[SASU-0075] Adding snapshot tests

SampleAppSwiftUI/Network/ResponseModels/AllCoinResponse.swift

@@ -39,6 +39,13 @@ struct CoinData: Codable, Hashable, Identifiable {
                                detail: CoinRaw(usd: RawUsd(price: 29467.560,
                                                            changeAmount: 28.015,
                                                            changePercentage: 29.74)))
+
+    static func demoCoin(from name: String) -> CoinData {
+        CoinData(coinInfo: CoinMarketCapsCoinInfo(code: name, title: "Demo"),
+                                   detail: CoinRaw(usd: RawUsd(price: 29467.560,
+                                                               changeAmount: 28.015,
+                                                               changePercentage: 29.74)))
+    }
 }
 
 // MARK: - CoinInfo

SampleAppSwiftUI/Scenes/Favorites/FavoritesView.swift

@@ -5,6 +5,7 @@
 //  Created by Sucu, Ege on 16.03.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct FavoritesView: View {
@@ -48,7 +49,18 @@ struct FavoritesView: View {
 }
 
 struct FavoritesView_Previews: PreviewProvider {
+    static private let router = Router()
+
     static var previews: some View {
-        FavoritesView()
+        snapshot.previews
+    }
+
+    static var snapshot: PreviewSnapshots<Void?> {
+        .init(configurations: [
+            .init(name: "Favorites  View", state: nil)
+        ], configure: { _ in
+            FavoritesView()
+                .environmentObject(router)
+        })
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/CoinListView.swift

@@ -6,6 +6,7 @@
 //
 
 import SwiftUI
+import PreviewSnapshots
 
 struct CoinListView<ViewModel: ViewModelProtocol>: View {
     @ObservedObject var viewModel: ViewModel
@@ -76,8 +77,22 @@ struct CoinListView<ViewModel: ViewModelProtocol>: View {
 
 struct CoinListView_Previews: PreviewProvider {
     static var previews: some View {
-        NavigationView {
-            CoinListView(viewModel: HomeViewModel(), filteredCoins: .constant([.demo, .demo, .demo]), favoriteChanged: {})
-        }
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<[CoinData]> {
+        .init(configurations: [
+            .init(name: "One coin", state: [.demo]),
+            .init(name: "Two coins", state: [.demo, CoinData.demoCoin(from: "DOGE")]),
+            .init(name: "Three coins", state: [.demo,
+                                               CoinData.demoCoin(from: "DOGE"),
+                                               CoinData.demoCoin(from: "ETH")]),
+            .init(name: "Four coins", state: [.demo,
+                                              CoinData.demoCoin(from: "DOGE"),
+                                              CoinData.demoCoin(from: "ETH"),
+                                              CoinData.demoCoin(from: "FTM")])
+        ], configure: { state in
+            CoinListView(viewModel: HomeViewModel(), filteredCoins: .constant(state), favoriteChanged: {})
+        })
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/CoinView.swift

@@ -5,6 +5,7 @@
 //  Created by Sucu, Ege on 21.03.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct CoinView: View {
@@ -79,15 +80,16 @@ struct CoinView: View {
 
 struct CoinView_Previews: PreviewProvider {
     static var previews: some View {
-        Group {
-            CoinView(coinInfo: .demo)
-            CoinView(coinInfo: .demo)
-                .preferredColorScheme(.dark)
-        }
-        .previewLayout(.sizeThatFits)
-        .frame(height: Dimensions.coinCellSize)
-        .padding(.horizontal, Paddings.side)
-        .padding(.vertical)
+        snapshots.previews
+    }
 
+    static var snapshots: PreviewSnapshots<CoinData> {
+        PreviewSnapshots(configurations: [
+            .init(name: "BTC", state: .demo),
+            .init(name: "DOGE", state: CoinData.demoCoin(from: "DOGE")),
+            .init(name: "ETH", state: CoinData.demoCoin(from: "ETH"))
+        ]) { state in
+            CoinView(coinInfo: state)
+        }
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/Detail/ChangePercentageView.swift

