[🤖] Add Unit-Tests

langext/io_test.go

@@ -0,0 +1,36 @@
+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")
+}