mirror of
https://github.com/fxm90/GradientLoadingBar.git
synced 2026-04-17 12:17:30 +00:00
Felix Mau
309 lines
13 KiB
Swift
309 lines
13 KiB
Swift
//
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// GradientActivityIndicatorViewModelTestCase.swift
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// GradientLoadingBar_Tests
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//
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// Created by Felix Mau on 08/26/19.
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// Copyright © 2019 CocoaPods. All rights reserved.
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//
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import XCTest
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import LightweightObservable
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@testable import GradientLoadingBar
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// swiftlint:disable:next type_name
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class GradientActivityIndicatorViewModelTestCase: XCTestCase {
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// MARK: - Private properties
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private var delegateMock: GradientActivityIndicatorViewModelDelegateMock!
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private var viewModel: GradientActivityIndicatorViewModel!
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// MARK: - Public methods
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override func setUp() {
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super.setUp()
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delegateMock = GradientActivityIndicatorViewModelDelegateMock()
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viewModel = GradientActivityIndicatorViewModel()
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viewModel.delegate = delegateMock
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}
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override func tearDown() {
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viewModel = nil
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delegateMock = nil
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super.tearDown()
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}
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// MARK: - Test initializer
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func testInitializerShouldSetGradientLayerColorsToCorrectValue() {
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let expectedGradientLayerColors = makeGradientLayerColors()
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XCTAssertEqual(viewModel.gradientLayerColors.value, expectedGradientLayerColors)
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}
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func testInitializerShouldSetGradientLayerLocationsToCorrectValue() {
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let receivedGradientLayerLocations = viewModel.gradientLayerLocations.value
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let expectedGradientLayerLocations = makeGradientLocationAnimationMatrixInitialRow()
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// Unfortunately there is no easier way comparing an array of type `NSNumber` / `Double` with a given accuracy.
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XCTAssertEqual(receivedGradientLayerLocations.count, expectedGradientLayerLocations.count)
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for (receivedLocation, expectedLocation) in zip(receivedGradientLayerLocations, expectedGradientLayerLocations) {
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XCTAssertEqual(receivedLocation.doubleValue, expectedLocation.doubleValue, accuracy: Double.ulpOfOne)
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}
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}
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func testInitializerShouldSetGradientColorsToStaticConfigurationProperty() {
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XCTAssertEqual(viewModel.gradientColors, UIColor.GradientLoadingBar.gradientColors)
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}
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func testInitializerShouldSetProgressAnimationDurationToStaticConfigurationProperty() {
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XCTAssertEqual(viewModel.progressAnimationDuration, TimeInterval.GradientLoadingBar.progressDuration)
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}
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func testInitializerShouldSetIsHiddenToFalse() {
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XCTAssertFalse(viewModel.isHidden)
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}
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// MARK: - Test property `gradientColors`
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func testSettingGradientColorsShouldUpdateGradientLayerColorsObservable() {
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// Given
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let gradientColors: [UIColor] = [.red, .yellow, .green]
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// When
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viewModel.gradientColors = gradientColors
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// Then
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//
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// `gradientColors = [.red, .yellow, .green]`
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// `gradientLayerColors = [.red, .yellow, .green, .yellow, .red, .yellow, .green]`
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//
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let expectedGradientColors: [UIColor] = [.red, .yellow, .green, .yellow, .red, .yellow, .green]
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let expectedGradientLayerColors = expectedGradientColors.map { $0.cgColor }
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XCTAssertEqual(viewModel.gradientLayerColors.value, expectedGradientLayerColors)
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}
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func testSettingGradientColorsShouldUpdateGradientLayerLocationsObservable() {
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// Given
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let gradientColors: [UIColor] = [.red, .yellow, .green]
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// When
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viewModel.gradientColors = gradientColors
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// Then
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//
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// `gradientColors = [.red, .yellow, .green]`
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// `gradientLayerColors = [.red, .yellow, .green, .yellow, .red, .yellow, .green]`
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//
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// gradientLayerColors | .red | .yellow | .green | .green | .yellow | .red | .yellow | .green
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// initialLocations | 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1
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//
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let expectedGradientLocations = [0, 0, 0, 0, 0, 0.5, 1]
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let expectedGradientLayerLocations = expectedGradientLocations.map { NSNumber(value: $0) }
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XCTAssertEqual(viewModel.gradientLayerLocations.value, expectedGradientLayerLocations)
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}
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// MARK: - Test property `isHidden`
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func testSettingIsHiddenToTrueShouldInformDelegateToStopAnimatingLocations() {
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// When
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viewModel.isHidden = true
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// Then
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XCTAssertEqual(delegateMock.invokedMethod, .stopAnimatingLocations)
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}
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func testSettingIsHiddenToFalseShouldInformDelegateToStartAnimatingLocations() {
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// Given
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// In order to simplify the matrix, we're gonna update the `gradientColors` first.
