Method TestBuffer_CopyRefAndFree

mem/buffers_test.go:185–214

Tests that a buffer created with Copy, on which an additional reference is acquired, which when later freed, returns the underlying byte slice to the buffer pool.

(t *testing.T)

// acquired, which when later freed, returns the underlying byte slice to the
// buffer pool.
func (s) TestBuffer_CopyRefAndFree(t *testing.T) {
	data := []byte("abcd")
	testPool := &singleBufferPool{
		t:    t,
		data: &data,
	}

	buf := mem.Copy(data, testPool)
	if got := buf.ReadOnlyData(); !bytes.Equal(got, data) {
		t.Fatalf("Buffer contains data %s, want %s", string(got), string(data))
	}

	buf.Ref()
	if got := buf.ReadOnlyData(); !bytes.Equal(got, []byte(data)) {
		t.Fatalf("New reference to the Buffer contains data %s, want %s", string(got), string(data))
	}

	// Verify that the free function is not invoked when all references are yet
	// to be freed.
	buf.Free()
	if testPool.data == nil {
		t.Fatalf("Free function called before all references freed")
	}

	// Verify that the free function is invoked when all references are freed.
	buf.Free()
	if testPool.data != nil {
		t.Fatalf("Free never called")
	}
}

func (s) TestBuffer_ReadOnlyDataAfterFree(t *testing.T) {
	// Verify that reading before freeing does not panic.