Make Android HttpNegotiateAuthenticator work without an activity

net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java

Index: net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java
diff --git a/net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java b/net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java
index 0044420ca1fb9e5108251a6b5313048dce179eda..5c71d4a244be55eeeb6084d8482d1b2b38dccb82 100644
--- a/net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java
+++ b/net/android/junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java
@@ -9,38 +9,59 @@
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.fail;
+import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;
 import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.anyString;
 import static org.mockito.Matchers.eq;
+import static org.mockito.Matchers.isNull;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
+import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.accounts.AccountManagerCallback;
 import android.accounts.AccountManagerFuture;
 import android.accounts.AuthenticatorException;
 import android.accounts.OperationCanceledException;
 import android.app.Activity;
+import android.app.Application;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 
+import junit.framework.Assert;
+
+import org.chromium.base.ApplicationStatus;
 import org.chromium.base.BaseChromiumApplication;
 import org.chromium.base.test.shadows.ShadowMultiDex;
+import org.chromium.net.HttpNegotiateAuthenticator.GetAccountsCallback;
+import org.chromium.net.HttpNegotiateAuthenticator.RequestData;
 import org.chromium.testing.local.LocalRobolectricTestRunner;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
 import org.robolectric.Robolectric;
 import org.robolectric.annotation.Config;
 import org.robolectric.annotation.Implementation;
 import org.robolectric.annotation.Implements;
 import org.robolectric.shadows.ShadowAccountManager;
+import org.robolectric.shadows.ShadowApplication;
 
 import java.io.IOException;
+import java.util.List;
 
 /**
  * Robolectric tests for HttpNegotiateAuthenticator
@@ -50,59 +71,35 @@
         shadows = {HttpNegotiateAuthenticatorTest.ExtendedShadowAccountManager.class,
                 ShadowMultiDex.class})
 public class HttpNegotiateAuthenticatorTest {
-    private static class GetAuthTokenByFeaturesInvocation {

[dgn, 2015/10/30 12:35:39]

Not needed anymore since we use Mockito mocks instead

-        // Since the account manager is an SDK singleton (it is fetched using AccountManager.get()),
-        // we can't validate its method calls with Mockito, so do so using our shadow method.
-        int mCallCount;
-        String mAccountTypeReceived;
-        String mAuthTokenTypeReceived;
-        String mFeaturesReceived[];
-        Bundle mAddAccountOptionsReceived;
-        Bundle mAuthTokenOptionsReceived;
-        AccountManagerCallback<Bundle> mCallbackReceived;
-        Handler mHandlerReceived;
-
-        public AccountManagerFuture<Bundle> getAuthTokenByFeatures(String accountType,
-                String authTokenType, String[] features, Activity activity,
-                Bundle addAccountOptions, Bundle getAuthTokenOptions,
-                AccountManagerCallback<Bundle> callback, Handler handler) {
-            mCallCount++;
-            mAccountTypeReceived = accountType;
-            mAuthTokenTypeReceived = authTokenType;
-            mFeaturesReceived = features;
-            mAddAccountOptionsReceived = addAccountOptions;
-            mAuthTokenOptionsReceived = getAuthTokenOptions;
-            mCallbackReceived = callback;
-            mHandlerReceived = handler;
-
-            return null;
-        }
-    }
-
-    private static GetAuthTokenByFeaturesInvocation sInvocation;
-
     /**
-     * Robolectic's ShadowAccountManager doesn't implement getAccountsByTypeAndFeature so extend it.
-     * We simply check the call is correct, and don't try to emulate it. This also allows us to do
-     * more checking than we could using a vanilla shadow.
-     *
+     * User the AccountManager to inject a mock instance.
      * Note: Shadow classes need to be public and static.
      */
     @Implements(AccountManager.class)
     public static class ExtendedShadowAccountManager extends ShadowAccountManager {
         @Implementation
-        public AccountManagerFuture<Bundle> getAuthTokenByFeatures(String accountType,
-                String authTokenType, String[] features, Activity activity,
-                Bundle addAccountOptions, Bundle getAuthTokenOptions,
-                AccountManagerCallback<Bundle> callback, Handler handler) {
-            return sInvocation.getAuthTokenByFeatures(accountType, authTokenType, features,
-                    activity, addAccountOptions, getAuthTokenOptions, callback, handler);
+        public static AccountManager get(Context context) {
+            return sMockAccountManager;
         }
     }
 
+    @Mock
+    private static AccountManager sMockAccountManager;
+    @Captor
+    private ArgumentCaptor<AccountManagerCallback<Bundle>> mBundleCallbackCaptor;

[dgn, 2015/10/30 12:35:39]

Captors are done that way to avoid unchecked cast warnings because the generic
parameter can't be specified in calls like
`ArgumentCaptor.forClass(Foo<Bar>.class)`

[aberent, 2015/10/30 16:38:10]

nit: Comment to explain this?

