Add tests for RootViewAppearance

Author: Alexey Naumov

CountriesSwiftUI.xcodeproj/project.pbxproj

@@ -46,6 +46,7 @@
 		F661F2CA23777D440014E142 /* SVGImageViewTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = F661F2C923777D440014E142 /* SVGImageViewTests.swift */; };
 		F661F2CC23783E360014E142 /* Helpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = F661F2CB23783E360014E142 /* Helpers.swift */; };
 		F66EDB6823F1599F00A01B9F /* Localizable.strings in Resources */ = {isa = PBXBuildFile; fileRef = F66EDB6A23F1599F00A01B9F /* Localizable.strings */; };
+		F67451F5243A4CC200A4B498 /* RootViewAppearanceTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = F67451F4243A4CC200A4B498 /* RootViewAppearanceTests.swift */; };
 		F67DBD5223663BCD00C83258 /* SystemEventsHandler.swift in Sources */ = {isa = PBXBuildFile; fileRef = F67DBD5123663BCD00C83258 /* SystemEventsHandler.swift */; };
 		F67DBD542366E2E200C83258 /* DependencyInjector.swift in Sources */ = {isa = PBXBuildFile; fileRef = F67DBD532366E2E200C83258 /* DependencyInjector.swift */; };
 		F67DBD652368875A00C83258 /* CountriesWebRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = F67DBD642368875A00C83258 /* CountriesWebRepository.swift */; };
@@ -124,6 +125,7 @@
 		F66EDB6C23F168FF00A01B9F /* fr */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = fr; path = fr.lproj/Localizable.strings; sourceTree = "<group>"; };
 		F66EDB6D23F1691400A01B9F /* es */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = es; path = es.lproj/Localizable.strings; sourceTree = "<group>"; };
 		F66EDB6E23F1692000A01B9F /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/Localizable.strings; sourceTree = "<group>"; };
+		F67451F4243A4CC200A4B498 /* RootViewAppearanceTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RootViewAppearanceTests.swift; sourceTree = "<group>"; };
 		F67833D22369CCBD0065272F /* UnitTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = UnitTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		F67833D62369CCBD0065272F /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		F67DBD5123663BCD00C83258 /* SystemEventsHandler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SystemEventsHandler.swift; sourceTree = "<group>"; };
@@ -181,11 +183,12 @@
 		F60CC501236C3C80007E84B2 /* UI */ = {
 			isa = PBXGroup;
 			children = (
-				F6500B4923C8F2AC0086FD70 /* DeepLinkUITests.swift */,
 				F6E7ACE423F83BEB00AB48AB /* ContentViewTests.swift */,
 				F60CC502236C3CA8007E84B2 /* CountriesListTests.swift */,
 				F60CC506236C5CFA007E84B2 /* CountryDetailsTests.swift */,
+				F6500B4923C8F2AC0086FD70 /* DeepLinkUITests.swift */,
 				F60CC50A236C622C007E84B2 /* ModalDetailsViewTests.swift */,
+				F67451F4243A4CC200A4B498 /* RootViewAppearanceTests.swift */,
 				F661F2C923777D440014E142 /* SVGImageViewTests.swift */,
 				F6F606A723CF25EC00F36F5D /* SearchBarTests.swift */,
 				F60CC508236C6084007E84B2 /* ViewPreviewsTests.swift */,
@@ -568,6 +571,7 @@
 			files = (
 				F60CC507236C5CFA007E84B2 /* CountryDetailsTests.swift in Sources */,
 				F60829712369CE0100DB292E /* RequestMocking.swift in Sources */,
+				F67451F5243A4CC200A4B498 /* RootViewAppearanceTests.swift in Sources */,
 				F661F2C5237772CE0014E142 /* ImagesInteractorTests.swift in Sources */,
 				F6F003B3236AF9F100AAC7C6 /* LoadableTests.swift in Sources */,
 				F60829762369D58A00DB292E /* CountriesWebRepositoryTests.swift in Sources */,

CountriesSwiftUI/UI/RootViewModifier.swift

@@ -15,11 +15,15 @@ struct RootViewAppearance: ViewModifier {
 
     @Environment(\.injected) private var injected: DIContainer
     @State private var isActive: Bool = false
+    let inspection = PassthroughSubject<((AnyView) -> Void), Never>()
 
     func body(content: Content) -> some View {
         content
             .blur(radius: isActive ? 0 : 10)
             .onReceive(stateUpdate) { self.isActive = $0 }
+            .onReceive(inspection) { callback in
+                callback(AnyView(self.body(content: content)))
+            }
     }
 
     private var stateUpdate: AnyPublisher<Bool, Never> {

UnitTests/UI/RootViewAppearanceTests.swift

@@ -0,0 +1,64 @@
+//
+//  RootViewAppearanceTests.swift
+//  UnitTests
+//
+//  Created by Alexey Naumov on 05.04.2020.
+//  Copyright © 2020 Alexey Naumov. All rights reserved.
+//
+
+import XCTest
+import SwiftUI
+import ViewInspector
+@testable import CountriesSwiftUI
+
+private typealias ModifierContent = _ViewModifier_Content<RootViewAppearance>
+
+extension ModifierContent: Inspectable { }
+
+final class RootViewAppearanceTests: XCTestCase {
+
+    func test_blur_whenInactive() {
+        let sut = RootViewAppearance()
+        let exp = XCTestExpectation(description: #function)
+        let container = DIContainer(appState: .init(AppState()),
+                                    interactors: .mocked())
+        XCTAssertFalse(container.appState.value.system.isActive)
+        DispatchQueue.main.async {
+            sut.inspection.send { body in
+                body.inspect { content in
+                    XCTAssertEqual(try content.anyView()
+                        .view(ModifierContent.self).blur().radius, 10)
+                }
+                ViewHosting.expel()
+                exp.fulfill()
+            }
+        }
+        let view = EmptyView().modifier(sut)
+            .environment(\.injected, container)
+        ViewHosting.host(view: view)
+        wait(for: [exp], timeout: 0.1)
+    }
+    
+    func test_blur_whenActive() {
+        let sut = RootViewAppearance()
+        let exp = XCTestExpectation(description: #function)
+        let container = DIContainer(appState: .init(AppState()),
+                                    interactors: .mocked())
+        container.appState[\.system.isActive] = true
+        XCTAssertTrue(container.appState.value.system.isActive)
+        DispatchQueue.main.async {
+            sut.inspection.send { body in
+                body.inspect { content in
+                    XCTAssertEqual(try content.anyView()
+                        .view(ModifierContent.self).blur().radius, 0)
+                }
+                ViewHosting.expel()
+                exp.fulfill()
+            }
+        }
+        let view = EmptyView().modifier(sut)
+            .environment(\.injected, container)
+        ViewHosting.host(view: view)
+        wait(for: [exp], timeout: 0.1)
+    }
+}