test: Phase 2-4 — 添加 12 个测试文件 (+321 tests, 968 total)

Phase 2 (轻 Mock): envUtils, sleep/sequential, memoize, groupToolUses, dangerousPatterns, outputLimits
Phase 3 (补全): zodToJsonSchema, PermissionMode, envValidation
Phase 4 (工具模块): mcpStringUtils, destructiveCommandWarning, commandSemantics

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/shell/__tests__/outputLimits.test.ts

@@ -0,0 +1,67 @@
+import { mock, describe, expect, test, afterEach } from "bun:test";
+
+// Mock debug.ts to cut the bootstrap/state dependency chain
+mock.module("src/utils/debug.ts", () => ({
+  logForDebugging: () => {},
+  isDebugMode: () => false,
+  isDebugToStdErr: () => false,
+  getDebugFilePath: () => null,
+  getDebugFilter: () => null,
+  getMinDebugLogLevel: () => "debug",
+  getDebugLogPath: () => "/tmp/mock-debug.log",
+  flushDebugLogs: async () => {},
+  enableDebugLogging: () => false,
+  setHasFormattedOutput: () => {},
+  getHasFormattedOutput: () => false,
+  logAntError: () => {},
+}));
+
+const {
+  getMaxOutputLength,
+  BASH_MAX_OUTPUT_UPPER_LIMIT,
+  BASH_MAX_OUTPUT_DEFAULT,
+} = await import("../outputLimits");
+
+describe("outputLimits constants", () => {
+  test("BASH_MAX_OUTPUT_UPPER_LIMIT is 150000", () => {
+    expect(BASH_MAX_OUTPUT_UPPER_LIMIT).toBe(150_000);
+  });
+
+  test("BASH_MAX_OUTPUT_DEFAULT is 30000", () => {
+    expect(BASH_MAX_OUTPUT_DEFAULT).toBe(30_000);
+  });
+});
+
+describe("getMaxOutputLength", () => {
+  const saved = process.env.BASH_MAX_OUTPUT_LENGTH;
+
+  afterEach(() => {
+    if (saved === undefined) delete process.env.BASH_MAX_OUTPUT_LENGTH;
+    else process.env.BASH_MAX_OUTPUT_LENGTH = saved;
+  });
+
+  test("returns default when env not set", () => {
+    delete process.env.BASH_MAX_OUTPUT_LENGTH;
+    expect(getMaxOutputLength()).toBe(30_000);
+  });
+
+  test("returns parsed value when valid", () => {
+    process.env.BASH_MAX_OUTPUT_LENGTH = "50000";
+    expect(getMaxOutputLength()).toBe(50_000);
+  });
+
+  test("caps at upper limit", () => {
+    process.env.BASH_MAX_OUTPUT_LENGTH = "999999";
+    expect(getMaxOutputLength()).toBe(150_000);
+  });
+
+  test("returns default for invalid value", () => {
+    process.env.BASH_MAX_OUTPUT_LENGTH = "not-a-number";
+    expect(getMaxOutputLength()).toBe(30_000);
+  });
+
+  test("returns default for negative value", () => {
+    process.env.BASH_MAX_OUTPUT_LENGTH = "-1";
+    expect(getMaxOutputLength()).toBe(30_000);
+  });
+});