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refactor to reuse CompareTransformSpecConfiguration

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This commit is contained in:
Paul Zabelin
2019-04-10 02:53:10 -07:00
parent b0455dfef6
commit 137dfd5808
4 changed files with 84 additions and 113 deletions
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55
Example/Tests/CompareMethodsSpec.swift
View File

@@ -2,61 +2,6 @@ import Quick
import Nimble
import PerspectiveTransform
typealias Transformer = (CGRect, [CGPoint]) -> CATransform3D
class CompareTransformSpecConfiguration: QuickConfiguration {
override class func configure(_ configuration: Configuration) {
sharedExamples("transformer") { context in
var transformer: TransformMatrixCalculator!
let points = [
CGPoint(x: 108.315837, y: 80.1687782),
CGPoint(x: 377.282671, y: 41.4352201),
CGPoint(x: 193.321418, y: 330.023027),
CGPoint(x: 459.781253, y: 251.836131)
]
let frame = CGRect(origin: CGPoint.zero,
size: CGSize(width: 20, height: 10))
beforeEach {
transformer = context()["method"] as? TransformMatrixCalculator
}
it("should be identity for same start and destination") {
let points = [CGPoint(x: 0, y: 0), CGPoint(x: 20, y: 0), CGPoint(x: 0, y: 10), CGPoint(x: 20, y: 10)]
let toItself = transformer.transform(frame: frame, points: points)
expect(toItself) ≈ CATransform3DIdentity
}
it("produce the same solution as algebraic method") {
let algebra = AlgebraMethod()
expect(transformer.transform(frame: frame, points: points)) ≈ algebra.transform(frame: frame, points: points)
}
}
}
}
protocol TransformMatrixCalculator {
func transform(frame: CGRect, points: [CGPoint]) -> CATransform3D
}
struct AlgebraMethod: TransformMatrixCalculator {
func transform(frame: CGRect, points: [CGPoint]) -> CATransform3D {
let destination = QuadrilateralCalc()
destination.topLeft = points[0]
destination.topRight = points[1]
destination.bottomLeft = points[2]
destination.bottomRight = points[3]
let start = QuadrilateralCalc()
start.topLeft = CGPoint(x: frame.minX, y: frame.minY)
start.topRight = CGPoint(x: frame.maxX, y: frame.minY)
start.bottomLeft = CGPoint(x: frame.minX, y: frame.maxY)
start.bottomRight = CGPoint(x: frame.maxX, y: frame.maxY)
return start.rectToQuad(rect: start.box(), quad: destination)
}
}
struct MatrixMethod: TransformMatrixCalculator {
func transform(frame: CGRect, points: [CGPoint]) -> CATransform3D {
return Perspective(frame).projectiveTransform(destination: Perspective(points))

63
Example/Tests/CompareTransformSpecConfiguration.swift Normal file
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@@ -0,0 +1,63 @@
//
// CompareTransformSpecConfiguration.swift
// Application Specs
//
// Created by Paul Zabelin on 4/10/19.
// Copyright © 2019 CocoaPods. All rights reserved.
//
import Quick
import Nimble
class CompareTransformSpecConfiguration: QuickConfiguration {
override class func configure(_ configuration: Configuration) {
sharedExamples("transformer") { sharedContext in
var transformer: TransformMatrixCalculator!
let points = [
CGPoint(x: 108.315837, y: 80.1687782),
CGPoint(x: 377.282671, y: 41.4352201),
CGPoint(x: 193.321418, y: 330.023027),
CGPoint(x: 459.781253, y: 251.836131)
]
let frame = CGRect(origin: CGPoint.zero,
size: CGSize(width: 20, height: 10))
beforeEach {
transformer = sharedContext()["method"] as? TransformMatrixCalculator
}
it("should be identity for same start and destination") {
let points = [CGPoint(x: 0, y: 0), CGPoint(x: 20, y: 0), CGPoint(x: 0, y: 10), CGPoint(x: 20, y: 10)]
let toItself = transformer.transform(frame: frame, points: points)
expect(toItself) ≈ CATransform3DIdentity
}
it("produce the same solution as the algebraic method") {
let algebra = AlgebraMethod()
expect(transformer.transform(frame: frame, points: points)) ≈ algebra.transform(frame: frame, points: points)
}
}
}
}
protocol TransformMatrixCalculator {
func transform(frame: CGRect, points: [CGPoint]) -> CATransform3D
}
struct AlgebraMethod: TransformMatrixCalculator {
func transform(frame: CGRect, points: [CGPoint]) -> CATransform3D {
let destination = QuadrilateralCalc()
destination.topLeft = points[0]
destination.topRight = points[1]
destination.bottomLeft = points[2]
destination.bottomRight = points[3]
let start = QuadrilateralCalc()
start.topLeft = CGPoint(x: frame.minX, y: frame.minY)
start.topRight = CGPoint(x: frame.maxX, y: frame.minY)
start.bottomLeft = CGPoint(x: frame.minX, y: frame.maxY)
start.bottomRight = CGPoint(x: frame.maxX, y: frame.maxY)
return start.rectToQuad(rect: start.box(), quad: destination)
}
}