binary/writer_test.js - external/github.com/protocolbuffers/protobuf-javascript - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://protobuf.dev/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 /**
  * @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('jspb.BinaryConstants');
 goog.require('jspb.BinaryReader');
 goog.require('jspb.binary.test_utils');
 goog.require('jspb.BinaryWriter');
 goog.require('jspb.bytestring');
 goog.require('jspb.utils');
 goog.require('goog.crypt');
 goog.require('goog.crypt.base64');

 const BinaryMessage = goog.module.get('jspb.BinaryConstants').BinaryMessage;
 const BinaryReader = goog.module.get('jspb.BinaryReader');
 const BinaryWriter = goog.module.get('jspb.BinaryWriter');
 const ByteString = goog.module.get('jspb.bytestring').ByteString;
 const FLOAT32_MAX = goog.module.get('jspb.BinaryConstants').FLOAT32_MAX;
 const FLOAT32_MIN = goog.module.get('jspb.BinaryConstants').FLOAT32_MIN;
 const base64 = goog.module.get('goog.crypt.base64');
 const byteArrayToHex = goog.module.get('goog.crypt').byteArrayToHex;
 const byteSourceToUint8Array = goog.module.get('jspb.utils').byteSourceToUint8Array;
 const getSplit64High = goog.module.get('jspb.utils').getSplit64High;
 const getSplit64Low = goog.module.get('jspb.utils').getSplit64Low;
 const splitDecimalString = goog.module.get('jspb.utils').splitDecimalString;
 const toHexFields = goog.module.get('jspb.binary.test_utils').toHexFields;

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

     expect(() => {
       writer.writeMessage(-1, dummyMessage, goog.nullFunction);
     }).toThrowError();

     // Writing invalid field indices should assert.
     writer = new BinaryWriter();
     expect(() => {
       writer.writeUint64(-1, 1);
     }).toThrowError();

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

     expect(() => {
       writer.writeInt32(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeInt32(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeInt64(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeInt64(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeUint32(1, -1);
     }).toThrowError();
     expect(() => {
       writer.writeUint32(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeUint64(1, -1);
     }).toThrowError();
     expect(() => {
       writer.writeUint64(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeSint32(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeSint32(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeSint64(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeSint64(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeFixed32(1, -1);
     }).toThrowError();
     expect(() => {
       writer.writeFixed32(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeFixed64(1, -1);
     }).toThrowError();
     expect(() => {
       writer.writeFixed64(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeSfixed32(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeSfixed32(1, Infinity);
     }).toThrowError();

     expect(() => {
       writer.writeSfixed64(1, -Infinity);
     }).toThrowError();
     expect(() => {
       writer.writeSfixed64(1, Infinity);
     }).toThrowError();
   });


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

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

     const buffer = writer.getResultBuffer();
     expect(byteArrayToHex(buffer)).toEqual(expected);
   });


   /**
    * Tests websafe encodings for base64 strings.
    */
   it('testWebSafeOption', () => {
     const writer = new BinaryWriter();
     writer.writeBytes(1, new Uint8Array([127]));
     expect(writer.getResultBase64String()).toEqual('CgF/');
     expect(writer.getResultBase64String(base64.Alphabet.DEFAULT))
         .toEqual('CgF/');
     expect(writer.getResultBase64String(base64.Alphabet.WEBSAFE_NO_PADDING))
         .toEqual('CgF_');
   });

   it('writes split 64 fields', () => {
     const writer = new 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);

     const reader = 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);
     const a = [];
     expect((reader.readPackableInt64StringInto(a), a)).toEqual([
       String(2 * 2 ** 32 + 1),
       String(3 * 2 ** 32 + 2),
       String(4 * 2 ** 32 + 3),
     ]);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(6);
     expect((a.length = 0, reader.readPackableFixed64StringInto(a), a)).toEqual([
       String(2 * 2 ** 32 + 1),
       String(3 * 2 ** 32 + 2),
       String(4 * 2 ** 32 + 3),
     ]);
   });

