ws/ws/message_test.go

package ws

import (
	"io"
	"bytes"
	"testing"
)


func TestSimpleMessageReading(t *testing.T) {

	cases := []struct{
		Name       string
		ReadBuffer []byte
		Expected   Message
		Err        error
	}{
		{ // FIN ; TEXT ; Unmasked -> error
			"must fail on unmasked frame",
			[]byte{0x81,0x05,0x68,0x65,0x6c,0x6c,0x6f},
			Message{},
			UnmaskedFrameErr,
		},
		{ // FIN ; TEXT ; hello
			"simple hello text message",
			[]byte{0x81,0x85,0x00,0x00,0x00,0x00,0x68,0x65,0x6c,0x6c,0x6f},
			Message{ true, TEXT, 5, []byte("hello") },
			nil,
		},
		{ // FIN ; BINARY ; hello
			"simple hello binary message",
			[]byte{0x82,0x85,0x00,0x00,0x00,0x00,0x68,0x65,0x6c,0x6c,0x6f},
			Message{ true, BINARY, 5, []byte("hello") },
			nil,
		},
		{ // FIN ; BINARY ; test unmasking
			"unmasking test",
			[]byte{0x82,0x88,0x01,0x02,0x03,0x04,0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80},
			Message{ true, BINARY, 8, []byte{0x11,0x22,0x33,0x44,0x51,0x62,0x73,0x84} },
			nil,
		},
		{ // FIN=0 ; TEXT ;
			"non final frame",
			[]byte{0x01,0x82,0x00,0x00,0x00,0x00,0x01,0x02},
			Message{ false, TEXT, 2, []byte{0x01,0x02} },
			nil,
		},
	}

	for _, tc := range cases{

		t.Run(tc.Name, func(t *testing.T){

			reader := bytes.NewBuffer(tc.ReadBuffer)

			got, err := readMessage(reader)

			if err != tc.Err {
				t.Errorf("Expected %v error, got %v", tc.Err, err)
			}

			// do not check message if error expected
			if tc.Err != nil {
				return
			}

			// check FIN
			if got.Final != tc.Expected.Final {
				t.Errorf("Expected FIN=%t, got %t", tc.Expected.Final, got.Final)
			}

			// check OpCode
			if got.Type != tc.Expected.Type {
				t.Errorf("Expected TYPE=%x, got %x", tc.Expected.Type, got.Type)
			}

			// check Size
			if got.Size != tc.Expected.Size {
				t.Errorf("Expected SIZE=%d, got %d", tc.Expected.Size, got.Size)
			}

			// check Data
			if string(got.Data) != string(tc.Expected.Data) {
				t.Errorf("Expected Data='%s', got '%d'", tc.Expected.Data, got.Data)
			}

		})

	}

}


func TestReadEOF(t *testing.T) {

	cases := []struct{
		Name          string
		ReadBuffer    []byte
		eof           bool
		unmaskedError bool
	}{
		{
			"no byte",
			[]byte{},
			true, false,
		}, {
			"only opcode",
			[]byte{0x82},
			true, false,
		}, {
			"only opcode and 0 length",
			[]byte{0x82,0x00},
			false, true,
		}, {
			"missing extended 16 bits length",
			[]byte{0x82,126},
			true, false,
		}, {
			"incomplete extended 16 bits length",
			[]byte{0x82,126, 0x00},
			true, false,
		}, {
			"complete extended 16 bits length",
			[]byte{0x82,126, 0x00, 0x00},
			false, true,
		}, {
			"missing extended 64 bits length",
			[]byte{0x82,127},
			true, false,
		}, {
			"incomplete extended 64 bits length",
			[]byte{0x82,127, 0x00},
			true, false,
		}, {
			"incomplete extended 64 bits length",
			[]byte{0x82,127, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
			true, false,
		}, {
			"complete extended 64 bits length",
			[]byte{0x82,127, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
			false, true,
		},
	}

	for _, tc := range cases{

		t.Run(tc.Name, func(t *testing.T){

			reader := bytes.NewBuffer(tc.ReadBuffer)

			got, err := readMessage(reader)

			if tc.eof {

				if err != io.EOF{
					t.Errorf("Expected EOF, got %v", err)
				}

				return
			}

			if tc.unmaskedError && err != UnmaskedFrameErr {
				t.Errorf("Expected UnmaskedFrameError, got %v", err)
			}

			if got.Size != 0x00 {
				t.Errorf("Expected a size of 0, got %d", got.Size)
			}

		})

	}

}



func TestSimpleMessageSending(t *testing.T) {

	cases := []struct{
		Name     string
		Base     Message
		Expected []byte
	}{
		{
			"simple hello text message",
			Message{ true, TEXT, 5, []byte("hello") },
			[]byte{0x81,0x05,0x68,0x65,0x6c,0x6c,0x6f},
		}, {
			"simple hello binary message",
			Message{ true, BINARY, 5, []byte("hello") },
			[]byte{0x82,0x05,0x68,0x65,0x6c,0x6c,0x6f},
		}, {
			"other simple binary message",
			Message{ true, BINARY, 8, []byte{0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80} },
			[]byte{0x82,0x08,0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80},
		}, {
			"non final frame",
			Message{ false, TEXT, 2, []byte{0x01,0x02} },
			[]byte{0x01,0x02,0x01,0x02},
		},
	}

	for _, tc := range cases{

		t.Run(tc.Name, func(t *testing.T){

			writer := new(bytes.Buffer)

			err := tc.Base.Send(writer)

			if err != nil {
				t.Errorf("expected no error, got %v", err)
				return
			}

			// check buffer
			if writer.String() != string(tc.Expected) {
				t.Errorf("expected '%x', got '%x'", tc.Expected, writer.String())
			}

		})

	}

}