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Diffstat (limited to 'csharp/ProtocolBuffers.Test/CodedOutputStreamTest.cs')
| -rw-r--r-- | csharp/ProtocolBuffers.Test/CodedOutputStreamTest.cs | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/csharp/ProtocolBuffers.Test/CodedOutputStreamTest.cs b/csharp/ProtocolBuffers.Test/CodedOutputStreamTest.cs new file mode 100644 index 00000000..c2042d9e --- /dev/null +++ b/csharp/ProtocolBuffers.Test/CodedOutputStreamTest.cs @@ -0,0 +1,237 @@ +using NUnit.Framework; +using System.IO; + +namespace Google.ProtocolBuffers { + [TestFixture] + public class CodedOutputStreamTest { + + /// <summary> + /// Helper to construct a byte array from a bunch of bytes. The inputs are + /// actually ints so that I can use hex notation and not get stupid errors + /// about precision. + /// </summary> + private static byte[] Bytes(params int[] bytesAsInts) { + byte[] bytes = new byte[bytesAsInts.Length]; + for (int i = 0; i < bytesAsInts.Length; i++) { + bytes[i] = (byte) bytesAsInts[i]; + } + return bytes; + } + + /// <summary> + /// Writes the given value using WriteRawVarint32() and WriteRawVarint64() and + /// checks that the result matches the given bytes + /// </summary> + private static void AssertWriteVarint(byte[] data, ulong value) { + // Only do 32-bit write if the value fits in 32 bits. + if ((value >> 32) == 0) { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); + output.WriteRawVarint32((uint) value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + // Also try computing size. + Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint32Size((uint) value)); + } + + { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); + output.WriteRawVarint64(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + + // Also try computing size. + Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint64Size(value)); + } + + // Try different buffer sizes. + for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2) { + // Only do 32-bit write if the value fits in 32 bits. + if ((value >> 32) == 0) { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = + CodedOutputStream.CreateInstance(rawOutput, bufferSize); + output.WriteRawVarint32((uint) value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + } + + { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput, bufferSize); + output.WriteRawVarint64(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + } + } + } + + /// <summary> + /// Tests WriteRawVarint32() and WriteRawVarint64() + /// </summary> + [Test] + public void WriteVarint() { + AssertWriteVarint(Bytes(0x00), 0); + AssertWriteVarint(Bytes(0x01), 1); + AssertWriteVarint(Bytes(0x7f), 127); + // 14882 + AssertWriteVarint(Bytes(0xa2, 0x74), (0x22 << 0) | (0x74 << 7)); + // 2961488830 + AssertWriteVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x0b), + (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) | + (0x0bL << 28)); + + // 64-bit + // 7256456126 + AssertWriteVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x1b), + (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) | + (0x1bL << 28)); + // 41256202580718336 + AssertWriteVarint( + Bytes(0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49), + (0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) | + (0x43L << 28) | (0x49L << 35) | (0x24L << 42) | (0x49L << 49)); + // 11964378330978735131 + AssertWriteVarint( + Bytes(0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01), + unchecked((ulong) + ((0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) | + (0x3bL << 28) | (0x56L << 35) | (0x00L << 42) | + (0x05L << 49) | (0x26L << 56) | (0x01L << 63)))); + } + + /// <summary> + /// Parses the given bytes using WriteRawLittleEndian32() and checks + /// that the result matches the given value. + /// </summary> + private static void AssertWriteLittleEndian32(byte[] data, int value) { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); + output.WriteRawLittleEndian32(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + + // Try different buffer sizes. + for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2) { + rawOutput = new MemoryStream(); + output = CodedOutputStream.CreateInstance(rawOutput, bufferSize); + output.WriteRawLittleEndian32(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + } + } + + /// <summary> + /// Parses the given bytes using WriteRawLittleEndian64() and checks + /// that the result matches the given value. + /// </summary> + private