TransformScaleTests.swift

@testable import GISTools
import XCTest

final class TransformScaleTests: XCTestCase {

    func testTransformScale() throws {
        let polygon = try XCTUnwrap(Polygon([[Coordinate3D(latitude: 0.0, longitude: 0.0), Coordinate3D(latitude: 10.0, longitude: 0.0), Coordinate3D(latitude: 10.0, longitude: 10.0), Coordinate3D(latitude: 0.0, longitude: 10.0), Coordinate3D(latitude: 0.0, longitude: 0.0)]]))

        let transformed1 = polygon.transformedScale(factor: 2.0, anchor: .southWest)
        let transformed2 = polygon.transformedScale(factor: 2.0, anchor: .northEast)
        let transformed3 = polygon.transformedScale(factor: 2.0, anchor: .center)
        let transformed4 = polygon.transformedScale(factor: 2.0, anchor: .coordinate(.zero))

        let result1 =  try XCTUnwrap(Polygon([[Coordinate3D(latitude: 0.0, longitude: 0.0), Coordinate3D(latitude: 20.0, longitude: 0.0), Coordinate3D(latitude: 20.0, longitude: 20.315053115711862), Coordinate3D(latitude: 0.0, longitude: 20.0), Coordinate3D(latitude: 0.0, longitude: 0.0)]]))
        let result2 =  try XCTUnwrap(Polygon([[Coordinate3D(latitude: -10.0, longitude: -10.0), Coordinate3D(latitude: 10.0, longitude: -10.0), Coordinate3D(latitude: 10.0, longitude: 10.0), Coordinate3D(latitude: -10.0, longitude: 10.0), Coordinate3D(latitude: -10.0, longitude: -10.0)]]))
        let result3 =  try XCTUnwrap(Polygon([[Coordinate3D(latitude: -5.0190006978611512, longitude: -4.9616312267024796), Coordinate3D(latitude: 14.980999302138857, longitude: -5.0384246584612811), Coordinate3D(latitude: 14.980999302138846, longitude: 15.116349907099902), Coordinate3D(latitude: -5.0190006978611512, longitude: 15.03836877329752), Coordinate3D(latitude: -5.0190006978611512, longitude: -4.9616312267024796)]]))
        let result4 =  try XCTUnwrap(Polygon([[Coordinate3D(latitude: 0.0, longitude: 0.0), Coordinate3D(latitude: 20.0, longitude: 0.0), Coordinate3D(latitude: 20.0, longitude: 20.315053115711862), Coordinate3D(latitude: 0.0, longitude: 20.0), Coordinate3D(latitude: 0.0, longitude: 0.0)]]))

        XCTAssertEqual(transformed1, result1)
        XCTAssertEqual(transformed2, result2)
        XCTAssertEqual(transformed3, result3)
        XCTAssertEqual(transformed4, result4)
    }

}