feat: TUI 命令 stop/pause/continue + 单文件进度条改为文件计数轮询

tests/test_transfer.py

@@ -1,6 +1,7 @@
 """transfer.py 核心逻辑测试：解析器 / 日志轮转 / 参数解析 / 后端命令构建"""
 import re
 import os
+import subprocess
 import sys
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
@@ -307,3 +308,61 @@ def test_rsync_verify_cmd():
 def test_rsync_verify_cmd_no_bwlimit():
     cmd = transfer.RsyncBackend.build_verify_cmd("a/", "b/")
     assert "--bwlimit" not in " ".join(cmd)
+
+# ---------- 暂停/继续/停止 (TUI 命令) ----------
+
+def _proc_state(pid: int) -> str:
+    with open(f"/proc/{pid}/stat") as fh:
+        return fh.read().split()[2]  # 状态字段: R/S/T/D/Z
+
+
+def _make_runner(tmp_path) -> "transfer.TaskRunner":
+    cfg = transfer.TransferConfig("s", "d")
+    lm = transfer.LogManager(str(tmp_path), keep=20)
+    return transfer.TaskRunner(cfg, lm)
+
+
+def test_pause_sends_sigstop(tmp_path):
+    r = _make_runner(tmp_path)
+    p = subprocess.Popen(["sleep", "30"], start_new_session=True)
+    r.proc = p
+    r.pause()
+    assert r._paused is True
+    assert _proc_state(p.pid) == "T"  # T = stopped
+    p.kill()
+    p.wait()
+
+
+def test_resume_sends_sigcont(tmp_path):
+    r = _make_runner(tmp_path)
+    p = subprocess.Popen(["sleep", "30"], start_new_session=True)
+    r.proc = p
+    r.pause()
+    r.resume()
+    assert r._paused is False
+    assert _proc_state(p.pid) in ("S", "R")  # 已恢复
+    p.kill()
+    p.wait()
+
+
+def test_pause_idempotent_when_no_proc(tmp_path):
+    r = _make_runner(tmp_path)
+    r.pause()  # 无进程不报错
+    assert r._paused is False
+
+# ---------- 文件计数 (单文件进度条数据源) ----------
+
+def test_count_files_recursive(tmp_path):
+    (tmp_path / "a.flac").write_text("x")
+    (tmp_path / "sub").mkdir()
+    (tmp_path / "sub" / "b.lrc").write_text("y")
+    (tmp_path / "sub" / "c.flac").write_text("z")
+    assert transfer.count_files(str(tmp_path)) == 3
+
+def test_count_files_missing_returns_zero():
+    assert transfer.count_files("/nonexistent/xyz") == 0
+
+def test_count_files_only_files(tmp_path):
+    (tmp_path / "a.txt").write_text("x")
+    (tmp_path / "dir1").mkdir()
+    assert transfer.count_files(str(tmp_path)) == 1  # 目录不计