@@ -5,6 +5,7 @@
 //  Created by Abay, Batuhan on 22.05.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct ChangePercentageView: View {
@@ -29,6 +30,16 @@ struct ChangePercentageView: View {
 
 struct ChangePercentageView_Previews: PreviewProvider {
     static var previews: some View {
-        ChangePercentageView(changeRate: CoinData.demo.detail?.usd ?? .init())
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<RawUsd> {
+        .init(configurations: [
+            .init(name: "Positive Change", state: CoinData.demo.detail?.usd ?? .init()),
+            .init(name: "Neutral", state: RawUsd(changePercentage: 0)),
+            .init(name: "Negative", state: RawUsd(changePercentage: -14.33))
+        ]) { state in
+            ChangePercentageView(changeRate: state)
+        }
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/Detail/CoinChartHistoryRangeButtons.swift

@@ -5,6 +5,7 @@
 //  Created by Abay, Batuhan on 30.05.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct CoinChartHistoryRangeButtons: View {
@@ -36,6 +37,20 @@ struct CoinChartHistoryRangeButtons: View {
 
 struct CoinChartHistoryRangeButtons_Previews: PreviewProvider {
     static var previews: some View {
-        CoinChartHistoryRangeButtons(selection: .constant(.oneMonth))
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<CoinChartHistoryRange> {
+        .init(configurations: [
+            .init(name: "One day", state: .oneDay),
+            .init(name: "One week", state: .oneWeek),
+            .init(name: "One month", state: .oneMonth),
+            .init(name: "Three months", state: .threeMonth),
+            .init(name: "Six months", state: .sixMonth),
+            .init(name: "One year", state: .oneYear),
+            .init(name: "All dates", state: .all)
+        ]) { state in
+            CoinChartHistoryRangeButtons(selection: .constant(state))
+        }
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/Detail/CoinDetailView.swift

@@ -5,6 +5,7 @@
 //  Created by Abay, Batuhan on 22.05.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct CoinDetailView: View {
@@ -84,8 +85,8 @@ struct CoinDetailView: View {
                         viewModel.updateCoinFavoriteState()
                     } label: {
                         viewModel.isFavorite
-                        ? Image(systemName: Images.favorites)
-                        : Image(systemName: Images.star)
+                            ? Image(systemName: Images.favorites)
+                            : Image(systemName: Images.star)
                     }
                     .tint(.gray)
                 }
@@ -99,12 +100,16 @@ struct CoinDetailView: View {
 
 struct CoinDetailView_Previews: PreviewProvider {
     static var previews: some View {
-        Group {
-            CoinDetailView(coinData: CoinData.demo)
+        NavigationView {
+            snapshots.previews
+        }
+    }
 
-            NavigationView {
-                CoinDetailView(coinData: CoinData.demo)
-            }
+    static var snapshots: PreviewSnapshots<CoinData> {
+        .init(configurations: [
+            .init(name: "Coin detail view", state: .demo)
+        ]) { state in
+            CoinDetailView(coinData: state)
         }
     }
 }

SampleAppSwiftUI/Scenes/Home/Coin/Detail/CoinPriceHistoryChartView.swift

@@ -5,8 +5,9 @@
 //  Created by Abay, Batuhan on 31.05.2023.
 //
 
-import SwiftUI
 import Charts
+import PreviewSnapshots
+import SwiftUI
 
 struct CoinPriceHistoryChartView: View {
     @StateObject private var viewModel: CoinPriceHistoryChartViewModel
@@ -140,29 +141,18 @@ struct CoinPriceHistoryChartView: View {
 
 struct CoinPriceHistoryChartView_Previews: PreviewProvider {
     static var previews: some View {
-        Group {
-            Group {
-                ForEach(CoinChartHistoryRange.allCases) { item in
-                    CoinPriceHistoryChartView(
-                        selectedRange: item,
-                        dataModel: .demo,
-                        selectedXDateText: .constant("")
-                    )
-                    .previewDisplayName(item.rawValue)
-                }
-            }
+        snapshots.previews
+    }
 
