update

copier_slice_test.go

@@ -75,3 +75,42 @@ func TestAndSlice(t *testing.T) {
 		t.Errorf("Expected %v, got %v", []string{"developer", "golang", "backend"}, dst)
 	}
 }
+
+func TestStructAppendSlice(t *testing.T) {
+	type person struct {
+		Name string
+		Age  int
+	}
+
+	src := person{Name: "Alice", Age: 20}
+
+	dst := []person{
+		{Name: "Charlie", Age: 40},
+	}
+
+	if err := Copy(&dst, src); err != nil {
+		t.Fatal(err)
+	}
+
+	if len(dst) != 2 {
+		t.Errorf("Expected %d elements, got %d", 2, len(dst))
+	}
+
+	t.Log(dst)
+}
+
+func TestAppendSlice(t *testing.T) {
+	src := []string{"developer", "golang", "backend"}
+	dst := []any{"do"}
+
+	if err := Copy(&dst, src); err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log(dst)
+
+	if !slices.Equal([]any{"do", "developer", "golang", "backend"}, dst) {
+		t.Errorf("Expected %v, got %v", []string{"do", "developer", "golang", "backend"}, dst)
+	}
+
+}