Sort error keys before returning string.

internal/util/validator.go

@@ -1,12 +1,24 @@
 package util
 
-import "context"
+import (
+	"context"
+	"slices"
+)
 
 func SprintErrs(errs map[string]string) string {
 	var s string
-	for field, problem := range errs {
-		s += field + ": " + problem + "\n"
+
+	// Sort the error keys.
+	errKeys := []string{}
+	for key := range errs {
+		errKeys = append(errKeys, key)
+	}
+	slices.Sort(errKeys)
+
+	for _, key := range errKeys {
+		s += key + ": " + errs[key] + "\n"
 	}
+
 	return s
 }
 

internal/util/validator_test.go

@@ -30,12 +30,14 @@ func TestSpringErrs(t *testing.T) {
 			want: "foo: bar\n",
 		},
 		{
-			name: "multiple errors",
+			name: "sorted errors",
 			errs: map[string]string{
-				"foo": "bar",
-				"baz": "qux",
+				"a": "foo",
+				"b": "bar",
+				"c": "baz",
+				"d": "qux",
 			},
-			want: "foo: bar\nbaz: qux\n",
+			want: "a: foo\nb: bar\nc: baz\nd: qux\n",
 		},
 	}