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91 lines
3.0 KiB
Plaintext
91 lines
3.0 KiB
Plaintext
//
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// PCMTrackTests.m
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// Clock Signal
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//
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// Created by Thomas Harte on 18/12/2016.
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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 "PCMTrack.hpp"
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@interface PCMTrackTests : XCTestCase
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@end
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@implementation PCMTrackTests
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- (Storage::Disk::PCMTrack)multiSpeedTrack
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{
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Storage::Disk::PCMSegment quickSegment, slowSegment;
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quickSegment.data = {true, true, true, true, true, true, true, true};
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quickSegment.length_of_a_bit.length = 1;
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quickSegment.length_of_a_bit.clock_rate = 100;
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slowSegment.data = {true, true, true, true, true, true, true, true};
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slowSegment.length_of_a_bit.length = 1;
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slowSegment.length_of_a_bit.clock_rate = 3;
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return Storage::Disk::PCMTrack({quickSegment, slowSegment});
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}
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- (void)testMultispeedTrack
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{
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Storage::Disk::PCMTrack track = self.multiSpeedTrack;
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std::vector<Storage::Disk::Track::Event> events;
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Storage::Time total_length;
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do {
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events.push_back(track.get_next_event());
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total_length += events.back().length;
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} while(events.back().type != Storage::Disk::Track::Event::IndexHole);
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XCTAssert(events.size() == 17, "Should have received 17 events; got %lu", events.size());
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total_length.simplify();
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XCTAssert(total_length.length == 1 && total_length.clock_rate == 1, "Events should have summed to a total time of 1; instead got %u/%u", total_length.length, total_length.clock_rate);
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Storage::Time transition_length = events[0].length + events.back().length;
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XCTAssert(events[8].length == transition_length, "Time taken in transition between speed zones should be half of a bit length in the first part plus half of a bit length in the second");
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}
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- (void)testComplicatedTrackSeek {
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std::vector<Storage::Disk::PCMSegment> segments;
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Storage::Disk::PCMSegment sync_segment;
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sync_segment.data.resize(10*8);
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std::fill(sync_segment.data.begin(), sync_segment.data.end(), true);
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Storage::Disk::PCMSegment header_segment;
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header_segment.data.resize(14*8);
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std::fill(header_segment.data.begin(), header_segment.data.end(), true);
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Storage::Disk::PCMSegment data_segment;
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data_segment.data.resize(349*8);
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std::fill(data_segment.data.begin(), data_segment.data.end(), true);
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for(std::size_t c = 0; c < 16; ++c) {
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segments.push_back(sync_segment);
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segments.push_back(header_segment);
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segments.push_back(sync_segment);
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segments.push_back(data_segment);
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segments.push_back(sync_segment);
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}
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Storage::Disk::PCMTrack track(segments);
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const float late_time = 967445.0f / 2045454.0f;
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const auto offset = track.seek_to(late_time);
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XCTAssert(offset <= late_time, "Found location should be at or before sought time");
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const auto difference = late_time - offset;
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XCTAssert(difference >= 0.0 && difference < 0.005, "Next event should occur soon");
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XCTAssert(offset >= 0.0 && offset < 0.5, "Next event should occur soon");
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auto next_event = track.get_next_event();
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double next_event_duration = next_event.length.get<double>();
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XCTAssert(next_event_duration >= 0.0 && next_event_duration < 0.005, "Next event should occur soon");
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}
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@end
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