move trimming whitespace to error-check helpers

Signed-off-by: Sebastiaan van Stijn <[email protected]>

client/client.go

@@ -16,11 +16,9 @@ func isValidCredsMessage(msg string) error {
 	if credentials.IsCredentialsMissingServerURLMessage(msg) {
 		return credentials.NewErrCredentialsMissingServerURL()
 	}
-
 	if credentials.IsCredentialsMissingUsernameMessage(msg) {
 		return credentials.NewErrCredentialsMissingUsername()
 	}
-
 	return nil
 }
 
@@ -36,13 +34,10 @@ func Store(program ProgramFunc, creds *credentials.Credentials) error {
 
 	out, err := cmd.Output()
 	if err != nil {
-		t := strings.TrimSpace(string(out))
-
-		if isValidErr := isValidCredsMessage(t); isValidErr != nil {
+		if isValidErr := isValidCredsMessage(string(out)); isValidErr != nil {
 			err = isValidErr
 		}
-
-		return fmt.Errorf("error storing credentials - err: %v, out: `%s`", err, t)
+		return fmt.Errorf("error storing credentials - err: %v, out: `%s`", err, strings.TrimSpace(string(out)))
 	}
 
 	return nil
@@ -55,13 +50,11 @@ func Get(program ProgramFunc, serverURL string) (*credentials.Credentials, error
 
 	out, err := cmd.Output()
 	if err != nil {
-		t := strings.TrimSpace(string(out))
-
-		if credentials.IsErrCredentialsNotFoundMessage(t) {
+		if credentials.IsErrCredentialsNotFoundMessage(string(out)) {
 			return nil, credentials.NewErrCredentialsNotFound()
 		}
 
-		if isValidErr := isValidCredsMessage(t); isValidErr != nil {
+		if isValidErr := isValidCredsMessage(string(out)); isValidErr != nil {
 			err = isValidErr
 		}
 

credentials/error.go

@@ -1,6 +1,9 @@
 package credentials
 
-import "errors"
+import (
+	"errors"
+	"strings"
+)
 
 const (
 	// ErrCredentialsNotFound standardizes the not found error, so every helper returns
@@ -47,7 +50,7 @@ func IsErrCredentialsNotFound(err error) bool {
 // This function helps to check messages returned by an
 // external program via its standard output.
 func IsErrCredentialsNotFoundMessage(err string) bool {
-	return err == errCredentialsNotFoundMessage
+	return strings.TrimSpace(err) == errCredentialsNotFoundMessage
 }
 
 // errCredentialsMissingServerURL represents an error raised
@@ -104,7 +107,7 @@ func IsCredentialsMissingServerURL(err error) bool {
 // IsCredentialsMissingServerURLMessage checks for an
 // errCredentialsMissingServerURL in the error message.
 func IsCredentialsMissingServerURLMessage(err string) bool {
-	return err == errCredentialsMissingServerURLMessage
+	return strings.TrimSpace(err) == errCredentialsMissingServerURLMessage
 }
 
 // IsCredentialsMissingUsername returns true if the error
@@ -117,5 +120,5 @@ func IsCredentialsMissingUsername(err error) bool {
 // IsCredentialsMissingUsernameMessage checks for an
 // errCredentialsMissingUsername in the error message.
 func IsCredentialsMissingUsernameMessage(err string) bool {
-	return err == errCredentialsMissingUsernameMessage
+	return strings.TrimSpace(err) == errCredentialsMissingUsernameMessage
 }