Checkpoint web parity through Chromium input tasks

web/tests/unit/script-audit-integrity.test.mjs

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+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { createRequire } from "node:module";
+import test from "node:test";
+import ts from "typescript";
+
+const root = path.resolve(import.meta.dirname, "../../..");
+const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "script-audit-integrity-"));
+const require = createRequire(import.meta.url);
+for (const name of ["asset-path", "capability-gates", "scripting-platform"]) {
+  const source = fs.readFileSync(path.join(root, `web/protocol/${name}.ts`), "utf8");
+  const output = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2022 }, fileName: `${name}.ts` }).outputText
+    .replace('require("./asset-path")', 'require("./asset-path.cjs")')
+    .replace('require("./capability-gates")', 'require("./capability-gates.cjs")');
+  fs.writeFileSync(path.join(temporary, `${name}.cjs`), output);
+}
+const protocol = require(path.join(temporary, "scripting-platform.cjs"));
+const digest = "a".repeat(64);
+const manifest = { schemaVersion: 1, scripts: [{ id: "script:audit", name: "Audit", entryPath: "scripts/audit.py", sourceByteLength: 32, sourceSha256: digest, publisher: "local", signature: "b".repeat(128), keyId: "key:local", permissions: ["READ_MAIN"], dependencies: [], module: false, cpuMs: 1000, memoryBytes: 1024, wallMs: 5000, network: false, autorun: false, driverExpressions: false, addonInstall: false }] };
+
+test("M13-05H accepts a strictly ordered, chained audit log", async () => {
+  const first = await protocol.createScriptExecutionAudit(manifest, "script:audit", new Set(), { requestId: "audit:first", requestedAt: "2026-08-19T00:00:00.000Z" });
+  const second = await protocol.createScriptExecutionAudit(manifest, "script:audit", new Set(), { requestId: "audit:second", requestedAt: "2026-08-19T00:00:01.000Z" });
+  const log = await protocol.appendScriptExecutionAudit(await protocol.appendScriptExecutionAudit({ schemaVersion: 1, entries: [] }, first), second);
+  assert.deepEqual(log.entries.map((entry) => entry.sequence), [1, 2]);
+  assert.deepEqual(log.entries.map((entry) => entry.audit.requestId), ["audit:first", "audit:second"]);
+  assert.equal(log.entries[0].previousEntrySha256, null);
+  assert.equal(log.entries[1].previousEntrySha256, log.entries[0].entrySha256);
+  assert.deepEqual((await protocol.parseScriptExecutionAuditLog(log)).entries, log.entries);
+});
+
+test("M13-05H rejects replay, time, sequence and hash-chain drift", async () => {
+  const first = await protocol.createScriptExecutionAudit(manifest, "script:audit", new Set(), { requestId: "audit:one", requestedAt: "2026-08-19T00:00:00.000Z" });
+  const second = await protocol.createScriptExecutionAudit(manifest, "script:audit", new Set(), { requestId: "audit:two", requestedAt: "2026-08-19T00:00:01.000Z" });
+  const log = await protocol.appendScriptExecutionAudit(await protocol.appendScriptExecutionAudit({ schemaVersion: 1, entries: [] }, first), second);
+  await assert.rejects(protocol.appendScriptExecutionAudit(log, first), /SCRIPT_MANIFEST_INVALID/);
+  const earlier = await protocol.createScriptExecutionAudit(manifest, "script:audit", new Set(), { requestId: "audit:earlier", requestedAt: "2026-08-18T23:59:59.000Z" });
+  await assert.rejects(protocol.appendScriptExecutionAudit(log, earlier), /SCRIPT_MANIFEST_INVALID/);
+  await assert.rejects(protocol.parseScriptExecutionAuditLog({ ...log, entries: [{ ...log.entries[0], sequence: 2 }, log.entries[1]] }), /SCRIPT_MANIFEST_INVALID/);
+  await assert.rejects(protocol.parseScriptExecutionAuditLog({ ...log, entries: [{ ...log.entries[0], entrySha256: "c".repeat(64) }, log.entries[1]] }), /SCRIPT_MANIFEST_INVALID/);
+  await assert.rejects(protocol.parseScriptExecutionAuditLog({ ...log, entries: [log.entries[0], { ...log.entries[1], previousEntrySha256: "d".repeat(64) }] }), /SCRIPT_MANIFEST_INVALID/);
+});
+
+test.after(() => fs.rmSync(temporary, { recursive: true, force: true }));