package langext

import (
	"bytes"
	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
	"testing"
)

func TestWriteNopCloserWrite(t *testing.T) {
	var buf bytes.Buffer
	wc := WriteNopCloser(&buf)

	n, err := wc.Write([]byte("hello"))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	tst.AssertEqual(t, n, 5)
	tst.AssertEqual(t, buf.String(), "hello")
}

func TestWriteNopCloserClose(t *testing.T) {
	var buf bytes.Buffer
	wc := WriteNopCloser(&buf)

	err := wc.Close()
	if err != nil {
		t.Errorf("expected nil error from no-op Close, got %v", err)
	}

	// Can still write after close (it's a no-op)
	_, err = wc.Write([]byte("after"))
	if err != nil {
		t.Errorf("expected to write after Close, got %v", err)
	}
	tst.AssertEqual(t, buf.String(), "after")
}