   it('writes packed 64bit string fields', () => {
     const MAX_UINT64 = '18446744073709551615';  // 0xFFFFFFFFFFFFFFFF
     const MAX_INT64 = '9223372036854775807';    // 0x7FFFFFFFFFFFFFFF
     const MIN_INT64 = '-9223372036854775808';   // 0x8000000000000000
     const signedValues = ['0', '-1', MAX_INT64, MIN_INT64];
     const unsignedValues = ['0', '1', MAX_UINT64];
     const writer = new BinaryWriter();
     writer.writePackedSfixed64String(1, signedValues);
     writer.writePackedInt64String(2, signedValues);
     writer.writePackedSint64String(3, signedValues);

     writer.writePackedFixed64String(4, unsignedValues);
     writer.writePackedUint64String(5, unsignedValues);

     const resultBuffer = writer.getResultBuffer();
     expect(toHexFields(resultBuffer)).toEqual({
       1: '0a20' +
           '0000000000000000' +  // 0
           'ffffffffffffffff' +  // -1
           'ffffffffffffff7f' +  // MAX_INT64
           '0000000000000080',   // MIN_INT64
       2: '121e' +
           '00' +                    // 0
           'ffffffffffffffffff01' +  // -1
           'ffffffffffffffff7f' +    // MAX_INT64
           '80808080808080808001',   // MIN_INT64
       3: '1a16' +
           '00' +                    // 0
           '01' +                    // -1
           'feffffffffffffffff01' +  // MAX_INT64
           'ffffffffffffffffff01',   // MIN_INT64
       4: '2218' +
           '0000000000000000' +  // 0
           '0100000000000000' +  // 1
           'ffffffffffffffff',   // MAX_UINT64
       5: '2a0c' +
           '00' +                   // 0
           '01' +                   // 1
           'ffffffffffffffffff01',  // MAX_UINT64
     });
     const reader = BinaryReader.alloc(resultBuffer);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(1);
     const /** !Array<string> */ results1 = [];
     reader.readPackableSfixed64StringInto(results1);
     expect(results1).toEqual(signedValues);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(2);
     const /** !Array<string> */ results2 = [];
     reader.readPackableInt64StringInto(results2);
     expect(results2).toEqual(signedValues);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(3);
     const /** !Array<string> */ results3 = [];
     reader.readPackableSint64StringInto(results3);
     expect(results3).toEqual(signedValues);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(4);
     const /** !Array<string> */ results4 = [];
     reader.readPackableFixed64StringInto(results4);
     expect(results4).toEqual(unsignedValues);

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(5);
     const /** !Array<string> */ results5 = [];
     reader.readPackableUint64StringInto(results5);
     expect(results5).toEqual(unsignedValues);
   });

   it('writes zigzag 64 fields', () => {
     // Test cases direcly from the protobuf dev guide.
     // https://engdoc.corp.google.com/eng/howto/protocolbuffers/developerguide/encoding.shtml?cl=head#types
     const testCases = [
       {original: '0', zigzag: '0'},
       {original: '-1', zigzag: '1'},
       {original: '1', zigzag: '2'},
       {original: '-2', zigzag: '3'},
       {original: '2147483647', zigzag: '4294967294'},
       {original: '-2147483648', zigzag: '4294967295'},
       // 64-bit extremes, not in dev guide.
       {original: '9223372036854775807', zigzag: '18446744073709551614'},
       {original: '-9223372036854775808', zigzag: '18446744073709551615'},
     ];
     function decimalToLowBits(v) {
       splitDecimalString(v);
       return getSplit64Low() >>> 0;
     }
     function decimalToHighBits(v) {
       splitDecimalString(v);
       return getSplit64High() >>> 0;
     }

     const writer = new BinaryWriter();
     testCases.forEach(c => {
       writer.writeSint64String(1, c.original);
       splitDecimalString(c.original);
       writer.writeSplitZigzagVarint64(1, getSplit64Low(), getSplit64High());
     });

     writer.writeRepeatedSint64String(2, testCases.map(c => c.original));

     writer.writeRepeatedSplitZigzagVarint64(
         4, testCases.map(c => c.original), decimalToLowBits, decimalToHighBits);

     writer.writePackedSint64String(5, testCases.map(c => c.original));

     writer.writePackedSplitZigzagVarint64(
         7, testCases.map(c => c.original), decimalToLowBits, decimalToHighBits);

