add config test (#334)

Signed-off-by: Brooks Newberry <[email protected]>

cmd/release/config/config.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"encoding/json"
+	"io"
 	"os"
 )
 
@@ -63,11 +64,13 @@ func Load(configFile string) (*Config, error) {
 	if err != nil {
 		return nil, err
 	}
+	return read(f)
+}
 
+func read(r io.Reader) (*Config, error) {
 	var c Config
-	if err := json.NewDecoder(f).Decode(&c); err != nil {
+	if err := json.NewDecoder(r).Decode(&c); err != nil {
 		return nil, err
 	}
-
 	return &c, nil
 }

cmd/release/config/config_test.go

@@ -0,0 +1,20 @@
+package config
+
+import (
+	"embed"
+	"testing"
+)
+
+//go:embed test_data/config.json
+var configFS embed.FS
+
+func TestRead(t *testing.T) {
+	f, err := configFS.Open("test_data/config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := read(f); err != nil {
+		t.Fatal(err)
+	}
+}

cmd/release/config/test_data/config.json

@@ -15,7 +15,9 @@
         },
         "workspace": "/Users/pedrosuse/go/src/github.com/src/kubernetes"
     },
-    "rke2": [],
+    "rke2": {
+        "versions": []
+    },
     "auth": {
         "drone": {
             "k3s_pr": "",