fix go vet warnings: call to (*T).Fatalf from a non-test goroutine

The goroutine started from test must not call t.Fatal, but t.Error. Adds
a sync.WaitGroup to make sure all goroutines have a chance to report an
error before test stops.

streaming_test.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
+	"sync"
 	"testing"
 	"time"
 )
@@ -29,11 +30,14 @@ event: delete
 data: 1234567
 :thump
 	`, largeContent))
+	var wg sync.WaitGroup
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		defer close(q)
 		err := handleReader(q, r)
 		if err != nil {
-			t.Fatalf("should not be fail: %v", err)
+			t.Errorf("should not be fail: %v", err)
 		}
 	}()
 	var passUpdate, passUpdateLarge, passNotification, passDelete, passError bool
@@ -69,6 +73,7 @@ data: 1234567
 			"update: %t, update (large): %t, notification: %t, delete: %t, error: %t",
 			passUpdate, passUpdateLarge, passNotification, passDelete, passError)
 	}
+	wg.Wait()
 }
 
 func TestStreaming(t *testing.T) {
@@ -148,11 +153,14 @@ func TestDoStreaming(t *testing.T) {
 	req = req.WithContext(ctx)
 
 	q := make(chan Event)
+	var wg sync.WaitGroup
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		defer close(q)
 		c.doStreaming(req, q)
 		if err != nil {
-			t.Fatalf("should not be fail: %v", err)
+			t.Errorf("should not be fail: %v", err)
 		}
 	}()
 	var passError bool
@@ -167,6 +175,7 @@ func TestDoStreaming(t *testing.T) {
 	if !passError {
 		t.Fatalf("have not passed through: error %t", passError)
 	}
+	wg.Wait()
 }
 
 func TestStreamingUser(t *testing.T) {

streaming_ws_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net/http"
 	"net/http/httptest"
+	"sync"
 	"testing"
 	"time"
 
@@ -151,12 +152,16 @@ func TestStreamingWS(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not be fail: %v", err)
 	}
+	var wg sync.WaitGroup
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		e := <-q
 		if errorEvent, ok := e.(*ErrorEvent); !ok {
-			t.Fatalf("should be fail: %v", errorEvent.err)
+			t.Errorf("should be fail: %v", errorEvent.err)
 		}
 	}()
+	wg.Wait()
 }
 
 func TestHandleWS(t *testing.T) {
@@ -183,10 +188,13 @@ func TestHandleWS(t *testing.T) {
 	q := make(chan Event)
 	client := NewClient(&Config{}).NewWSClient()
 
+	var wg sync.WaitGroup
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		e := <-q
 		if errorEvent, ok := e.(*ErrorEvent); !ok {
-			t.Fatalf("should be fail: %v", errorEvent.err)
+			t.Errorf("should be fail: %v", errorEvent.err)
 		}
 	}()
 	err := client.handleWS(context.Background(), ":", q)
@@ -196,24 +204,30 @@ func TestHandleWS(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	cancel()
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		e := <-q
 		if errorEvent, ok := e.(*ErrorEvent); !ok {
-			t.Fatalf("should be fail: %v", errorEvent.err)
+			t.Errorf("should be fail: %v", errorEvent.err)
 		}
 	}()
 	err = client.handleWS(ctx, "ws://"+ts.Listener.Addr().String(), q)
 	if err == nil {
 		t.Fatalf("should be fail: %v", err)
 	}
 
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		e := <-q
 		if errorEvent, ok := e.(*ErrorEvent); !ok {
-			t.Fatalf("should be fail: %v", errorEvent.err)
+			t.Errorf("should be fail: %v", errorEvent.err)
 		}
 	}()
 	client.handleWS(context.Background(), "ws://"+ts.Listener.Addr().String(), q)
+
+	wg.Wait()
 }
 
 func TestDialRedirect(t *testing.T) {