package base

import (
	"bufio"
	"bytes"
	"testing"

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

var casesBody = []struct {
	name string
	h    Header
	byts []byte
}{
	{
		"standard",
		Header{
			"Content-Length": HeaderValue{"4"},
		},
		[]byte{0x01, 0x02, 0x03, 0x04},
	},
}

func TestBodyRead(t *testing.T) {
	for _, ca := range casesBody {
		t.Run(ca.name, func(t *testing.T) {
			var p body
			err := p.read(ca.h, bufio.NewReader(bytes.NewReader(ca.byts)))
			require.NoError(t, err)
			require.Equal(t, ca.byts, []byte(p))
		})
	}
}

func TestBodyReadErrors(t *testing.T) {
	for _, ca := range []struct {
		name string
		h    Header
		byts []byte
		err  string
	}{
		{
			"invalid body",
			Header{
				"Content-Length": HeaderValue{"17"},
			},
			[]byte("123"),
			"unexpected EOF",
		},
		{
			"invalid content-length",
			Header{
				"Content-Length": HeaderValue{"aaa"},
			},
			[]byte("123"),
			"invalid Content-Length",
		},
		{
			"too big content-length",
			Header{
				"Content-Length": HeaderValue{"1000000"},
			},
			[]byte("123"),
			"Content-Length exceeds 131072 (it's 1000000)",
		},
	} {
		t.Run(ca.name, func(t *testing.T) {
			var p body
			err := p.read(ca.h, bufio.NewReader(bytes.NewReader(ca.byts)))
			require.EqualError(t, err, ca.err)
		})
	}
}

func TestBodyMarshal(t *testing.T) {
	for _, ca := range casesBody {
		t.Run(ca.name, func(t *testing.T) {
			buf := body(ca.byts).marshal()
			require.Equal(t, ca.byts, buf)
		})
	}
}