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#import <Mapbox/Mapbox.h>
#import <XCTest/XCTest.h>
#import "MGLStyleLayer_Private.h"
#include <mbgl/style/layers/heatmap_layer.hpp>
@interface MGLHeatmapColorTests : XCTestCase <MGLMapViewDelegate>
@end
@implementation MGLHeatmapColorTests
- (void)testProperties {
MGLPointFeature *feature = [[MGLPointFeature alloc] init];
MGLShapeSource *source = [[MGLShapeSource alloc] initWithIdentifier:@"sourceID" shape:feature options:nil];
MGLHeatmapStyleLayer *layer = [[MGLHeatmapStyleLayer alloc] initWithIdentifier:@"layerID" source:source];
auto rawLayer = layer.rawLayer->as<mbgl::style::HeatmapLayer>();
XCTAssertTrue(rawLayer->getHeatmapColor().isUndefined(),
@"heatmap-color should be unset initially.");
NSExpression *defaultExpression = layer.heatmapColor;
NSExpression *constantExpression = [NSExpression expressionWithFormat:@"%@", [MGLColor redColor]];
layer.heatmapColor = constantExpression;
mbgl::style::PropertyValue<float> propertyValue = { 0xff };
XCTAssertEqual(rawLayer->getHeatmapColor().evaluate(0.0), mbgl::Color::red(),
@"Setting heatmapColor to a constant value expression should update heatmap-color.");
XCTAssertEqualObjects(layer.heatmapColor, constantExpression,
@"heatmapColor should round-trip constant value expressions.");
constantExpression = [NSExpression expressionWithFormat:@"%@", [MGLColor redColor]];
NSExpression *constantExpression2 = [NSExpression expressionWithFormat:@"%@", [MGLColor blueColor]];
NSExpression *functionExpression = [NSExpression expressionWithFormat:@"mgl_step:from:stops:($heatmapDensity, %@, %@)", constantExpression, @{@12: constantExpression2}];
layer.heatmapColor = functionExpression;
XCTAssertEqual(rawLayer->getHeatmapColor().evaluate(11.0), mbgl::Color::red(),
@"Setting heatmapColor to an expression depending on $heatmapDensity should update heatmap-color.");
XCTAssertEqual(rawLayer->getHeatmapColor().evaluate(12.0), mbgl::Color::blue(),
@"Setting heatmapColor to an expression depending on $heatmapDensity should update heatmap-color.");
XCTAssertEqualObjects(layer.heatmapColor, functionExpression,
@"heatmapColor should round-trip expressions depending on $heatmapDensity.");
layer.heatmapColor = nil;
XCTAssertTrue(rawLayer->getHeatmapColor().isUndefined(),
@"Unsetting heatmapColor should return heatmap-color to the default value.");
// The contained colors aren’t object equal, even though their descriptions are.
XCTAssertEqualObjects(layer.heatmapColor.description, defaultExpression.description,
@"heatmapColor should return the default value after being unset.");
functionExpression = [NSExpression expressionWithFormat:@"mgl_step:from:stops:($zoomLevel, %@, %@)", constantExpression, @{@18: constantExpression}];
XCTAssertThrowsSpecificNamed(layer.heatmapColor = functionExpression, NSException, NSInvalidArgumentException, @"MGLHeatmapLayer should raise an exception if a camera expression is applied to heatmapColor.");
functionExpression = [NSExpression expressionForKeyPath:@"bogus"];
XCTAssertThrowsSpecificNamed(layer.heatmapColor = functionExpression, NSException, NSInvalidArgumentException, @"MGLHeatmapLayer should raise an exception if a data expression is applied to heatmapColor.");
functionExpression = [NSExpression expressionWithFormat:@"mgl_step:from:stops:(bogus, %@, %@)", constantExpression, @{@18: constantExpression}];
functionExpression = [NSExpression expressionWithFormat:@"mgl_interpolate:withCurveType:parameters:stops:($zoomLevel, 'linear', nil, %@)", @{@10: functionExpression}];
XCTAssertThrowsSpecificNamed(layer.heatmapColor = functionExpression, NSException, NSInvalidArgumentException, @"MGLHeatmapLayer should raise an exception if a camera-data expression is applied to a property that does not support key paths to feature attributes.");
}
@end
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