318 lines
11 KiB
JavaScript
318 lines
11 KiB
JavaScript
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/**
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* @fileoverview Test cases for jspb's binary protocol buffer decoder.
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*
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* There are two particular magic numbers that need to be pointed out -
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* 2^64-1025 is the largest number representable as both a double and an
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* unsigned 64-bit integer, and 2^63-513 is the largest number representable as
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* both a double and a signed 64-bit integer.
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*
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* Test suite is written using Jasmine -- see http://jasmine.github.io/
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*
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* @author aappleby@google.com (Austin Appleby)
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*/
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goog.require('goog.testing.asserts');
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goog.require('jspb.BinaryConstants');
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goog.require('jspb.BinaryDecoder');
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goog.require('jspb.BinaryEncoder');
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/**
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* Tests encoding and decoding of unsigned types.
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* @param {Function} readValue
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* @param {Function} writeValue
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* @param {number} epsilon
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* @param {number} upperLimit
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* @param {Function} filter
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* @suppress {missingProperties|visibility}
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*/
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function doTestUnsignedValue(readValue,
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writeValue, epsilon, upperLimit, filter) {
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var encoder = new jspb.BinaryEncoder();
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// Encode zero and limits.
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writeValue.call(encoder, filter(0));
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writeValue.call(encoder, filter(epsilon));
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writeValue.call(encoder, filter(upperLimit));
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// Encode positive values.
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for (var cursor = epsilon; cursor < upperLimit; cursor *= 1.1) {
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writeValue.call(encoder, filter(cursor));
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}
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var decoder = jspb.BinaryDecoder.alloc(encoder.end());
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// Check zero and limits.
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assertEquals(filter(0), readValue.call(decoder));
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assertEquals(filter(epsilon), readValue.call(decoder));
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assertEquals(filter(upperLimit), readValue.call(decoder));
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// Check positive values.
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for (var cursor = epsilon; cursor < upperLimit; cursor *= 1.1) {
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if (filter(cursor) != readValue.call(decoder)) throw 'fail!';
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}
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// Encoding values outside the valid range should assert.
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assertThrows(function() {writeValue.call(encoder, -1);});
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assertThrows(function() {writeValue.call(encoder, upperLimit * 1.1);});
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}
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/**
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* Tests encoding and decoding of signed types.
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* @param {Function} readValue
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* @param {Function} writeValue
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* @param {number} epsilon
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* @param {number} lowerLimit
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* @param {number} upperLimit
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* @param {Function} filter
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* @suppress {missingProperties}
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*/
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function doTestSignedValue(readValue,
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writeValue, epsilon, lowerLimit, upperLimit, filter) {
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var encoder = new jspb.BinaryEncoder();
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// Encode zero and limits.
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writeValue.call(encoder, filter(lowerLimit));
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writeValue.call(encoder, filter(-epsilon));
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writeValue.call(encoder, filter(0));
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writeValue.call(encoder, filter(epsilon));
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writeValue.call(encoder, filter(upperLimit));
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var inputValues = [];
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// Encode negative values.
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for (var cursor = lowerLimit; cursor < -epsilon; cursor /= 1.1) {
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var val = filter(cursor);
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writeValue.call(encoder, val);
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inputValues.push(val);
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}
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// Encode positive values.
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for (var cursor = epsilon; cursor < upperLimit; cursor *= 1.1) {
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var val = filter(cursor);
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writeValue.call(encoder, val);
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inputValues.push(val);
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}
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var decoder = jspb.BinaryDecoder.alloc(encoder.end());
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// Check zero and limits.
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assertEquals(filter(lowerLimit), readValue.call(decoder));
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assertEquals(filter(-epsilon), readValue.call(decoder));
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assertEquals(filter(0), readValue.call(decoder));
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assertEquals(filter(epsilon), readValue.call(decoder));
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assertEquals(filter(upperLimit), readValue.call(decoder));
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// Verify decoded values.
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for (var i = 0; i < inputValues.length; i++) {
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assertEquals(inputValues[i], readValue.call(decoder));
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}
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// Encoding values outside the valid range should assert.
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assertThrows(function() {writeValue.call(encoder, lowerLimit * 1.1);});
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assertThrows(function() {writeValue.call(encoder, upperLimit * 1.1);});
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}
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describe('binaryDecoderTest', function() {
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/**
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* Tests the decoder instance cache.
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*/
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it('testInstanceCache', /** @suppress {visibility} */ function() {
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// Empty the instance caches.
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jspb.BinaryDecoder.instanceCache_ = [];
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// Allocating and then freeing a decoder should put it in the instance
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// cache.
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jspb.BinaryDecoder.alloc().free();
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assertEquals(1, jspb.BinaryDecoder.instanceCache_.length);
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// Allocating and then freeing three decoders should leave us with three in
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// the cache.
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var decoder1 = jspb.BinaryDecoder.alloc();
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var decoder2 = jspb.BinaryDecoder.alloc();
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var decoder3 = jspb.BinaryDecoder.alloc();
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decoder1.free();
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decoder2.free();
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decoder3.free();
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assertEquals(3, jspb.BinaryDecoder.instanceCache_.length);
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});
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/**
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* Tests reading 64-bit integers as hash strings.
