fmt.Fprintf(w, "  }\n")
		fmt.Fprintf(w, "}\n")
	}

	// boilerplate at end
	fmt.Fprintf(w, "func TestCopy(t *testing.T) {\n")
	for _, s := range sizes {
		fmt.Fprintf(w, "  testCopy%d(t)\n", s)
	}
	for _, s := range usizes {
		fmt.Fprintf(w, "  testUnalignedCopy%d(t)\n", s)
	}
	fmt.Fprintf(w, "}\n")

	// gofmt result
	b := w.Bytes()

	}
	m, _ := f.Stat()
	// Mode should be copied
	assert.Equal(t, m.Mode(), 0o750)

	body, _ := io.ReadAll(f)
	// Contents should be copied
	assert.Equal(t, body, []byte("hello world"))
}

func TestCopy(t *testing.T) {
	copyTest(t, Copy)
}

func TestAtomicCopy(t *testing.T) {
	copyTest(t, AtomicCopy)
}

func TestAtomicWrite(t *testing.T) {
	d := t.TempDir()
	file := filepath.Join(d, "test")

	}
}

func TestCloneNil(t *testing.T) {
	var m1 map[string]int
	mc := Clone(m1)
	if mc != nil {
		t.Errorf("Clone(%v) = %v, want %v", m1, mc, m1)
	}
}

func TestCopy(t *testing.T) {
	mc := Clone(m1)
	Copy(mc, mc)
	if !Equal(mc, m1) {
		t.Errorf("Copy(%v, %v) = %v, want %v", m1, m1, mc, m1)
	}
	Copy(mc, map[int]int{16: 32})