Set map tiler URL from well known if available (#5633)

UnitTests/Sources/MatrixClientWellKnownTests.swift

@@ -0,0 +1,75 @@
+//
+// Copyright 2025 Element Creations Ltd.
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+@testable import ElementX
+import Foundation
+import MatrixRustSDKMocks
+import Testing
+
+/// Exercises ``ClientProtocol.updateMapTilerSettings(in:)``. The SDK is now the
+/// source of truth for parsing the matrix client well-known and exposing the
+/// `tile_server` field as a typed ``TileServerInfo``; these tests just check
+/// that we forward it into ``AppSettings`` correctly.
+struct MatrixClientWellKnownTests {
+    private static let mapStyleURLString = "https://maps.example.com/maps/streets-v2/style.json?key=server"
+    
+    @Test
+    func mapStyleURLIsApplied() async throws {
+        let appSettings = AppSettings.volatile()
+        let client = ClientSDKMock(.init(tileServerMapStyleURL: Self.mapStyleURLString))
+        
+        await client.updateMapTilerSettings(in: appSettings)
+        
+        #expect(appSettings.mapTilerSettings.isRemotelyConfigured)
+        let expectedURL = try #require(URL(string: Self.mapStyleURLString))
+        #expect(appSettings.mapTilerSettings.publisher.value == .url(expectedURL))
+    }
+    
+    @Test
+    func missingTileServerClearsExistingOverride() async throws {
+        let appSettings = AppSettings.volatile()
+        let expectedURL = try #require(URL(string: Self.mapStyleURLString))
+        appSettings.mapTilerSettings.applyRemoteValue(.url(expectedURL))
+        #expect(appSettings.mapTilerSettings.isRemotelyConfigured)
+        
+        // The SDK returns nil when the homeserver hasn't advertised a tile server.
+        let client = ClientSDKMock(.init())
+        await client.updateMapTilerSettings(in: appSettings)
+        
+        #expect(!appSettings.mapTilerSettings.isRemotelyConfigured)
+    }
+    
+    @Test
+    func invalidMapStyleURLClearsOverride() async throws {
+        let appSettings = AppSettings.volatile()
+        let expectedURL = try #require(URL(string: Self.mapStyleURLString))
+        appSettings.mapTilerSettings.applyRemoteValue(.url(expectedURL))
+        
+        // The SDK returns the string verbatim — if it isn't a valid URL we just
+        // drop any previous override rather than crash.
+        let client = ClientSDKMock(.init(tileServerMapStyleURL: ""))
+        await client.updateMapTilerSettings(in: appSettings)
+        
+        #expect(!appSettings.mapTilerSettings.isRemotelyConfigured)
+    }
+    
+    @Test
+    func mapTilerSettingsResolveToOverride() async {
+        let appSettings = AppSettings.volatile()
+        let client = ClientSDKMock(.init(tileServerMapStyleURL: Self.mapStyleURLString))
+        
+        await client.updateMapTilerSettings(in: appSettings)
+        
+        switch appSettings.mapTilerSettings.publisher.value {
+        case .url(let url):
+            #expect(url.absoluteString == Self.mapStyleURLString)
+        case .configuration:
+            Issue.record("Expected the resolved settings to be .url")
+        }
+    }
+}