     // Verify by reading the stream as normal int64 fields and checking with
     // the canonical zigzag encoding of each value.
     const reader = BinaryReader.alloc(writer.getResultBuffer());
     testCases.forEach(c => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(1);
       expect(reader.readUint64String()).toEqual(c.zigzag);
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(1);
       expect(reader.readUint64String()).toEqual(c.zigzag);
     });

     testCases.forEach(c => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(2);
       expect(reader.readUint64String()).toEqual(c.zigzag);
     });

     testCases.forEach(c => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(4);
       expect(reader.readUint64String()).toEqual(c.zigzag);
     });

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(5);
     const a = [];
     expect((reader.readPackableUint64StringInto(a), a))
         .toEqual(testCases.map(c => c.zigzag));

     reader.nextField();
     expect(reader.getFieldNumber()).toEqual(7);
     expect((a.length = 0, reader.readPackableUint64StringInto(a), a))
         .toEqual(testCases.map(c => c.zigzag));
   });

   it('writes float32 fields', () => {
     const testCases = [
       0,
       1,
       -1,
       FLOAT32_MIN,
       -FLOAT32_MIN,
       FLOAT32_MAX,
       -FLOAT32_MAX,
       3.1415927410125732,
       Infinity,
       -Infinity,
       NaN,
     ];
     const writer = new BinaryWriter();
     testCases.forEach(f => {
       writer.writeFloat(1, f);
     });
     const reader = BinaryReader.alloc(writer.getResultBuffer());
     testCases.forEach(f => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(1);
       if (isNaN(f)) {
         expect(isNaN(reader.readFloat())).toEqual(true);
       } else {
         expect(reader.readFloat()).toEqual(f);
       }
     });
   });

   it('writes double fields', () => {
     const testCases = [
       0,
       1,
       -1,
       Number.MAX_SAFE_INTEGER,
       Number.MIN_SAFE_INTEGER,
       Number.MAX_VALUE,
       Number.MIN_VALUE,
       FLOAT32_MIN,
       -FLOAT32_MIN,
       FLOAT32_MAX,
       -FLOAT32_MAX,
       Math.PI,
       Infinity,
       -Infinity,
       NaN,
     ];
     const writer = new BinaryWriter();
     testCases.forEach(f => {
       writer.writeDouble(1, f);
     });
     const reader = BinaryReader.alloc(writer.getResultBuffer());
     testCases.forEach(f => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(1);
       if (isNaN(f)) {
         expect(isNaN(reader.readDouble())).toEqual(true);
       } else {
         expect(reader.readDouble()).toEqual(f);
       }
     });
   });

   it('writes binary fields', () => {
     const testCases = [
       new Uint8Array([1, 2, 3]),
       // Test that we don't stackoverflow with large blocks.
       new Uint8Array(new Array(1000000).fill(1)),
       '1234',
       ByteString.fromBase64('5678'),
       ByteString.fromUint8Array(new Uint8Array([9, 10])),
     ];
     const writer = new BinaryWriter();
     testCases.forEach((f) => {
       writer.writeBytes(1, f);
     });
     const reader = BinaryReader.alloc(writer.getResultBuffer());
     testCases.forEach(f => {
       reader.nextField();
       expect(reader.getFieldNumber()).toEqual(1);
       expect(reader.readBytes()).toEqual(byteSourceToUint8Array(f));
     });
   });
 });

