update base64 test

Author: marius-se

Tests/WebAuthnTests/HelpersTests.swift

@@ -11,13 +11,14 @@ final class HelpersTests: XCTestCase {
     }
 
     func testBase64URLEncodeReturnsCorrectString() {
-        let input: [UInt8] = [1, 0, 1, 0, 1, 1]
-        let expectedBase64 = Data(bytes: input, count: input.count).base64EncodedString()
+        let input: [UInt8] = [1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0]
+        let expectedBase64 = "AQABAAEBAAEAAQEAAAABAA=="
+        let expectedBase64URL = "AQABAAEBAAEAAQEAAAABAA"
 
+        let base64Encoded = input.base64EncodedString()
         let base64URLEncoded = input.base64URLEncodedString()
-        let base64Encoded = base64URLEncoded.replacingOccurrences(of: "-", with: "+")
-            .replacingOccurrences(of: "_", with: "/")
 
         XCTAssertEqual(expectedBase64, base64Encoded)
+        XCTAssertEqual(expectedBase64URL, base64URLEncoded)
     }
 }