1 files changed, 8 insertions, 7 deletions
diff --git a/pipe/pipe_test.go b/pipe/pipe_test.go
index e71b05b..950d039 100644
--- a/pipe/pipe_test.go
+++ b/pipe/pipe_test.go
@@ -20,12 +20,12 @@ func createCountPipe() <-chan int {
 	return cout
 }
 
-func multiply(in int) int {
-	return in * Multiplier
+func multiply(in int) (int, error) {
+	return in * Multiplier, nil
 }
 
-func devide(in int) int {
-	return in / Multiplier
+func devide(in int) (int, error) {
+	return in / Multiplier, nil
 }
 
 func TestProc(t *testing.T) {
@@ -81,13 +81,14 @@ func createBuffers() []*buffer {
 	return buffers
 }
 
-func multiplyBuffer(in *buffer) *buffer {
+func multiplyBuffer(in *buffer) (*buffer, error) {
 	in.value = in.value * Multiplier
-	return in
+	return in, nil
 }
 
-func devideBuffer(in *buffer) {
+func devideBuffer(in *buffer) error {
 	in.value = in.value / Multiplier
+	return nil
 }
 
 func TestTailProc(t *testing.T) {