protobuf.js/tests/reuse.js

var tape = require("tape");

var protobuf = require("..");

tape.test("reusing", function(test) {

    protobuf.load("tests/data/simple.proto", function(err, root) {
        if (err)
            return test.fail(err.message);

        var A = root.lookup("A"),
            B = root.lookup("B");

        test.test("a writer should write", function(test) {

            var writer = protobuf.Writer.create();

            A.encodeDelimited({
                a: 1
            }, writer);

            B.encodeDelimited({
                b: 'a'
            }, writer);

            var buffer = writer.finish();

            test.equal(buffer[0], 2, "length 2");
            test.equal(buffer[1], 8, "id 1, wireType 0");
            test.equal(buffer[2], 1, "number 1");
            test.equal(buffer[3], 3, "length 3");
            test.equal(buffer[4], 10, "id 1, wireType 2");
            test.equal(buffer[5], 1, "length 1");
            test.equal(buffer[6], 97, "string 'a'");

            var reader = protobuf.Reader.create(buffer);

            test.test("and a reader should", function(test) {

                var a = A.decodeDelimited(reader);
                test.deepEqual(a, { a: 1 }, "read back the first message");

                var b = B.decodeDelimited(reader);
                test.deepEqual(b, { b: 'a' }, "read back the second message");

                test.equal(reader.pos, reader.len, "consume the reader");

                test.end();
            });

            test.end();
        });

        test.end();

    });
});