Checkpoint web parity through Chromium input tasks

web/tests/unit/script-sandbox-budget.test.mjs

@@ -0,0 +1,30 @@
+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-sandbox-budget-"));
+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 budget = { schemaVersion: 1, cpuMs: 1000, wallMs: 5000, memoryBytes: 1024 * 1024, maxMessageBytes: 4096, maxOutputBytes: 8192 };
+
+test("M13-03B accepts bounded CPU, wall, memory, message and output budgets", () => {
+  assert.deepEqual(protocol.parseScriptSandboxBudget(budget), budget);
+});
+
+test("M13-03B rejects every budget overflow and schema drift", () => {
+  for (const [field, limit] of Object.entries({ cpuMs: protocol.SCRIPT_SANDBOX_BUDGET.maxCpuMs, wallMs: protocol.SCRIPT_SANDBOX_BUDGET.maxWallMs, memoryBytes: protocol.SCRIPT_SANDBOX_BUDGET.maxMemoryBytes, maxMessageBytes: protocol.SCRIPT_SANDBOX_BUDGET.maxMessageBytes, maxOutputBytes: protocol.SCRIPT_SANDBOX_BUDGET.maxOutputBytes })) assert.throws(() => protocol.parseScriptSandboxBudget({ ...budget, [field]: limit + 1 }), /SCRIPT_BUDGET_EXCEEDED/);
+  assert.throws(() => protocol.parseScriptSandboxBudget({ ...budget, schemaVersion: 2 }), /PROTOCOL_MISMATCH/);
+});
+
+test.after(() => fs.rmSync(temporary, { recursive: true, force: true }));