protobuf/js/binary/writer_test.js

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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/**
 * @fileoverview Test cases for jspb's binary protocol buffer writer. In
 * practice BinaryWriter is used to drive the Decoder and Reader test cases,
 * so only writer-specific tests are here.
 *
 * Test suite is written using Jasmine -- see http://jasmine.github.io/
 *
 * @author aappleby@google.com (Austin Appleby)
 */

goog.require('goog.crypt');
goog.require('goog.testing.asserts');
goog.require('jspb.BinaryReader');
goog.require('jspb.BinaryWriter');


/**
 * @param {function()} func This function should throw an error when run.
 */
function assertFails(func) {
  assertThrows(func);
}


describe('binaryWriterTest', function() {
  /**
   * Verifies that misuse of the writer class triggers assertions.
   */
  it('testWriteErrors', function() {
    // Submessages with invalid field indices should assert.
    var writer = new jspb.BinaryWriter();
    var dummyMessage = /** @type {!jspb.BinaryMessage} */({});

    assertFails(function() {
      writer.writeMessage(-1, dummyMessage, goog.nullFunction);
    });

    // Writing invalid field indices should assert.
    writer = new jspb.BinaryWriter();
    assertFails(function() {writer.writeUint64(-1, 1);});

    // Writing out-of-range field values should assert.
    writer = new jspb.BinaryWriter();

    assertFails(function() {writer.writeInt32(1, -Infinity);});
    assertFails(function() {writer.writeInt32(1, Infinity);});

    assertFails(function() {writer.writeInt64(1, -Infinity);});
    assertFails(function() {writer.writeInt64(1, Infinity);});

    assertFails(function() {writer.writeUint32(1, -1);});
    assertFails(function() {writer.writeUint32(1, Infinity);});

    assertFails(function() {writer.writeUint64(1, -1);});
    assertFails(function() {writer.writeUint64(1, Infinity);});

    assertFails(function() {writer.writeSint32(1, -Infinity);});
    assertFails(function() {writer.writeSint32(1, Infinity);});

    assertFails(function() {writer.writeSint64(1, -Infinity);});
    assertFails(function() {writer.writeSint64(1, Infinity);});

    assertFails(function() {writer.writeFixed32(1, -1);});
    assertFails(function() {writer.writeFixed32(1, Infinity);});

    assertFails(function() {writer.writeFixed64(1, -1);});
    assertFails(function() {writer.writeFixed64(1, Infinity);});

    assertFails(function() {writer.writeSfixed32(1, -Infinity);});
    assertFails(function() {writer.writeSfixed32(1, Infinity);});

    assertFails(function() {writer.writeSfixed64(1, -Infinity);});
    assertFails(function() {writer.writeSfixed64(1, Infinity);});
  });


  /**
   * Basic test of retrieving the result as a Uint8Array buffer
   */
  it('testGetResultBuffer', function() {
    var expected = '0864120b48656c6c6f20776f726c641a0301020320c801';

    var writer = new jspb.BinaryWriter();
    writer.writeUint32(1, 100);
    writer.writeString(2, 'Hello world');
    writer.writeBytes(3, new Uint8Array([1, 2, 3]));
    writer.writeUint32(4, 200);

    var buffer = writer.getResultBuffer();
    assertEquals(expected, goog.crypt.byteArrayToHex(buffer));
  });


  /**
   * Tests websafe encodings for base64 strings.
   */
  it('testWebSafeOption', function() {
    var writer = new jspb.BinaryWriter();
    writer.writeBytes(1, new Uint8Array([127]));
    assertEquals('CgF/', writer.getResultBase64String());
    assertEquals('CgF/', writer.getResultBase64String(false));
    assertEquals('CgF_', writer.getResultBase64String(true));
  });

  it('writes split 64 fields', function() {
    var writer = new jspb.BinaryWriter();
    writer.writeSplitVarint64(1, 0x1, 0x2);
    writer.writeSplitVarint64(1, 0xFFFFFFFF, 0xFFFFFFFF);
    writer.writeSplitFixed64(2, 0x1, 0x2);
    writer.writeSplitFixed64(2, 0xFFFFFFF0, 0xFFFFFFFF);
    function lo(i) {
      return i + 1;
    }
    function hi(i) {
      return i + 2;
    }
    writer.writeRepeatedSplitVarint64(3, [0, 1, 2], lo, hi);
    writer.writeRepeatedSplitFixed64(4, [0, 1, 2], lo, hi);
    writer.writePackedSplitVarint64(5, [0, 1, 2], lo, hi);
    writer.writePackedSplitFixed64(6, [0, 1, 2], lo, hi);

    function bitsAsArray(lowBits, highBits) {
      return [lowBits >>> 0, highBits >>> 0];
    }
    var reader = jspb.BinaryReader.alloc(writer.getResultBuffer());
    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(1);
    expect(reader.readSplitVarint64(bitsAsArray)).toEqual([0x1, 0x2]);

    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(1);
    expect(reader.readSplitVarint64(bitsAsArray)).toEqual([
      0xFFFFFFFF, 0xFFFFFFFF
    ]);

    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(2);
    expect(reader.readSplitFixed64(bitsAsArray)).toEqual([0x1, 0x2]);

    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(2);
    expect(reader.readSplitFixed64(bitsAsArray)).toEqual([
      0xFFFFFFF0, 0xFFFFFFFF
    ]);

    for (let i = 0; i < 3; i++) {
      reader.nextField();
      expect(reader.getFieldNumber()).toEqual(3);
      expect(reader.readSplitVarint64(bitsAsArray)).toEqual([i + 1, i + 2]);
    }

    for (let i = 0; i < 3; i++) {
      reader.nextField();
      expect(reader.getFieldNumber()).toEqual(4);
      expect(reader.readSplitFixed64(bitsAsArray)).toEqual([i + 1, i + 2]);
    }

    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(5);
    expect(reader.readPackedInt64String()).toEqual([
      String(2 * 2 ** 32 + 1),
      String(3 * 2 ** 32 + 2),
      String(4 * 2 ** 32 + 3),
    ]);

    reader.nextField();
    expect(reader.getFieldNumber()).toEqual(6);
    expect(reader.readPackedFixed64String()).toEqual([
      String(2 * 2 ** 32 + 1),
      String(3 * 2 ** 32 + 2),
      String(4 * 2 ** 32 + 3),
    ]);
  });
});