', () => {
+      const result: InventoryResult = {
+        totalFiles: 1,
+        totalCases: 2,
+        files: [],
+        cases: [
+          makeCaseRecord({
+            policy: 'ALWAYS_PASSES',
+            name: 'stable test',
+          }),
+          makeCaseRecord({
+            policy: 'USUALLY_PASSES',
+            name: 'flaky test',
+          }),
+        ],
+        diagnostics: [],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).toContain('By Policy');
+      expect(report).toContain('ALWAYS_PASSES (1 cases)');
+      expect(report).toContain('USUALLY_PASSES (1 cases)');
+      expect(report).toContain('• stable test');
+      expect(report).toContain('• flaky test');
+    });
+
+    it('groups cases by suite name', () => {
+      const result: InventoryResult = {
+        totalFiles: 1,
+        totalCases: 2,
+        files: [],
+        cases: [
+          makeCaseRecord({ suiteName: 'default', name: 'suite-test' }),
+          makeCaseRecord({ name: 'no-suite-test' }),
+        ],
+        diagnostics: [],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).toContain('By Suite');
+      expect(report).toContain('default (1 cases)');
+      expect(report).toContain('(no suite) (1 cases)');
+    });
+
+    it('shows diagnostics section when diagnostics exist', () => {
+      const result: InventoryResult = {
+        totalFiles: 1,
+        totalCases: 0,
+        files: [],
+        cases: [],
+        diagnostics: [
+          {
+            severity: 'warning',
+            message: 'Could not resolve policy',
+            filePath: '/repo/evals/bad.eval.ts',
+            location: { line: 5, column: 3 },
+          },
+        ],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).toContain('Diagnostics');
+      expect(report).toContain('1 diagnostics');
+      expect(report).toContain(
+        '⚠ /repo/evals/bad.eval.ts:5:3 — Could not resolve policy',
+      );
+    });
+
+    it('omits diagnostics section when there are none', () => {
+      const result: InventoryResult = {
+        totalFiles: 1,
+        totalCases: 1,
+        files: [],
+        cases: [makeCaseRecord()],
+        diagnostics: [],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).not.toContain('Diagnostics');
+      expect(report).not.toContain('⚠');
+    });
+
+    it('includes helper name in case listing', () => {
+      const result: InventoryResult = {
+        totalFiles: 1,
+        totalCases: 1,
+        files: [],
+        cases: [
+          makeCaseRecord({
+            helperName: 'customHelper',
+            name: 'custom test',
+          }),
+        ],
+        diagnostics: [],
+      };
+
+      const report = formatInventoryReport(result);
+
+      expect(report).toContain('• custom test [customHelper]');
+    });
+  });
+});

scripts/tests/test-setup.ts

@@ -6,7 +6,10 @@
 
 import { vi } from 'vitest';
 
-vi.mock('fs', () => ({
-  ...vi.importActual('fs'),
-  appendFileSync: vi.fn(),
-}));
+vi.mock('fs', async () => {
+  const actual = await vi.importActual<typeof import('fs')>('fs');
+  return {
+    ...actual,
+    appendFileSync: vi.fn(),
+  };
+});