test(wif): add minimal coverage

Author: otaliptus

BDKSwiftExampleWallet/View/Send/AddressView.swift

@@ -133,7 +133,7 @@ extension AddressView {
         }
     }
 
-    private func extractWif(from value: String) -> String? {
+    func extractWif(from value: String) -> String? {
         var candidates = [value]
 
         if let components = URLComponents(string: value),
@@ -164,7 +164,7 @@ extension AddressView {
         return nil
     }
 
-    private func isLikelyWif(_ value: String) -> Bool {
+    func isLikelyWif(_ value: String) -> Bool {
         guard value.count == 51 || value.count == 52 else {
             return false
         }

BDKSwiftExampleWalletTests/BDKSwiftExampleWalletTests.swift

@@ -5,8 +5,22 @@
 //  Created by Matthew Ramsden on 5/22/23.
 //
 
+import SwiftUI
 import XCTest
 
 @testable import BDKSwiftExampleWallet
 
-final class BDKSwiftExampleWalletTests: XCTestCase {}
+final class BDKSwiftExampleWalletTests: XCTestCase {
+
+    func testExtractWifDetectsPrefixedWifAndRejectsRandomString() {
+        let view = AddressView(navigationPath: .constant(NavigationPath()))
+        let likelyWif = "c" + String(repeating: "1", count: 51)
+
+        XCTAssertEqual(view.extractWif(from: "wif:\(likelyWif)"), likelyWif)
+        XCTAssertNil(
+            view.extractWif(
+                from: "12cUi8cuUJRiFmGEu4jCAsonSS1dkVyaD7Aoo6URRiXpmaokikuyM778786"
+            )
+        )
+    }
+}