feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

scripts/check-file-sizes-core.test.mjs

@@ -0,0 +1,109 @@
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+import { mkdtempSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import test from "node:test";
+import {
+  allowedLineCount,
+  countLines,
+  evaluateFileSize,
+  parseChangedFiles,
+  resolveBaseRef,
+} from "./check-file-sizes-core.mjs";
+
+function git(repo, ...args) {
+  return execFileSync("git", args, { cwd: repo, encoding: "utf8" }).trim();
+}
+
+test("local base resolution uses the branch merge-base and fails without origin/main", () => {
+  const repo = mkdtempSync(path.join(tmpdir(), "file-size-base-"));
+  git(repo, "init", "-b", "main");
+  git(repo, "config", "user.name", "Test");
+  git(repo, "config", "user.email", "test@example.com");
+  git(repo, "commit", "--allow-empty", "-m", "base");
+  git(repo, "remote", "add", "origin", repo);
+  git(repo, "fetch", "origin", "main:refs/remotes/origin/main");
+  const base = git(repo, "rev-parse", "HEAD");
+  git(repo, "switch", "-c", "feature");
+  git(repo, "commit", "--allow-empty", "-m", "first branch commit");
+  git(repo, "commit", "--allow-empty", "-m", "second branch commit");
+
+  assert.equal(resolveBaseRef(repo, {}), base);
+  git(repo, "update-ref", "-d", "refs/remotes/origin/main");
+  assert.throws(
+    () => resolveBaseRef(repo, {}),
+    /Fetch origin\/main or set CHECK_FILE_SIZES_BASE/,
+  );
+});
+
+test("counts empty, LF, and CRLF content with the existing semantics", () => {
+  assert.equal(countLines(""), 0);
+  assert.equal(countLines("one\n"), 2);
+  assert.equal(countLines("one\r\ntwo"), 2);
+});
+
+test("new files use the configured ceiling", () => {
+  assert.equal(allowedLineCount(null, 1000), 1000);
+  assert.deepEqual(
+    evaluateFileSize({ baseLines: null, candidateLines: 1000, maxLines: 1000 }),
+    {
+      limit: 1000,
+      violates: false,
+    },
+  );
+  assert.equal(
+    evaluateFileSize({ baseLines: null, candidateLines: 1001, maxLines: 1000 })
+      .violates,
+    true,
+  );
+});
+
+test("a compliant file may not cross the ceiling", () => {
+  assert.equal(
+    evaluateFileSize({ baseLines: 996, candidateLines: 1000, maxLines: 1000 })
+      .violates,
+    false,
+  );
+  assert.equal(
+    evaluateFileSize({ baseLines: 996, candidateLines: 1003, maxLines: 1000 })
+      .violates,
+    true,
+  );
+});
+
+test("parses modifications, deletions, and renames from Git's NUL format", () => {
+  assert.deepEqual(
+    parseChangedFiles(
+      "M\0desktop/src/a.ts\0D\0desktop/src/b.ts\0R100\0desktop/src/old.ts\0desktop/src/new.ts\0",
+    ),
+    [
+      { status: "M", path: "desktop/src/a.ts" },
+      { status: "D", path: "desktop/src/b.ts" },
+      {
+        status: "R",
+        oldPath: "desktop/src/old.ts",
+        path: "desktop/src/new.ts",
+      },
+    ],
+  );
+});
+
+test("an inherited oversized file may hold or shrink but not grow", () => {
+  assert.equal(allowedLineCount(1026, 1000), 1026);
+  assert.equal(
+    evaluateFileSize({ baseLines: 1026, candidateLines: 1026, maxLines: 1000 })
+      .violates,
+    false,
+  );
+  assert.equal(
+    evaluateFileSize({ baseLines: 1026, candidateLines: 1001, maxLines: 1000 })
+      .violates,
+    false,
+  );
+  assert.equal(
+    evaluateFileSize({ baseLines: 1026, candidateLines: 1027, maxLines: 1000 })
+      .violates,
+    true,
+  );
+});