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let gradientColors: [UIColor] = [.red, .yellow, .green]
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viewModel.gradientColors = gradientColors
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XCTAssertNil(delegateMock.invokedMethod,
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"Precondition failed – Expected delegate not to be informed at this point!")
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// When
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viewModel.isHidden = false
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// Then
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//
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// `gradientColors = [.red, .yellow, .green]`
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// `gradientLayerColors = [.red, .yellow, .green, .yellow, .red, .yellow, .green]`
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//
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// i | .red | .yellow | .green | .yellow | .red | .yellow | .green
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// 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1
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// 1 | 0 | 0 | 0 | 0 | 0.5 | 1 | 1
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// 2 | 0 | 0 | 0 | 0.5 | 1 | 1 | 1
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// 3 | 0 | 0 | 0.5 | 1 | 1 | 1 | 1
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// 4 | 0 | 0.5 | 1 | 1 | 1 | 1 | 1
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//
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let gradientLocationsMatrix = [
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[0, 0, 0, 0, 0, 0.5, 1],
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[0, 0, 0, 0, 0.5, 1, 1],
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[0, 0, 0, 0.5, 1, 1, 1],
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[0, 0, 0.5, 1, 1, 1, 1],
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[0, 0.5, 1, 1, 1, 1, 1]
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]
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let expectedValues = gradientLocationsMatrix.map {
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$0.map { NSNumber(value: $0) }
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}
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XCTAssertEqual(delegateMock.invokedMethod, .startAnimatingLocations(values: expectedValues,
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duration: viewModel.progressAnimationDuration))
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}
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// MARK: - Test method `startAnimationIfNeeded()`
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func testStartAnimationIfNeededShouldNotInformDelegateAsViewIsHidden() {
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// Given
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// As setting the property `isHidden` is also calling the delegate, we have to reset it afterwards.
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viewModel.isHidden = true
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delegateMock.reset()
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// When
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viewModel.startAnimationIfNeeded()
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// Then
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XCTAssertNil(delegateMock.invokedMethod)
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}
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func testStartAnimationIfNeededShouldInformDelegateToStartAnimatingLocations() {
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// Given
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// As setting the property `isHidden` is also calling the delegate, we have to reset it afterwards.
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viewModel.isHidden = false
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delegateMock.reset()
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// In order to simplify the matrix, we're gonna update the `gradientColors` first.
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let gradientColors: [UIColor] = [.red, .yellow, .green, .blue]
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viewModel.gradientColors = gradientColors
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XCTAssertNil(delegateMock.invokedMethod,
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"Precondition failed – Expected delegate not to be informed at this point!")
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// When
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viewModel.startAnimationIfNeeded()
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// Then
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//
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// `gradientColors = [.red, .yellow, .green, .blue]`
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// `gradientLayerColors = [.red, .yellow, .green, .blue, .green, .yellow, .red, .yellow, .green, .blue]`
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//
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// i | .red | .yellow | .green | .blue | .green | .yellow | .red | .yellow | .green | .blue
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// 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.33 | 0.66 | 1
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// 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0.33 | 0.66 | 1 | 1
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// 2 | 0 | 0 | 0 | 0 | 0 | 0.33 | 0.66 | 1 | 1 | 1
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// 3 | 0 | 0 | 0 | 0 | 0.33 | 0.66 | 1 | 1 | 1 | 1
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// 4 | 0 | 0 | 0 | 0.33 | 0.66 | 1 | 1 | 1 | 1 | 1
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// 5 | 0 | 0 | 0.33 | 0.66 | 1 | 1 | 1 | 1 | 1 | 1
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// 6 | 0 | 0.33 | 0.66 | 1 | 1 | 1 | 1 | 1 | 1 | 1
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//
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let oneThird = 1.0 / 3.0
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let twoThird = 2.0 / 3.0
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let gradientLocationsMatrix = [
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[0, 0, 0, 0, 0, 0, 0, oneThird, twoThird, 1],
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[0, 0, 0, 0, 0, 0, oneThird, twoThird, 1, 1],
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[0, 0, 0, 0, 0, oneThird, twoThird, 1, 1, 1],
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[0, 0, 0, 0, oneThird, twoThird, 1, 1, 1, 1],
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[0, 0, 0, oneThird, twoThird, 1, 1, 1, 1, 1],
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[0, 0, oneThird, twoThird, 1, 1, 1, 1, 1, 1],
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[0, oneThird, twoThird, 1, 1, 1, 1, 1, 1, 1]
