Function TestPartitionAt3

buffer_test.go:893–915

TestPartitionAt3 tests ability to overwrite buffer previously written.

(t *testing.T)

// TestPartitionAt3 tests ability to overwrite buffer previously written.
func TestPartitionAt3(t *testing.T) {
	buf := NewPartitionAt(NewMemPoolAt(5))
	buf.Write(make([]byte, 15, 15)) // allocates 3 membuffers
	buf.WriteAt([]byte("hey"), 0)
	data := make([]byte, 10)
	data = data[:3]
	buf.ReadAt(data, 0)
	if string(data) != "hey" {
		t.Error("expected hey got", string(data))
	}
	buf.WriteAt([]byte("hey"), 3)
	data = data[:5]
	buf.ReadAt(data, 1)
	if string(data) != "eyhey" {
		t.Error("expected eyhey got", string(data))
	}
	buf.WriteAt([]byte("hey"), 5)
	data = data[:7]
	buf.ReadAt(data, 1)
	if string(data) != "eyhehey" {
		t.Error("expected eyhehey got", string(data))
	}
}