2016-12-28 00:03:46 +00:00
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//
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// CRCTests.m
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// Clock Signal
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//
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// Created by Thomas Harte on 27/12/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#include "CRC.hpp"
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@interface CRCTests : XCTestCase
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@end
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@implementation CRCTests
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- (NumberTheory::CRC16)mfmCRCGenerator
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{
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return NumberTheory::CRC16(0x1021, 0xffff);
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}
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- (uint16_t)crcOfData:(uint8_t *)data length:(size_t)length generator:(NumberTheory::CRC16 &)generator
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{
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generator.reset();
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2016-12-28 23:29:37 +00:00
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for(size_t c = 0; c < length; c++)
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generator.add(data[c]);
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2016-12-28 00:03:46 +00:00
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return generator.get_value();
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}
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- (void)testIDMark
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{
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uint8_t IDMark[] =
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{
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0xa1, 0xa1, 0xa1, 0xfe, 0x00, 0x00, 0x01, 0x01
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};
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uint16_t crc = 0xfa0c;
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NumberTheory::CRC16 crcGenerator = self.mfmCRCGenerator;
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uint16_t computedCRC = [self crcOfData:IDMark length:sizeof(IDMark) generator:crcGenerator];
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XCTAssert(computedCRC == crc, @"Calculated CRC should have been %04x, was %04x", crc, computedCRC);
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}
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- (void)testData
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{
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uint8_t sectorData[] =
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{
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0xa1, 0xa1, 0xa1, 0xfb, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x53, 0x45, 0x44, 0x4f,
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0x52, 0x49, 0x43, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x53, 0x45, 0x44, 0x4f, 0x52, 0x49, 0x43, 0x20, 0x56, 0x31, 0x2e, 0x30,
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0x30, 0x36, 0x20, 0x30, 0x31, 0x2f, 0x30, 0x31, 0x2f, 0x38, 0x36, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20
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};
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uint16_t crc = 0x4de7;
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NumberTheory::CRC16 crcGenerator = self.mfmCRCGenerator;
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uint16_t computedCRC = [self crcOfData:sectorData length:sizeof(sectorData) generator:crcGenerator];
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XCTAssert(computedCRC == crc, @"Calculated CRC should have been %04x, was %04x", crc, computedCRC);
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}
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@end
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