 /**
  * @param {number} lowBits
  * @param {number} highBits
  * @return {!Array<number>}
  */
 function bitsAsArray(lowBits, highBits) {
   return [lowBits >>> 0, highBits >>> 0];
 }
	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	// https://protobuf.dev/
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	/**
	* @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('jspb.BinaryConstants');
	goog.require('jspb.BinaryReader');
	goog.require('jspb.binary.test_utils');
	goog.require('jspb.BinaryWriter');
	goog.require('jspb.bytestring');
	goog.require('jspb.utils');
	goog.require('goog.crypt');
	goog.require('goog.crypt.base64');

	const BinaryMessage = goog.module.get('jspb.BinaryConstants').BinaryMessage;
	const BinaryReader = goog.module.get('jspb.BinaryReader');
	const BinaryWriter = goog.module.get('jspb.BinaryWriter');
	const ByteString = goog.module.get('jspb.bytestring').ByteString;
	const FLOAT32_MAX = goog.module.get('jspb.BinaryConstants').FLOAT32_MAX;
	const FLOAT32_MIN = goog.module.get('jspb.BinaryConstants').FLOAT32_MIN;
	const base64 = goog.module.get('goog.crypt.base64');
	const byteArrayToHex = goog.module.get('goog.crypt').byteArrayToHex;
	const byteSourceToUint8Array = goog.module.get('jspb.utils').byteSourceToUint8Array;
	const getSplit64High = goog.module.get('jspb.utils').getSplit64High;
	const getSplit64Low = goog.module.get('jspb.utils').getSplit64Low;
	const splitDecimalString = goog.module.get('jspb.utils').splitDecimalString;
	const toHexFields = goog.module.get('jspb.binary.test_utils').toHexFields;

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

	expect(() => {
	writer.writeMessage(-1, dummyMessage, goog.nullFunction);
	}).toThrowError();

	// Writing invalid field indices should assert.
	writer = new BinaryWriter();
	expect(() => {
	writer.writeUint64(-1, 1);
	}).toThrowError();

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

	expect(() => {
	writer.writeInt32(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeInt32(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeInt64(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeInt64(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeUint32(1, -1);
	}).toThrowError();
	expect(() => {
	writer.writeUint32(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeUint64(1, -1);
	}).toThrowError();
	expect(() => {
	writer.writeUint64(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeSint32(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeSint32(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeSint64(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeSint64(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeFixed32(1, -1);
	}).toThrowError();
	expect(() => {
	writer.writeFixed32(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeFixed64(1, -1);
	}).toThrowError();
	expect(() => {
	writer.writeFixed64(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeSfixed32(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeSfixed32(1, Infinity);
	}).toThrowError();

	expect(() => {
	writer.writeSfixed64(1, -Infinity);
	}).toThrowError();
	expect(() => {
	writer.writeSfixed64(1, Infinity);
	}).toThrowError();
	});


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

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

	const buffer = writer.getResultBuffer();
	expect(byteArrayToHex(buffer)).toEqual(expected);
	});


	/**
	* Tests websafe encodings for base64 strings.
	*/
	it('testWebSafeOption', () => {
	const writer = new BinaryWriter();
	writer.writeBytes(1, new Uint8Array([127]));
	expect(writer.getResultBase64String()).toEqual('CgF/');
	expect(writer.getResultBase64String(base64.Alphabet.DEFAULT))
	.toEqual('CgF/');
	expect(writer.getResultBase64String(base64.Alphabet.WEBSAFE_NO_PADDING))
	.toEqual('CgF_');
	});

	it('writes split 64 fields', () => {
	const writer = new 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);

	const reader = 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);
	const a = [];
	expect((reader.readPackableInt64StringInto(a), a)).toEqual([
	String(2 * 2 ** 32 + 1),
	String(3 * 2 ** 32 + 2),
	String(4 * 2 ** 32 + 3),
	]);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(6);
	expect((a.length = 0, reader.readPackableFixed64StringInto(a), a)).toEqual([
	String(2 * 2 ** 32 + 1),
	String(3 * 2 ** 32 + 2),
	String(4 * 2 ** 32 + 3),
	]);
	});

