test: update test case9

Author: abin-z

tests/test_thread_pool.cpp

@@ -624,7 +624,9 @@ TEST_CASE("destructor waits for all tasks", "[destructor][RAII]")
 TEST_CASE("invalid thread counts are rejected", "[validate][range]")
 {
   REQUIRE_THROWS_AS(abin::threadpool(0), std::invalid_argument);                             // zero
-  REQUIRE_THROWS_AS(abin::threadpool(4097), std::invalid_argument);                          // too large
+  REQUIRE_THROWS_AS(abin::threadpool(1025), std::invalid_argument);                          // too large
+  REQUIRE_THROWS_AS(abin::threadpool(2048), std::invalid_argument);                          // too large
+  REQUIRE_THROWS_AS(abin::threadpool(4096), std::invalid_argument);                          // too large
   REQUIRE_THROWS_AS(abin::threadpool(-1), std::invalid_argument);                            // negative
   REQUIRE_THROWS_AS(abin::threadpool(static_cast<std::size_t>(-5)), std::invalid_argument);  // negative converted
 
@@ -640,9 +642,9 @@ TEST_CASE("invalid thread counts are rejected", "[validate][range]")
   REQUIRE_NOTHROW(abin::threadpool(1024));
   REQUIRE_NOTHROW(abin::threadpool(1024));
   REQUIRE_NOTHROW(abin::threadpool(1024));
-  REQUIRE_NOTHROW(abin::threadpool(1536));
-  REQUIRE_NOTHROW(abin::threadpool(1792));
-  REQUIRE_NOTHROW(abin::threadpool(1920));
-  // REQUIRE_NOTHROW(abin::threadpool(2048));
+  // REQUIRE_NOTHROW(abin::threadpool(1536));
+  // REQUIRE_NOTHROW(abin::threadpool(1792));
+  // REQUIRE_NOTHROW(abin::threadpool(1920)); // 1920 偶尔能通过
+  // REQUIRE_NOTHROW(abin::threadpool(2048)); // 数量级过大，可能会导致系统资源耗尽，测试环境不稳定(macos测试不通过)
   // REQUIRE_NOTHROW(abin::threadpool(4096));
 }