Fix codecov/patch and lint errors

Fixes #270

association.go

@@ -264,6 +264,7 @@ func createClientWithContext(ctx context.Context, config Config) (*Association,
 	select {
 	case <-ctx.Done():
 		a.log.Errorf("[%s] client handshake canceled: state=%s", a.name, getAssociationStateString(a.getState()))
+		a.Close() // nolint:errcheck,gosec
 		return nil, ctx.Err()
 	case err := <-a.handshakeCompletedCh:
 		if err != nil {

association_test.go

@@ -2997,3 +2997,64 @@ func TestAssociation_Abort(t *testing.T) {
 	assert.Equal(t, i, 0, "expected no data read")
 	assert.Error(t, err, "User Initiated Abort: 1234", "expected abort reason")
 }
+
+// TestAssociation_createClientWithContext tests that the client is closed when the context is canceled.
+func TestAssociation_createClientWithContext(t *testing.T) {
+	checkGoroutineLeaks(t)
+
+	udp1, udp2, err := createUDPConnPair(t)
+	require.NoError(t, err)
+
+	loggerFactory := logging.NewDefaultLoggerFactory()
+
+	errCh1 := make(chan error)
+	errCh2 := make(chan error)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+
+	go func() {
+		_, err2 := createClientWithContext(ctx, Config{
+			NetConn:       udp1,
+			LoggerFactory: loggerFactory,
+		})
+		if err2 != nil {
+			errCh1 <- err2
+		} else {
+			errCh1 <- nil
+		}
+	}()
+
+	go func() {
+		_, err2 := createClientWithContext(ctx, Config{
+			NetConn:       udp2,
+			LoggerFactory: loggerFactory,
+		})
+		if err2 != nil {
+			errCh2 <- err2
+		} else {
+			errCh2 <- nil
+		}
+	}()
+
+	// Cancel the context immediately
+	cancel()
+
+	var err1 error
+	var err2 error
+loop:
+	for {
+		select {
+		case err1 = <-errCh1:
+			if err1 != nil && err2 != nil {
+				break loop
+			}
+		case err2 = <-errCh2:
+			if err1 != nil && err2 != nil {
+				break loop
+			}
+		}
+	}
+
+	assert.Error(t, err1, "context canceled")
+	assert.Error(t, err2, "context canceled")
+}