improve error message

Author: aler9

node.go

@@ -602,7 +602,7 @@ func (n *Node) WriteFrameExcept(exceptChannel *Channel, fr frame.Frame) error {
 // SendCommandLong sends a COMMAND_LONG and waits for COMMAND_ACK response.
 func (n *Node) SendCommandLong(command *common.MessageCommandLong, options *CommandOptions) (*CommandResponse, error) {
 	if n.nodeCommand == nil {
-		return nil, fmt.Errorf("command manager not initialized (dialect required)")
+		return nil, fmt.Errorf("command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 	}
 
 	if n.nodeCommand.msgCommandLong == nil {
@@ -621,7 +621,7 @@ func (n *Node) SendCommandLong(command *common.MessageCommandLong, options *Comm
 // SendCommandInt sends a COMMAND_INT and waits for COMMAND_ACK response.
 func (n *Node) SendCommandInt(command *common.MessageCommandInt, options *CommandOptions) (*CommandResponse, error) {
 	if n.nodeCommand == nil {
-		return nil, fmt.Errorf("command manager not initialized (dialect required)")
+		return nil, fmt.Errorf("command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 	}
 
 	if n.nodeCommand.msgCommandInt == nil {

node_command_test.go

@@ -515,8 +515,7 @@ func TestNodeCommandWithoutDialect(t *testing.T) {
 		Timeout: 1 * time.Second,
 	})
 
-	require.Error(t, err)
-	require.Contains(t, err.Error(), "command manager not initialized")
+	require.EqualError(t, err, "command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 }
 
 // TestNodeCommandMultipleSimultaneous tests multiple commands in flight
@@ -1021,8 +1020,7 @@ func TestNodeCommandIntNotAvailable(t *testing.T) {
 		Timeout: 1 * time.Second,
 	})
 
-	require.Error(t, err)
-	require.Contains(t, err.Error(), "command manager not initialized")
+	require.EqualError(t, err, "command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 }
 
 // TestNodeCommandLongNotAvailable tests SendCommandLong when COMMAND_LONG not in dialect
@@ -1064,8 +1062,7 @@ func TestNodeCommandLongNotAvailable(t *testing.T) {
 		Timeout: 1 * time.Second,
 	})
 
-	require.Error(t, err)
-	require.Contains(t, err.Error(), "command manager not initialized")
+	require.EqualError(t, err, "command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 }
 
 // TestNodeCommandAckWithExtensionFields tests that extension fields are properly handled

node_test.go

@@ -781,6 +781,5 @@ func TestNodeCommandManagerNotInitialized(t *testing.T) {
 		Timeout: 1 * time.Second,
 	})
 
-	require.Error(t, err)
-	require.Contains(t, err.Error(), "command manager not initialized")
+	require.EqualError(t, err, "command manager not available (COMMAND_LONG, COMMAND_INT or COMMAND_ACK missing from dialect)")
 }