	it('writes packed 64bit string fields', () => {
	const MAX_UINT64 = '18446744073709551615'; // 0xFFFFFFFFFFFFFFFF
	const MAX_INT64 = '9223372036854775807'; // 0x7FFFFFFFFFFFFFFF
	const MIN_INT64 = '-9223372036854775808'; // 0x8000000000000000
	const signedValues = ['0', '-1', MAX_INT64, MIN_INT64];
	const unsignedValues = ['0', '1', MAX_UINT64];
	const writer = new BinaryWriter();
	writer.writePackedSfixed64String(1, signedValues);
	writer.writePackedInt64String(2, signedValues);
	writer.writePackedSint64String(3, signedValues);

	writer.writePackedFixed64String(4, unsignedValues);
	writer.writePackedUint64String(5, unsignedValues);

	const resultBuffer = writer.getResultBuffer();
	expect(toHexFields(resultBuffer)).toEqual({
	1: '0a20' +
	'0000000000000000' + // 0
	'ffffffffffffffff' + // -1
	'ffffffffffffff7f' + // MAX_INT64
	'0000000000000080', // MIN_INT64
	2: '121e' +
	'00' + // 0
	'ffffffffffffffffff01' + // -1
	'ffffffffffffffff7f' + // MAX_INT64
	'80808080808080808001', // MIN_INT64
	3: '1a16' +
	'00' + // 0
	'01' + // -1
	'feffffffffffffffff01' + // MAX_INT64
	'ffffffffffffffffff01', // MIN_INT64
	4: '2218' +
	'0000000000000000' + // 0
	'0100000000000000' + // 1
	'ffffffffffffffff', // MAX_UINT64
	5: '2a0c' +
	'00' + // 0
	'01' + // 1
	'ffffffffffffffffff01', // MAX_UINT64
	});
	const reader = BinaryReader.alloc(resultBuffer);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	const /** !Array<string> */ results1 = [];
	reader.readPackableSfixed64StringInto(results1);
	expect(results1).toEqual(signedValues);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(2);
	const /** !Array<string> */ results2 = [];
	reader.readPackableInt64StringInto(results2);
	expect(results2).toEqual(signedValues);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(3);
	const /** !Array<string> */ results3 = [];
	reader.readPackableSint64StringInto(results3);
	expect(results3).toEqual(signedValues);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(4);
	const /** !Array<string> */ results4 = [];
	reader.readPackableFixed64StringInto(results4);
	expect(results4).toEqual(unsignedValues);

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(5);
	const /** !Array<string> */ results5 = [];
	reader.readPackableUint64StringInto(results5);
	expect(results5).toEqual(unsignedValues);
	});

	it('writes zigzag 64 fields', () => {
	// Test cases direcly from the protobuf dev guide.
	// https://engdoc.corp.google.com/eng/howto/protocolbuffers/developerguide/encoding.shtml?cl=head#types
	const testCases = [
	{original: '0', zigzag: '0'},
	{original: '-1', zigzag: '1'},
	{original: '1', zigzag: '2'},
	{original: '-2', zigzag: '3'},
	{original: '2147483647', zigzag: '4294967294'},
	{original: '-2147483648', zigzag: '4294967295'},
	// 64-bit extremes, not in dev guide.
	{original: '9223372036854775807', zigzag: '18446744073709551614'},
	{original: '-9223372036854775808', zigzag: '18446744073709551615'},
	];
	function decimalToLowBits(v) {
	splitDecimalString(v);
	return getSplit64Low() >>> 0;
	}
	function decimalToHighBits(v) {
	splitDecimalString(v);
	return getSplit64High() >>> 0;
	}

	const writer = new BinaryWriter();
	testCases.forEach(c => {
	writer.writeSint64String(1, c.original);
	splitDecimalString(c.original);
	writer.writeSplitZigzagVarint64(1, getSplit64Low(), getSplit64High());
	});

	writer.writeRepeatedSint64String(2, testCases.map(c => c.original));

	writer.writeRepeatedSplitZigzagVarint64(
	4, testCases.map(c => c.original), decimalToLowBits, decimalToHighBits);

	writer.writePackedSint64String(5, testCases.map(c => c.original));

	writer.writePackedSplitZigzagVarint64(
	7, testCases.map(c => c.original), decimalToLowBits, decimalToHighBits);

