Fix sample project, cleanup tests and add github action

apple/MatrixRustSDK/MatrixRustSDKTests/MatrixRustSDKTests.swift

@@ -9,13 +9,40 @@ import XCTest
 @testable import MatrixRustSDK
 
 class MatrixRustSDKTests: XCTestCase {
-    func testExample() throws {
+    
+    static var client: Client!
+    
+    override class func setUp() {
+        client = try! guestClient(basePath: basePath, homeserver: "https://matrix.org")
+    }
+    
+    func testClientProperties() {
+        XCTAssertTrue(Self.client.isGuest())
+        
+        XCTAssertNotNil(try? Self.client.restoreToken())
+        XCTAssertNotNil(try? Self.client.deviceId())
+        XCTAssertNotNil(try? Self.client.displayName())
+    }
+    
+    func testReadOnlyFileSystemError() {
         do {
             let _ = try loginNewClient(basePath: "", username: "test", password: "test")
-        } catch ClientError.generic(let message) {
+        } catch ClientError.Generic(let message) {
             XCTAssertNotNil(message.range(of: "Read-only file system"))
         } catch {
             XCTFail("Not expecting any other kind of exception")
         }
     }
+    
+    // MARK: - Private
+    
+    static private var basePath: String {
+        guard let url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
+            fatalError("Should always be able to retrieve the caches directory")
+        }
+        
+        try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: false, attributes: nil)
+        
+        return url.path
+    }
 }