Started building some tests of the array builder.

OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj

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 				4BC9E1ED1D23449A003FCEE4 /* 6502InterruptTests.swift */,
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 				4BEF6AAA1D35CE9E00E73575 /* DigitalPhaseLockedLoopBridge.mm in Sources */,
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OSBindings/Mac/Clock SignalTests/ArrayBuilderTests.h

@@ -0,0 +1,13 @@
+//
+//  ArrayBuilderTests.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 19/11/2016.
+//  Copyright © 2016 Thomas Harte. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+
+@interface ArrayBuilderTests : XCTestCase
+
+@end

OSBindings/Mac/Clock SignalTests/ArrayBuilderTests.mm

@@ -0,0 +1,83 @@
+//
+//  ArrayBuilderTests.m
+//  Clock Signal
+//
+//  Created by Thomas Harte on 19/11/2016.
+//  Copyright © 2016 Thomas Harte. All rights reserved.
+//
+
+#import "ArrayBuilderTests.h"
+#include "ArrayBuilder.hpp"
+
+static NSData *inputData, *outputData;
+
+static void setData(bool is_input, uint8_t *data, size_t size)
+{
+	NSData *dataObject = [NSData dataWithBytes:data length:size];
+	if(is_input) inputData = dataObject; else outputData = dataObject;
+}
+
+@implementation ArrayBuilderTests
+
++ (void)setUp
+{
+	inputData = nil;
+	outputData = nil;
+}
+
+- (void)assertMonotonicForInputSize:(size_t)inputSize outputSize:(size_t)outputSize
+{
+	XCTAssert(inputData != nil, @"Should have received some input data");
+	XCTAssert(outputData != nil, @"Should have received some output data");
+
+	XCTAssert(inputData.length == inputSize, @"Input data should be 5 bytes long, was %d", inputData.length);
+	XCTAssert(outputData.length == outputSize, @"Output data should be 3 bytes long, was %d", outputData.length);
+
+	uint8_t *input = (uint8_t *)inputData.bytes;
+	uint8_t *output = (uint8_t *)outputData.bytes;
+
+	for(int c = 0; c < inputSize; c++) XCTAssert(input[c] == c, @"Input item %d should be %d, was %d", c, c, input[c]);
+	for(int c = 0; c < outputSize; c++) XCTAssert(output[c] == c + 0x80, @"Output item %d should be %d, was %d", c, c+0x80, output[c]);
+}
+
+- (void)testSingleWriteSingleFlush
+{
+	Outputs::CRT::ArrayBuilder arrayBuilder(200, 100, setData);
+
+	uint8_t *input = arrayBuilder.get_input_storage(5);
+	uint8_t *output = arrayBuilder.get_output_storage(3);
+
+	for(int c = 0; c < 5; c++) input[c] = c;
+	for(int c = 0; c < 3; c++) output[c] = c + 0x80;
+
+	arrayBuilder.flush();
+	arrayBuilder.submit();
+
+	[self assertMonotonicForInputSize:5 outputSize:3];
+}
+
+- (void)testDoubleWriteSingleFlush
+{
+	Outputs::CRT::ArrayBuilder arrayBuilder(200, 100, setData);
+	uint8_t *input;
+	uint8_t *output;
+
+	input = arrayBuilder.get_input_storage(2);
+	output = arrayBuilder.get_output_storage(2);
+
+	for(int c = 0; c < 2; c++) input[c] = c;
+	for(int c = 0; c < 2; c++) output[c] = c + 0x80;
+
+	input = arrayBuilder.get_input_storage(2);
+	output = arrayBuilder.get_output_storage(2);
+
+	for(int c = 0; c < 2; c++) input[c] = c+2;
+	for(int c = 0; c < 2; c++) output[c] = c+2 + 0x80;
+
+	arrayBuilder.flush();
+	arrayBuilder.submit();
+
+	[self assertMonotonicForInputSize:4 outputSize:4];
+}
+
+@end