	// Verify by reading the stream as normal int64 fields and checking with
	// the canonical zigzag encoding of each value.
	const reader = BinaryReader.alloc(writer.getResultBuffer());
	testCases.forEach(c => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	expect(reader.readUint64String()).toEqual(c.zigzag);
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	expect(reader.readUint64String()).toEqual(c.zigzag);
	});

	testCases.forEach(c => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(2);
	expect(reader.readUint64String()).toEqual(c.zigzag);
	});

	testCases.forEach(c => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(4);
	expect(reader.readUint64String()).toEqual(c.zigzag);
	});

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(5);
	const a = [];
	expect((reader.readPackableUint64StringInto(a), a))
	.toEqual(testCases.map(c => c.zigzag));

	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(7);
	expect((a.length = 0, reader.readPackableUint64StringInto(a), a))
	.toEqual(testCases.map(c => c.zigzag));
	});

	it('writes float32 fields', () => {
	const testCases = [
	0,
	1,
	-1,
	FLOAT32_MIN,
	-FLOAT32_MIN,
	FLOAT32_MAX,
	-FLOAT32_MAX,
	3.1415927410125732,
	Infinity,
	-Infinity,
	NaN,
	];
	const writer = new BinaryWriter();
	testCases.forEach(f => {
	writer.writeFloat(1, f);
	});
	const reader = BinaryReader.alloc(writer.getResultBuffer());
	testCases.forEach(f => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	if (isNaN(f)) {
	expect(isNaN(reader.readFloat())).toEqual(true);
	} else {
	expect(reader.readFloat()).toEqual(f);
	}
	});
	});

	it('writes double fields', () => {
	const testCases = [
	0,
	1,
	-1,
	Number.MAX_SAFE_INTEGER,
	Number.MIN_SAFE_INTEGER,
	Number.MAX_VALUE,
	Number.MIN_VALUE,
	FLOAT32_MIN,
	-FLOAT32_MIN,
	FLOAT32_MAX,
	-FLOAT32_MAX,
	Math.PI,
	Infinity,
	-Infinity,
	NaN,
	];
	const writer = new BinaryWriter();
	testCases.forEach(f => {
	writer.writeDouble(1, f);
	});
	const reader = BinaryReader.alloc(writer.getResultBuffer());
	testCases.forEach(f => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	if (isNaN(f)) {
	expect(isNaN(reader.readDouble())).toEqual(true);
	} else {
	expect(reader.readDouble()).toEqual(f);
	}
	});
	});

	it('writes binary fields', () => {
	const testCases = [
	new Uint8Array([1, 2, 3]),
	// Test that we don't stackoverflow with large blocks.
	new Uint8Array(new Array(1000000).fill(1)),
	'1234',
	ByteString.fromBase64('5678'),
	ByteString.fromUint8Array(new Uint8Array([9, 10])),
	];
	const writer = new BinaryWriter();
	testCases.forEach((f) => {
	writer.writeBytes(1, f);
	});
	const reader = BinaryReader.alloc(writer.getResultBuffer());
	testCases.forEach(f => {
	reader.nextField();
	expect(reader.getFieldNumber()).toEqual(1);
	expect(reader.readBytes()).toEqual(byteSourceToUint8Array(f));
	});
	});
	});

	/**
	* @param {number} lowBits
	* @param {number} highBits
	* @return {!Array<number>}
	*/
	function bitsAsArray(lowBits, highBits) {
	return [lowBits >>> 0, highBits >>> 0];
	}