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CPTDataSourceTestCase.m
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140 lines (106 loc) · 3.73 KB
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#import "CPTDataSourceTestCase.h"
#import "CPTExceptions.h"
#import "CPTMutablePlotRange.h"
#import "CPTScatterPlot.h"
#import "CPTUtilities.h"
static const CGFloat CPTDataSourceTestCasePlotOffset = 0.5;
/// @cond
@interface CPTDataSourceTestCase()
-(nonnull CPTMutablePlotRange *)plotRangeForData:(nonnull CPTNumberArray *)dataArray;
@end
/// @endcond
@implementation CPTDataSourceTestCase
@synthesize xData;
@synthesize yData;
@synthesize nRecords;
@dynamic xRange;
@dynamic yRange;
@synthesize plots;
-(void)setUp
{
// check CPTDataSource conformance
XCTAssertTrue([self conformsToProtocol:@protocol(CPTPlotDataSource)], @"CPTDataSourceTestCase should conform to <CPTPlotDataSource>");
}
-(void)tearDown
{
self.xData = nil;
self.yData = nil;
[self.plots removeAllObjects];
}
-(void)buildData
{
NSUInteger recordCount = self.nRecords;
CPTMutableNumberArray *arr = [NSMutableArray arrayWithCapacity:recordCount];
for ( NSUInteger i = 0; i < recordCount; i++ ) {
[arr insertObject:@(i) atIndex:i];
}
self.xData = arr;
arr = [NSMutableArray arrayWithCapacity:recordCount];
for ( NSUInteger i = 0; i < recordCount; i++ ) {
[arr insertObject:@( sin(2 * M_PI * (double)i / (double)recordCount) ) atIndex:i];
}
self.yData = arr;
}
-(void)addPlot:(nonnull CPTPlot *)newPlot
{
if ( nil == self.plots ) {
self.plots = [NSMutableArray array];
}
[self.plots addObject:newPlot];
}
-(nonnull CPTPlotRange *)xRange
{
[self buildData];
CPTNumberArray *data = self.xData;
return [self plotRangeForData:data];
}
-(nonnull CPTPlotRange *)yRange
{
[self buildData];
CPTNumberArray *data = self.yData;
CPTMutablePlotRange *range = [self plotRangeForData:data];
if ( self.plots.count > 1 ) {
range.lengthDecimal = CPTDecimalAdd( range.lengthDecimal, CPTDecimalFromUnsignedInteger(self.plots.count) );
}
return range;
}
-(nonnull CPTMutablePlotRange *)plotRangeForData:(nonnull CPTNumberArray *)dataArray
{
double min = [[dataArray valueForKeyPath:@"@min.doubleValue"] doubleValue];
double max = [[dataArray valueForKeyPath:@"@max.doubleValue"] doubleValue];
double range = max - min;
return [CPTMutablePlotRange plotRangeWithLocation:@(min - 0.05 * range)
length:@(range + 0.1 * range)];
}
#pragma mark -
#pragma mark Plot Data Source Methods
-(NSUInteger)numberOfRecordsForPlot:(nonnull CPTPlot *)plot
{
return self.nRecords;
}
-(nullable CPTNumberArray *)numbersForPlot:(nonnull CPTPlot *)plot
field:(NSUInteger)fieldEnum
recordIndexRange:(NSRange)indexRange
{
CPTNumberArray *result;
switch ( fieldEnum ) {
case CPTScatterPlotFieldX:
result = [self.xData objectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:indexRange]];
break;
case CPTScatterPlotFieldY:
result = [self.yData objectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:indexRange]];
if ( self.plots.count > 1 ) {
XCTAssertTrue([[self plots] containsObject:plot], @"Plot missing");
CPTMutableNumberArray *shiftedResult = [NSMutableArray arrayWithCapacity:result.count];
for ( NSDecimalNumber *d in result ) {
[shiftedResult addObject:[d decimalNumberByAdding:[NSDecimalNumber decimalNumberWithDecimal:CPTDecimalFromDouble( CPTDataSourceTestCasePlotOffset * ([self.plots indexOfObject:plot] + 1) )]]];
}
result = shiftedResult;
}
break;
default:
[NSException raise:CPTDataException format:@"Unexpected fieldEnum"];
}
return result;
}
@end