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]
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let expectedValues = gradientLocationsMatrix.map {
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$0.map { NSNumber(value: $0) }
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}
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XCTAssertEqual(delegateMock.invokedMethod, .startAnimatingLocations(values: expectedValues,
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duration: viewModel.progressAnimationDuration))
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}
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}
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// MARK: - Helpers
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extension GradientActivityIndicatorViewModelTestCase {
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private func makeGradientLayerColors() -> [CGColor] {
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let gradientColors = [
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#colorLiteral(red: 0.2980392157, green: 0.8509803922, blue: 0.3921568627, alpha: 1), #colorLiteral(red: 0.3529411765, green: 0.7843137255, blue: 0.9803921569, alpha: 1), #colorLiteral(red: 0, green: 0.4784313725, blue: 1, alpha: 1), #colorLiteral(red: 0.2039215686, green: 0.6666666667, blue: 0.862745098, alpha: 1), #colorLiteral(red: 0.3450980392, green: 0.337254902, blue: 0.8392156863, alpha: 1), #colorLiteral(red: 1, green: 0.1764705882, blue: 0.3333333333, alpha: 1)
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]
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XCTAssertEqual(gradientColors, UIColor.GradientLoadingBar.gradientColors,
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"Precondition failed – The given gradient colors do not match the current color constant!")
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// swiftlint:disable:next identifier_name
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let reversedGradientColorsWithoutFirstAndLastValue = [
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#colorLiteral(red: 0.3450980392, green: 0.337254902, blue: 0.8392156863, alpha: 1), #colorLiteral(red: 0.2039215686, green: 0.6666666667, blue: 0.862745098, alpha: 1), #colorLiteral(red: 0, green: 0.4784313725, blue: 1, alpha: 1), #colorLiteral(red: 0.3529411765, green: 0.7843137255, blue: 0.9803921569, alpha: 1)
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]
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let infiniteGradientColors = gradientColors + reversedGradientColorsWithoutFirstAndLastValue + gradientColors
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return infiniteGradientColors.map { $0.cgColor }
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}
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private func makeGradientLocations() -> [NSNumber] {
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let gradientLocations = [0, 0.2, 0.4, 0.6, 0.8, 1]
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XCTAssertEqual(gradientLocations.count, UIColor.GradientLoadingBar.gradientColors.count,
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"Precondition failed – The given gradient locations do not match for the current color constant!")
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return gradientLocations.map { NSNumber(value: $0) }
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}
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private func makeGradientLocationAnimationMatrixInitialRow() -> [NSNumber] {
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let gradientLocations = [0, 0.2, 0.4, 0.6, 0.8, 1]
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XCTAssertEqual(gradientLocations.count, UIColor.GradientLoadingBar.gradientColors.count,
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"Precondition failed – The given gradient locations do not match for the current color constant!")
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// The current constant has 6 value and therefore we expect 16 gradient layer colors in total.
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// Ergo we have to fill the first 10 values with "0", before adding the `gradientLocations`.
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//
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// .green | .malibu | .azure | .curious | .violet | .red | .violet | .curious | .azure | .malibu | .green | .malibu | .azure | .curious | .violet | .red
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// 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.4 | 0.6 | 0.8 | 1
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//
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// swiftlint:disable:next identifier_name
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let gradientLocationAnimationMatrixInitialRow = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] + gradientLocations
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return gradientLocationAnimationMatrixInitialRow.map { NSNumber(value: $0) }
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}
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}
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// MARK: - Mocks
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// swiftlint:disable:next type_name
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private class GradientActivityIndicatorViewModelDelegateMock: GradientActivityIndicatorViewModelDelegate {
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// MARK: - Types
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enum DelegateMethod: Equatable {
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case startAnimatingLocations(values: GradientLocationAnimationMatrix, duration: TimeInterval)
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case stopAnimatingLocations
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}
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// MARK: - Public properties
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private(set) var invokedMethod: DelegateMethod?
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// MARK: - Public methods
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func reset() {
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invokedMethod = nil
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}
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// MARK: - `GradientActivityIndicatorViewModelDelegate`
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func startAnimatingLocations(values: GradientLocationAnimationMatrix, duration: TimeInterval) {
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invokedMethod = .startAnimatingLocations(values: values, duration: duration)
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}
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func stopAnimatingLocations() {
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invokedMethod = .stopAnimatingLocations
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}
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}
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