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*/
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it('testHashStrings', function() {
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var encoder = new jspb.BinaryEncoder();
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var hashA = String.fromCharCode(0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00);
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var hashB = String.fromCharCode(0x12, 0x34, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00);
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var hashC = String.fromCharCode(0x12, 0x34, 0x56, 0x78,
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0x87, 0x65, 0x43, 0x21);
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var hashD = String.fromCharCode(0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF);
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encoder.writeVarintHash64(hashA);
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encoder.writeVarintHash64(hashB);
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encoder.writeVarintHash64(hashC);
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encoder.writeVarintHash64(hashD);
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encoder.writeFixedHash64(hashA);
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encoder.writeFixedHash64(hashB);
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encoder.writeFixedHash64(hashC);
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encoder.writeFixedHash64(hashD);
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var decoder = jspb.BinaryDecoder.alloc(encoder.end());
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assertEquals(hashA, decoder.readVarintHash64());
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assertEquals(hashB, decoder.readVarintHash64());
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assertEquals(hashC, decoder.readVarintHash64());
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assertEquals(hashD, decoder.readVarintHash64());
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assertEquals(hashA, decoder.readFixedHash64());
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assertEquals(hashB, decoder.readFixedHash64());
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assertEquals(hashC, decoder.readFixedHash64());
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assertEquals(hashD, decoder.readFixedHash64());
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});
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/**
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* Verifies that misuse of the decoder class triggers assertions.
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* @suppress {checkTypes|visibility}
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*/
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it('testDecodeErrors', function() {
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// Reading a value past the end of the stream should trigger an assertion.
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var decoder = jspb.BinaryDecoder.alloc([0, 1, 2]);
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assertThrows(function() {decoder.readUint64()});
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// Overlong varints should trigger assertions.
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decoder.setBlock([255, 255, 255, 255, 255, 255,
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255, 255, 255, 255, 255, 0]);
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assertThrows(function() {decoder.readUnsignedVarint64()});
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decoder.reset();
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assertThrows(function() {decoder.readSignedVarint64()});
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decoder.reset();
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assertThrows(function() {decoder.readZigzagVarint64()});
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decoder.reset();
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assertThrows(function() {decoder.readUnsignedVarint32()});
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});
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/**
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* Tests encoding and decoding of unsigned integers.
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*/
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it('testUnsignedIntegers', function() {
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doTestUnsignedValue(
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jspb.BinaryDecoder.prototype.readUint8,
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jspb.BinaryEncoder.prototype.writeUint8,
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1, 0xFF, Math.round);
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doTestUnsignedValue(
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jspb.BinaryDecoder.prototype.readUint16,
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jspb.BinaryEncoder.prototype.writeUint16,
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1, 0xFFFF, Math.round);
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doTestUnsignedValue(
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jspb.BinaryDecoder.prototype.readUint32,
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jspb.BinaryEncoder.prototype.writeUint32,
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1, 0xFFFFFFFF, Math.round);
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doTestUnsignedValue(
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jspb.BinaryDecoder.prototype.readUint64,
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jspb.BinaryEncoder.prototype.writeUint64,
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1, Math.pow(2, 64) - 1025, Math.round);
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});
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/**
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* Tests encoding and decoding of signed integers.
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*/
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it('testSignedIntegers', function() {
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readInt8,
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jspb.BinaryEncoder.prototype.writeInt8,
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1, -0x80, 0x7F, Math.round);
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readInt16,
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jspb.BinaryEncoder.prototype.writeInt16,
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1, -0x8000, 0x7FFF, Math.round);
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readInt32,
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jspb.BinaryEncoder.prototype.writeInt32,
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1, -0x80000000, 0x7FFFFFFF, Math.round);
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readInt64,
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jspb.BinaryEncoder.prototype.writeInt64,
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1, -Math.pow(2, 63), Math.pow(2, 63) - 513, Math.round);
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});
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/**
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* Tests encoding and decoding of floats.
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*/
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it('testFloats', function() {
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/**
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* @param {number} x
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* @return {number}
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*/
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function truncate(x) {
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var temp = new Float32Array(1);
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temp[0] = x;
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return temp[0];
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}
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readFloat,
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jspb.BinaryEncoder.prototype.writeFloat,
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jspb.BinaryConstants.FLOAT32_EPS,
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-jspb.BinaryConstants.FLOAT32_MAX,
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jspb.BinaryConstants.FLOAT32_MAX,
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truncate);
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doTestSignedValue(
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jspb.BinaryDecoder.prototype.readDouble,
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jspb.BinaryEncoder.prototype.writeDouble,
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jspb.BinaryConstants.FLOAT64_EPS * 10,
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-jspb.BinaryConstants.FLOAT64_MAX,
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jspb.BinaryConstants.FLOAT64_MAX,
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function(x) { return x; });
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});
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});
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