fix(config): add unknown test config format

Signed-off-by: Fabian Wienand <[email protected]>

pkg/config/jobdescriptor.go

@@ -8,6 +8,7 @@ package config
 import (
 	"encoding/json"
 	"fmt"
+	"strings"
 
 	"gopkg.in/yaml.v3"
 )
@@ -17,17 +18,16 @@ type JobDescFormat int
 
 // List of supported job descriptor formats
 const (
-	JobDescFormatJSON JobDescFormat = iota
+	JobDescFormatUnknown JobDescFormat = iota
+	JobDescFormatJSON
 	JobDescFormatYAML
 )
 
 // ParseJobDescriptor validates a job descriptor's well-formedness, and returns a
 // JSON-formatted descriptor if it was provided in a different format.
 // The currently supported format are JSON and YAML.
 func ParseJobDescriptor(data []byte, jobDescFormat JobDescFormat) ([]byte, error) {
-	var (
-		jobDesc = make(map[string]interface{})
-	)
+	jobDesc := make(map[string]interface{})
 	switch jobDescFormat {
 	case JobDescFormatJSON:
 		if err := json.Unmarshal(data, &jobDesc); err != nil {
@@ -37,6 +37,8 @@ func ParseJobDescriptor(data []byte, jobDescFormat JobDescFormat) ([]byte, error
 		if err := yaml.Unmarshal(data, &jobDesc); err != nil {
 			return nil, fmt.Errorf("failed to parse YAML job descriptor: %w", err)
 		}
+	default:
+		return nil, fmt.Errorf("unknown job descriptor format")
 	}
 
 	// then marshal the structure back to JSON
@@ -46,3 +48,25 @@ func ParseJobDescriptor(data []byte, jobDescFormat JobDescFormat) ([]byte, error
 	}
 	return jobDescJSON, nil
 }
+
+func JobDescFormatFromString(jobDescFormat string) JobDescFormat {
+	switch {
+	case strings.ToLower(jobDescFormat) == "json":
+		return JobDescFormatJSON
+	case strings.ToLower(jobDescFormat) == "yaml":
+		return JobDescFormatYAML
+	default:
+		return JobDescFormatUnknown
+	}
+}
+
+func (j JobDescFormat) String() string {
+	switch j {
+	case JobDescFormatJSON:
+		return "json"
+	case JobDescFormatYAML:
+		return "yaml"
+	default:
+		return "unknown"
+	}
+}