--test-concurrency

测试运行器 CLI 将同时执行的测试文件的最大数量。如果 --test-isolation 设置为 'none'，则忽略此标志，并发性为 1。否则，并发默认为 os.availableParallelism() - 1。

¥The maximum number of test files that the test runner CLI will execute concurrently. If --test-isolation is set to 'none', this flag is ignored and concurrency is one. Otherwise, concurrency defaults to os.availableParallelism() - 1.