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package parsec
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestState_Advance(t *testing.T) {
ps := InputString("fooo")
require.Equal(t, 0, ps.Pos)
ps.Advance(2)
require.Equal(t, 2, ps.Pos)
ps.Advance(1)
require.Equal(t, 3, ps.Pos)
}
func TestState_Get(t *testing.T) {
ps := InputString("fooo")
require.Equal(t, "fooo", ps.Get())
ps.Advance(1)
require.Equal(t, "ooo", ps.Get())
ps.Advance(4)
require.Equal(t, "", ps.Get())
ps.Advance(10)
require.Equal(t, "", ps.Get())
}
func TestState_Errors(t *testing.T) {
ps := InputString("fooo")
ps.ErrorHere("hello")
require.Equal(t, "offset 0: Expected hello", ps.Error.Error())
require.Equal(t, 0, ps.Error.Pos())
require.True(t, ps.Errored())
ps.ClearError()
require.False(t, ps.Errored())
ps.Advance(2)
ps.ErrorHere("hello2")
require.Equal(t, "offset 2: Expected hello2", ps.Error.Error())
require.Equal(t, 2, ps.Error.Pos())
require.True(t, ps.Errored())
}
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