✨ 添加通道连接特性，可用+连接两个通道，连接后将交换双方的接收端

tests/test_chan.py

@@ -1,30 +1,34 @@
 import time
 
 from magicoca.chan import Chan
-from multiprocessing import Process
+from multiprocessing import Process, set_start_method
 
 
+
+def p1f(chan: Chan[int]):
+    for i in range(10):
+        chan << i
+    chan << -1
+
+def p2f(chan: Chan[int]):
+    recv_ans = []
+    while True:
+        a = int << chan
+        print("Recv", a)
+        recv_ans.append(a)
+        if a == -1:
+            break
+    if recv_ans != list(range(10)) + [-1]:
+        raise ValueError("Chan Shift Test Failed")
+
 class TestChan:
+
+    def test_test(self):
+        print("Test is running")
+
     def test_chan_shift(self):
+        """测试运算符"""
         ch = Chan[int]()
-
-        def p1f(chan: Chan[int]):
-            for i in range(10):
-                time.sleep(1)
-                chan << i
-            chan << -1
-
-        def p2f(chan: Chan[int]):
-            recv_ans = []
-            while True:
-                a = int << chan
-                print("Recv", a)
-                recv_ans.append(a)
-                if a == -1:
-                    break
-            if recv_ans != list(range(10)) + [-1]:
-                raise ValueError("Chan Shift Test Failed")
-
         print("Test Chan Shift")
         p1 = Process(target=p1f, args=(ch,))
         p2 = Process(target=p2f, args=(ch,))
@@ -34,25 +38,9 @@ class TestChan:
         p2.join()
 
     def test_chan_sr(self):
+        """测试收发"""
         ch = Chan[int]()
 
-        def p1f(chan: Chan[int]):
-            for i in range(10):
-                time.sleep(1)
-                chan.send(i)
-            chan.send(-1)
-
-        def p2f(chan: Chan[int]):
-            recv_ans = []
-            while True:
-                a = chan.recv()
-                recv_ans.append(a)
-                print("Recv2", a)
-                if a == -1:
-                    break
-            if recv_ans != list(range(10)) + [-1]:
-                raise ValueError("Chan SR Test Failed")
-
         print("Test Chan SR")
         p1 = Process(target=p1f, args=(ch,))
         p2 = Process(target=p2f, args=(ch,))
@@ -60,3 +48,18 @@ class TestChan:
         p2.start()
         p1.join()
         p2.join()
+
+    def test_connect(self):
+        """测试双通道连接"""
+        chan1 = Chan[int]()
+        chan2 = Chan[int]()
+
+        chan1 + chan2
+
+        print("Test Chan Connect")
+        p1 = Process(target=p1f, args=(chan1,))
+        p2 = Process(target=p2f, args=(chan2,))
+        p1.start()
+        p2.start()
+        p1.join()
+        p2.join()