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package parsec
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestPointer(t *testing.T) {
p := Pointer{"fooo", 0}
t.Run("Advances", func(t *testing.T) {
p2 := p.Advance(2)
require.Equal(t, Pointer{"fooo", 2}, p2)
require.Equal(t, Pointer{"fooo", 0}, p)
require.Equal(t, Pointer{"fooo", 3}, p2.Advance(1))
})
t.Run("Get", func(t *testing.T) {
require.Equal(t, "fooo", p.Get())
require.Equal(t, "ooo", p.Advance(1).Get())
require.Equal(t, "", p.Advance(4).Get())
require.Equal(t, "", p.Advance(10).Get())
})
}
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