static void AssertWriteLittleEndian64(byte[] data, long value) { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); + output.WriteRawLittleEndian64(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + + // Try different block sizes. + for (int blockSize = 1; blockSize <= 16; blockSize *= 2) { + rawOutput = new MemoryStream(); + output = CodedOutputStream.CreateInstance(rawOutput, blockSize); + output.WriteRawLittleEndian64(value); + output.Flush(); + Assert.AreEqual(data, rawOutput.ToArray()); + } + } + + /// <summary> + /// Tests writeRawLittleEndian32() and writeRawLittleEndian64(). + /// </summary> + [Test] + public void WriteLittleEndian() { + AssertWriteLittleEndian32(Bytes(0x78, 0x56, 0x34, 0x12), 0x12345678); + AssertWriteLittleEndian32(Bytes(0xf0, 0xde, 0xbc, 0x9a), unchecked((int)0x9abcdef0)); + + AssertWriteLittleEndian64( + Bytes(0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12), + 0x123456789abcdef0L); + AssertWriteLittleEndian64( + Bytes(0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a), + unchecked((long)0x9abcdef012345678L)); + } + + /* TODO(jonskeet): Put this back when we've got the rest working! + [Test] + public void testWriteWholeMessage() throws Exception { + TestAllTypes message = TestUtil.getAllSet(); + + byte[] rawBytes = message.toByteArray(); + assertEqualBytes(TestUtil.getGoldenMessage().toByteArray(), rawBytes); + + // Try different block sizes. + for (int blockSize = 1; blockSize < 256; blockSize *= 2) { + MemoryStream rawOutput = new MemoryStream(); + CodedOutputStream output = + CodedOutputStream.newInstance(rawOutput, blockSize); + message.writeTo(output); + output.flush(); + assertEqualBytes(rawBytes, rawOutput.toByteArray()); + } + } */ + + + [Test] + public void EncodeZigZag32() { + Assert.AreEqual(0, CodedOutputStream.EncodeZigZag32( 0)); + Assert.AreEqual(1, CodedOutputStream.EncodeZigZag32(-1)); + Assert.AreEqual(2, CodedOutputStream.EncodeZigZag32( 1)); + Assert.AreEqual(3, CodedOutputStream.EncodeZigZag32(-2)); + Assert.AreEqual(0x7FFFFFFE, CodedOutputStream.EncodeZigZag32(0x3FFFFFFF)); + Assert.AreEqual(0x7FFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0xC0000000))); + Assert.AreEqual(0xFFFFFFFE, CodedOutputStream.EncodeZigZag32(0x7FFFFFFF)); + Assert.AreEqual(0xFFFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0x80000000))); + } + + [Test] + public void EncodeZigZag64() { + Assert.AreEqual(0, CodedOutputStream.EncodeZigZag64( 0)); + Assert.AreEqual(1, CodedOutputStream.EncodeZigZag64(-1)); + Assert.AreEqual(2, CodedOutputStream.EncodeZigZag64( 1)); + Assert.AreEqual(3, CodedOutputStream.EncodeZigZag64(-2)); + Assert.AreEqual(0x000000007FFFFFFEL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000003FFFFFFFUL))); + Assert.AreEqual(0x000000007FFFFFFFL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFFC0000000UL))); + Assert.AreEqual(0x00000000FFFFFFFEL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000007FFFFFFFUL))); + Assert.AreEqual(0x00000000FFFFFFFFL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFF80000000UL))); + Assert.AreEqual(0xFFFFFFFFFFFFFFFEL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0x7FFFFFFFFFFFFFFFUL))); + Assert.AreEqual(0xFFFFFFFFFFFFFFFFL, + CodedOutputStream.EncodeZigZag64(unchecked((long)0x8000000000000000UL))); + } + + [Test] + public void RoundTripZigZag32() { + // Some easier-to-verify round-trip tests. The inputs (other than 0, 1, -1) + // were chosen semi-randomly via keyboard bashing. + Assert.AreEqual(0, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(0))); + Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(1))); + Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-1))); + Assert.AreEqual(14927, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(14927))); + Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-3612))); + } + + [Test] + public void RoundTripZigZag64() { + Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(0))); + Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(1))); + Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-1))); + Assert.AreEqual(14927, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(14927))); + Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-3612))); + + Assert.AreEqual(856912304801416L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(856912304801416L))); + Assert.AreEqual(-75123905439571256L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-75123905439571256L))); + } + } +} |