[#12] Implement RedfishConfigError interface

Implement RedfishConfigError
Rename RedfishConfigError to follow airship norms IE ErrRedfish...
Update unit tests

Change-Id: I49051315460b5d261186f32bae6101a752740eae

pkg/remote/redfish/errors.go

@@ -17,14 +17,12 @@ func NewRedfishClientErrorf(format string, v ...interface{}) error {
 	return e
 }
 
-type RedfishConfigError struct {
-	aerror.AirshipError
+type ErrRedfishMissingConfig struct {
+	What string
 }
 
-func NewRedfishConfigErrorf(format string, v ...interface{}) error {
-	e := &RedfishConfigError{}
-	e.Message = fmt.Sprintf(format, v...)
-	return e
+func (e ErrRedfishMissingConfig) Error() string {
+	return "missing configuration: " + e.What
 }
 
 // Redfish client return error if response has no body.

pkg/remote/redfish/redfish.go

@@ -2,6 +2,7 @@ package redfish
 
 import (
 	"context"
+	"fmt"
 	"net/url"
 
 	redfishApi "opendev.org/airship/go-redfish/api"
@@ -84,17 +85,23 @@ func NewRedfishRemoteDirectClient(ctx context.Context,
 ) (RedfishRemoteDirect, error) {
 	if remoteURL == "" {
 		return RedfishRemoteDirect{},
-			NewRedfishConfigErrorf("redfish remote url empty")
+			ErrRedfishMissingConfig{
+				What: "redfish remote url empty",
+			}
 	}
 
 	if ephNodeID == "" {
 		return RedfishRemoteDirect{},
-			NewRedfishConfigErrorf("redfish ephemeral node id empty")
+			ErrRedfishMissingConfig{
+				What: "redfish ephemeral node id empty",
+			}
 	}
 
 	if isoPath == "" {
 		return RedfishRemoteDirect{},
-			NewRedfishConfigErrorf("redfish ephemeral node iso Path empty")
+			ErrRedfishMissingConfig{
+				What: "redfish ephemeral node iso Path empty",
+			}
 	}
 
 	cfg := &redfishClient.Configuration{
@@ -107,7 +114,10 @@ func NewRedfishRemoteDirectClient(ctx context.Context,
 
 	parsedUrl, err := url.Parse(remoteURL)
 	if err != nil {
-		return RedfishRemoteDirect{}, NewRedfishConfigErrorf("Invalid URL format: %v", err)
+		return RedfishRemoteDirect{},
+			ErrRedfishMissingConfig{
+				What: fmt.Sprintf("invalid url format: %v", err),
+			}
 	}
 
 	client := RedfishRemoteDirect{

pkg/remote/remote_direct_test.go

@@ -52,7 +52,7 @@ func TestRedfishRemoteDirectWithEmptyURL(t *testing.T) {
 
 	err := DoRemoteDirect(s)
 
-	_, ok := err.(*redfish.RedfishConfigError)
+	_, ok := err.(redfish.ErrRedfishMissingConfig)
 	assert.True(t, ok)
 }
 
@@ -68,6 +68,6 @@ func TestRedfishRemoteDirectWithEmptyIsoPath(t *testing.T) {
 
 	err := DoRemoteDirect(s)
 
-	_, ok := err.(*redfish.RedfishConfigError)
+	_, ok := err.(redfish.ErrRedfishMissingConfig)
 	assert.True(t, ok)
 }