refactor tests

Author: marius-se

Sources/WebAuthn/Ceremonies/Registration/AuthenticatorAttestationResponse.swift

@@ -18,7 +18,7 @@ import SwiftCBOR
 /// The response from the authenticator device for the creation of a new public key credential.
 public struct AuthenticatorAttestationResponse: Codable {
     public let clientDataJSON: URLEncodedBase64
-    public let attestationObject: String
+    public let attestationObject: URLEncodedBase64
 }
 
 /// A parsed version of `AuthenticatorAttestationResponse`

Sources/WebAuthn/WebAuthnError.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-public enum WebAuthnError: Error {
+public enum WebAuthnError: Error, Equatable {
     // MARK: Shared
     case invalidClientDataJSON
     case attestedCredentialDataMissing

Tests/WebAuthnTests/Ceremonies/Registration/ParsedAuthenticatorAttestationResponseTests.swift

@@ -0,0 +1,33 @@
+import XCTest
+import WebAuthn
+
+func assertThrowsError<T, E: Error>(
+    _ expression: @autoclosure () async throws -> T,
+    _ message: @autoclosure () -> String = "",
+    file: StaticString = #filePath,
+    line: UInt = #line,
+    _ errorHandler: (_ error: E) -> Void = { _ in }
+) async {
+    do {
+        _ = try await expression()
+        XCTFail(message(), file: file, line: line)
+    } catch {
+        guard let error = error as? E else {
+            XCTFail("Error was thrown, but didn't match expected type '\(E.self)'. Got: '\(type(of: error))'")
+            return
+        }
+        errorHandler(error)
+    }
+}
+
+func assertThrowsError<T, E: Error & Equatable>(
+    _ expression: @autoclosure () async throws -> T,
+    _ message: @autoclosure () -> String = "",
+    file: StaticString = #filePath,
+    line: UInt = #line,
+    expect: E
+) async {
+    try await assertThrowsError(await expression(), message(), file: file, line: line) { error in
+        XCTAssertEqual(error, expect, message(), file: file, line: line)
+    }
+}