package auth

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestNewPKCEChallenge(t *testing.T) {
	p, err := NewPKCEChallenge()
	require.NoError(t, err)
	assert.NotEmpty(t, p.Verifier)
	assert.NotEmpty(t, p.Challenge)
	assert.Equal(t, "S256", p.Method)
	assert.NotEqual(t, p.Verifier, p.Challenge)
}

func TestPKCEChallengeUniqueness(t *testing.T) {
	p1, err := NewPKCEChallenge()
	require.NoError(t, err)
	p2, err := NewPKCEChallenge()
	require.NoError(t, err)
	assert.NotEqual(t, p1.Verifier, p2.Verifier)
	assert.NotEqual(t, p1.Challenge, p2.Challenge)
}

func TestComputeChallenge(t *testing.T) {
	verifier := "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk"
	expected := "E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM"
	assert.Equal(t, expected, computeChallenge(verifier))
}