fix: update Paykit tests to use DI

Author: JOHN

app/src/test/java/to/bitkit/paykit/PaykitManagerTest.kt

@@ -1,6 +1,9 @@
 package to.bitkit.paykit
 
 import org.junit.Test
+import org.mockito.kotlin.mock
+import to.bitkit.paykit.services.PubkyRingBridge
+import to.bitkit.paykit.services.PubkySDKService
 import to.bitkit.test.BaseUnitTest
 import kotlin.test.assertFalse
 
@@ -11,7 +14,9 @@ class PaykitManagerTest : BaseUnitTest() {
 
     @Test
     fun `manager is not initialized by default`() = test {
-        val manager = PaykitManager.getInstance()
+        val mockBridge: PubkyRingBridge = mock()
+        val mockSDKService: PubkySDKService = mock()
+        val manager = PaykitManager(mockBridge, mockSDKService)
         assertFalse(manager.isInitialized)
     }
 }

app/src/test/java/to/bitkit/paykit/services/PubkyRingBridgeTest.kt

@@ -24,10 +24,13 @@ class PubkyRingBridgeTest {
     private lateinit var bridge: PubkyRingBridge
     private lateinit var mockContext: Context
     private lateinit var mockPackageManager: PackageManager
+    private lateinit var mockKeychainStorage: to.bitkit.paykit.storage.PaykitKeychainStorage
 
     @Before
     fun setUp() {
-        bridge = PubkyRingBridge.getInstance()
+        mockKeychainStorage = mock()
+        whenever(mockKeychainStorage.getString(org.mockito.kotlin.any())).thenReturn(null)
+        bridge = PubkyRingBridge(mockKeychainStorage)
         bridge.clearCache()
         mockContext = mock()
         mockPackageManager = mock()