cm: add rudimentary test for SetOK and SetErr

Author: ydnar

cm/result_test.go

@@ -13,13 +13,29 @@ var (
 )
 
 type resulter[OK, Err any] interface {
+	SetOK(OK)
+	SetErr(Err)
 	IsOK() bool
 	IsErr() bool
 	OK() *OK
 	Err() *Err
 	Result() (OK, Err, bool)
 }
 
+func TestResultSetOKSetErr(t *testing.T) {
+	var r Result[string, int32, string]
+
+	r.SetOK(12345)
+	if want, got := int32(12345), r.OK(); *got != want {
+		t.Errorf("OK(): %v, expected %v", got, want)
+	}
+
+	r.SetErr("error")
+	if want, got := "error", r.Err(); *got != want {
+		t.Errorf("Err(): %v, expected %v", got, want)
+	}
+}
+
 func TestResultOKOrErr(t *testing.T) {
 	r1 := OK[Result[string, string, struct{}]]("hello")
 	if ok := r1.OK(); ok == nil {