add test

test/goroutine_test.go

@@ -0,0 +1,112 @@
+/*
+ * @Author: your name
+ * @Date: 2021-08-02 00:02:17
+ * @LastEditTime: 2021-08-02 00:32:36
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: \background\test\goroutine_test.go
+ */
+package test
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+)
+
+
+func TestWaitGroup(t *testing.T) {
+	var wg sync.WaitGroup
+	wg.Add(2)
+
+	go func ()  {
+		time.Sleep(3*time.Second)
+		t.Logf("job 1 done")
+		wg.Done()
+	}()
+	go func ()  {
+		time.Sleep(2 * time.Second)
+		t.Logf("job 2 done")
+		wg.Done()
+	}()
+	wg.Wait()
+
+	t.Log("all finish")
+	
+
+}
+
+func TestChanel(t *testing.T){
+	exit := make(chan bool)
+	go func ()  {
+		for {
+			select {
+			case <-exit:
+				t.Logf("exit 1")
+				return
+			case <- time.After(1 * time.Second)	:
+				t.Logf("time out ")
+			}
+		}	
+	}()
+	go func ()  {
+		for {
+			select {
+			case <-exit:
+				t.Logf("exit 2")
+				return
+			case <- time.After(1 * time.Second)	:
+				t.Logf("time out ")
+			}
+		}	
+	}()
+	time.Sleep(5 * time.Second)
+	exit <- true
+	t.Logf("finish")
+	
+	
+}
+
+func TestContext(t *testing.T){
+	ctx,cancel := context.WithCancel(context.Background())
+
+	go func ()  {
+		for {
+			select {
+			case <-ctx.Done():
+				t.Logf("exit")
+				return
+			case <- time.After(1 * time.Second)	:
+				t.Logf("time out ")
+			}
+		}	
+	}()
+	
+	go func ()  {
+		for {
+			select {
+			case <-ctx.Done():
+				t.Logf("exit")
+				return
+			case <- time.After(1 * time.Second)	:
+				t.Logf("time out ")
+			}
+		}	
+	}()
+	
+	go func ()  {
+		for {
+			select {
+			case <-ctx.Done():
+				t.Logf("exit")
+				return
+			case <- time.After(1 * time.Second)	:
+				t.Logf("time out ")
+			}
+		}	
+	}()
+	time.Sleep(5 * time.Second)
+	cancel()
+	t.Logf("finish")
+}