Move consumeSlow() under test utils

Signed-off-by: Tõnis Tiigi <tonistiigi@gmail.com> (github: tonistiigi)
Upstream-commit: 8a81c462722c7158e481f974f628843e7c172158
Component: engine

components/engine/integration-cli/utils.go

@@ -253,3 +253,19 @@ func makeRandomString(n int) string {
 	}
 	return string(b)
 }
+
+func consumeSlow(reader io.Reader, chunkSize int, interval time.Duration) (n int, err error) {
+	buffer := make([]byte, chunkSize)
+	for {
+		var readBytes int
+		readBytes, err = reader.Read(buffer)
+		n += readBytes
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			return
+		}
+		time.Sleep(interval)
+	}
+}