-            Group {
-                ForEach(CoinChartHistoryRange.allCases) { item in
-                    CoinPriceHistoryChartView(
-                        selectedRange: item,
-                        dataModel: .demo,
-                        selectedXDateText: .constant("")
-                    )
-                    .previewDisplayName(item.rawValue + "DARK")
-                }
-            }
-            .preferredColorScheme(.dark)
+    static var snapshots: PreviewSnapshots<CoinChartHistoryRange> {
+        let charts = CoinChartHistoryRange.allCases.map { PreviewSnapshots.Configuration(name: $0.rawValue, state: $0) }
+        return .init(configurations: charts) { state in
+            CoinPriceHistoryChartView(
+                selectedRange: state,
+                dataModel: .demo,
+                selectedXDateText: .constant("")
+            )
+            .previewDisplayName(state.rawValue)
         }
     }
 }

SampleAppSwiftUI/Scenes/Home/HomeFilterView.swift

@@ -5,6 +5,7 @@
 //  Created by Sucu, Ege on 28.03.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct HomeFilterView: View {
@@ -20,6 +21,17 @@ struct HomeFilterView: View {
 
 struct HomeFilterView_Previews: PreviewProvider {
     static var previews: some View {
-        HomeFilterView(filterTitle: "")
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<String> {
+        .init(configurations: [
+            .init(name: "Empty text", state: .empty),
+            .init(name: "Short text", state: "cupidatat"),
+            .init(name: "Long text", state: "Ad tempor cupidatat culpa aliqua amet consectetur velit dolor do est amet.")
+        ]) { state in
+            HomeFilterView(filterTitle: state)
+                .padding(.horizontal)
+        }
     }
 }

SampleAppSwiftUI/Scenes/Home/HomeView.swift

@@ -6,6 +6,7 @@
 //  Copyright © 2022 Adesso Turkey. All rights reserved.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct HomeView: View {
@@ -44,7 +45,18 @@ struct HomeView: View {
 }
 
 struct HomeView_Previews: PreviewProvider {
+    private static let router = Router()
+
     static var previews: some View {
-        HomeView()
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<Void?> {
+        .init(configurations: [
+            .init(name: "Home view", state: nil)
+        ]) { _ in
+            HomeView()
+                .environmentObject(router)
+        }
     }
 }

SampleAppSwiftUI/Scenes/Home/SearchBarView.swift

@@ -5,6 +5,7 @@
 //  Created by Sucu, Ege on 17.03.2023.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct SearchBarView: View {
@@ -34,9 +35,16 @@ struct SearchBarView: View {
 
 struct SearchBarView_Previews: PreviewProvider {
     static var previews: some View {
-        SearchBarView(searchText: .constant(""), topPadding: Paddings.SearchBar.shortTop)
-            .previewLayout(.sizeThatFits)
-            .frame(width: .infinity, height: Dimensions.searchBarHeight)
-            .padding(.vertical)
+        snapshots.previews.previewLayout(.sizeThatFits)
+    }
+
+    static var snapshots: PreviewSnapshots<String> {
+        .init(configurations: [
+            .init(name: "Empty text", state: ""),
+            .init(name: "Short text", state: "Culpa occaecat nostrud."),
+            .init(name: "Long text", state: "Non veniam occaecat et ullamco ad aliquip laborum elit ea incididunt id non Lorem deserunt.")
+        ]) { state in
+            SearchBarView(searchText: .constant(state), topPadding: 0)
+        }
     }
 }

SampleAppSwiftUI/Scenes/Main/MainView.swift

@@ -6,10 +6,10 @@
 //  Copyright © 2022 Adesso Turkey. All rights reserved.
 //
 
+import PreviewSnapshots
 import SwiftUI
 
 struct MainView: View {
-
     @StateObject private var storageManager = StorageManager.shared
     @EnvironmentObject private var router: Router
     var body: some View {
@@ -39,7 +39,17 @@ struct MainView: View {
 }
 
 struct MainView_Previews: PreviewProvider {
+    private static let router = Router()
     static var previews: some View {
-        MainView()
+        snapshots.previews
+    }
+
+    static var snapshots: PreviewSnapshots<Void?> {
+        .init(configurations: [
+            .init(name: "Main View", state: .none)
+        ]) { _ in
+            MainView()
+                .environmentObject(router)
+        }
     }
 }