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session-ios/Signal/test/views/ImageEditor/ImageEditorModelTest.swift

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Sketch out crop tool.
6 years ago
//
// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
//
import XCTest
@testable import Signal
@testable import SignalMessaging
class ImageEditorModelTest: SignalBaseTest {
func testImageEditorTransform0() {
let imageSizePixels = CGSize(width: 200, height: 300)
let outputSizePixels = CGSize(width: 200, height: 300)
let unitTranslation = CGPoint.zero
let rotationRadians: CGFloat = 0
let scaling: CGFloat = 1
let transform = ImageEditorTransform(outputSizePixels: outputSizePixels, unitTranslation: unitTranslation, rotationRadians: rotationRadians, scaling: scaling)
let viewSize = outputSizePixels
let imageFrame = ImageEditorCanvasView.imageFrame(forViewSize: viewSize, imageSize: imageSizePixels, transform: transform)
let affineTransform = transform.affineTransform(viewSize: viewSize)
XCTAssertEqual(0.0, imageFrame.topLeft.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(0.0, imageFrame.topLeft.applying(affineTransform).y, accuracy: 0.1)
XCTAssertEqual(100.0, imageFrame.center.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(150.0, imageFrame.center.applying(affineTransform).y, accuracy: 0.1)
XCTAssertEqual(200.0, imageFrame.bottomRight.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(300.0, imageFrame.bottomRight.applying(affineTransform).y, accuracy: 0.1)
}
func testImageEditorTransform1() {
let imageSizePixels = CGSize(width: 864, height: 1536)
let outputSizePixels = CGSize(width: 432, height: 768)
let unitTranslation = CGPoint(x: +0.5, y: -0.5)
let rotationRadians: CGFloat = 0
let scaling: CGFloat = 2
let transform = ImageEditorTransform(outputSizePixels: outputSizePixels, unitTranslation: unitTranslation, rotationRadians: rotationRadians, scaling: scaling)
let viewSize = CGSize(width: 335, height: 595)
let imageFrame = ImageEditorCanvasView.imageFrame(forViewSize: viewSize, imageSize: imageSizePixels, transform: transform)
let affineTransform = transform.affineTransform(viewSize: viewSize)
XCTAssertEqual(0.0, imageFrame.topLeft.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(0.0, imageFrame.topLeft.applying(affineTransform).y, accuracy: 0.1)
XCTAssertEqual(100.0, imageFrame.center.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(150.0, imageFrame.center.applying(affineTransform).y, accuracy: 0.1)
XCTAssertEqual(200.0, imageFrame.bottomRight.applying(affineTransform).x, accuracy: 0.1)
XCTAssertEqual(300.0, imageFrame.bottomRight.applying(affineTransform).y, accuracy: 0.1)
}
func testAffineTransformComposition() {
XCTAssertEqual(+20.0, CGPoint.zero.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).scale(5)).x, accuracy: 0.1)
XCTAssertEqual(+30.0, CGPoint.zero.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).scale(5)).y, accuracy: 0.1)
XCTAssertEqual(+100.0, CGPoint.zero.applying(CGAffineTransform.scale(5).translate(CGPoint(x: 20, y: 30))).x, accuracy: 0.1)
XCTAssertEqual(+150.0, CGPoint.zero.applying(CGAffineTransform.scale(5).translate(CGPoint(x: 20, y: 30))).y, accuracy: 0.1)
XCTAssertEqual(+20.0, CGPoint.zero.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).rotate(CGFloat.halfPi).scale(5)).x, accuracy: 0.1)
XCTAssertEqual(+30.0, CGPoint.zero.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).rotate(CGFloat.halfPi).scale(5)).y, accuracy: 0.1)
XCTAssertEqual(-150.0, CGPoint.zero.applying(CGAffineTransform.scale(5).rotate(CGFloat.halfPi).translate(CGPoint(x: 20, y: 30))).x, accuracy: 0.1)
XCTAssertEqual(+100.0, CGPoint.zero.applying(CGAffineTransform.scale(5).rotate(CGFloat.halfPi).translate(CGPoint(x: 20, y: 30))).y, accuracy: 0.1)
XCTAssertEqual(+25.0, CGPoint.unit.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).scale(5)).x, accuracy: 0.1)
XCTAssertEqual(+35.0, CGPoint.unit.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).scale(5)).y, accuracy: 0.1)
XCTAssertEqual(+105.0, CGPoint.unit.applying(CGAffineTransform.scale(5).translate(CGPoint(x: 20, y: 30))).x, accuracy: 0.1)
XCTAssertEqual(+155.0, CGPoint.unit.applying(CGAffineTransform.scale(5).translate(CGPoint(x: 20, y: 30))).y, accuracy: 0.1)
XCTAssertEqual(+15.0, CGPoint.unit.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).rotate(CGFloat.halfPi).scale(5)).x, accuracy: 0.1)
XCTAssertEqual(+35.0, CGPoint.unit.applying(CGAffineTransform.translate(CGPoint(x: 20, y: 30)).rotate(CGFloat.halfPi).scale(5)).y, accuracy: 0.1)
XCTAssertEqual(-155.0, CGPoint.unit.applying(CGAffineTransform.scale(5).rotate(CGFloat.halfPi).translate(CGPoint(x: 20, y: 30))).x, accuracy: 0.1)
XCTAssertEqual(+105.0, CGPoint.unit.applying(CGAffineTransform.scale(5).rotate(CGFloat.halfPi).translate(CGPoint(x: 20, y: 30))).y, accuracy: 0.1)
}
}