[dgn, 2015/10/30 17:04:40]

It's a completely standard way to declare captors, and the documentation of
@captor[1] even mentions the current issue with generics so it seems pretty
normal. I commented here to give some context on the change from previous
revisions of the patch, but I don't really want to make this look purely like a
workaround, which I think explaining all that via a comment would do.

[1]:http://docs.mockito.googlecode.com/hg/org/mockito/Captor.html

+    @Captor
+    private ArgumentCaptor<AccountManagerCallback<Account[]>> mAccountCallbackCaptor;
+    @Captor
+    private ArgumentCaptor<Bundle> mBundleCaptor;
+
     @Before
     public void setUp() {
-        sInvocation = new GetAuthTokenByFeaturesInvocation();
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @After
+    public void tearDown() {
+        ApplicationStatus.destroyForTesting();
     }
 
     /**
@@ -110,35 +107,150 @@ public void setUp() {
      */
     @Test
     public void testGetNextAuthToken() {
-        HttpNegotiateAuthenticator authenticator =
-                HttpNegotiateAuthenticator.create("Dummy_Account");
+        final String accountType = "Dummy_Account";
+        HttpNegotiateAuthenticator authenticator = HttpNegotiateAuthenticator.create(accountType);
         Robolectric.buildActivity(Activity.class).create().start().resume().visible();
+
         authenticator.getNextAuthToken(0, "test_principal", "", true);
-        assertThat(
-                "getAuthTokenByFeatures called precisely once", sInvocation.mCallCount, equalTo(1));
-        assertThat("Received account type matches input", sInvocation.mAccountTypeReceived,
-                equalTo("Dummy_Account"));
-        assertThat("AuthTokenType is \"SPNEGO:HOSTBASED:test_principal\"",
-                sInvocation.mAuthTokenTypeReceived, equalTo("SPNEGO:HOSTBASED:test_principal"));
-        assertThat("Features are precisely {\"SPNEGO\"}", sInvocation.mFeaturesReceived,
-                equalTo(new String[] {"SPNEGO"}));
-        assertThat("No account options requested", sInvocation.mAddAccountOptionsReceived,
-                nullValue());
+
+        verify(sMockAccountManager).getAuthTokenByFeatures(
+                eq(accountType),
+                eq("SPNEGO:HOSTBASED:test_principal"),
+                eq(new String[] {"SPNEGO"}),
+                any(Activity.class),
+                isNull(Bundle.class),
+                mBundleCaptor.capture(),
+                mBundleCallbackCaptor.capture(),
+                any(Handler.class));
+
         assertThat("There is no existing context",
-                sInvocation.mAuthTokenOptionsReceived.get(
-                        HttpNegotiateConstants.KEY_SPNEGO_CONTEXT),
+                mBundleCaptor.getValue().get(HttpNegotiateConstants.KEY_SPNEGO_CONTEXT),
                 nullValue());
         assertThat("The existing token is empty",
-                sInvocation.mAuthTokenOptionsReceived.getString(
-                        HttpNegotiateConstants.KEY_INCOMING_AUTH_TOKEN),
+                mBundleCaptor.getValue().getString(HttpNegotiateConstants.KEY_INCOMING_AUTH_TOKEN),
                 equalTo(""));
-        assertThat("Delegation is allowed", sInvocation.mAuthTokenOptionsReceived.getBoolean(
-                                                    HttpNegotiateConstants.KEY_CAN_DELEGATE),
+        assertThat("Delegation is allowed",
+                mBundleCaptor.getValue().getBoolean(HttpNegotiateConstants.KEY_CAN_DELEGATE),
                 equalTo(true));
         assertThat("getAuthTokenByFeatures was called with a callback",
-                sInvocation.mCallbackReceived, notNullValue());
-        assertThat("getAuthTokenByFeatures was called with a handler", sInvocation.mHandlerReceived,
-                notNullValue());
+                mBundleCallbackCaptor.getValue(), notNullValue());
+    }
+
+    /**
+     * Test of {@link HttpNegotiateAuthenticator#getNextAuthToken} without a visible activity.
+     * This emulates the behavior with WebView, where the application is a generic one and doesn't
+     * set up the ApplicationStatus the same way.
+     */
+    @Test
+    @Config(application = Application.class)
+    public void testGetNextAuthTokenWithoutActivity() {
+        final String accountType = "Dummy_Account";
+        final Account[] returnedAccount = {new Account("name", accountType)};
+        HttpNegotiateAuthenticator authenticator = createWithoutNative(accountType);
+
+        authenticator.getNextAuthToken(1234, "test_principal", "", true);
+
+        Assert.assertNull(ApplicationStatus.getLastTrackedFocusedActivity());
+        verify(sMockAccountManager).getAccountsByTypeAndFeatures(
+                eq(accountType),
+                eq(new String[]{"SPNEGO"}),
+                mAccountCallbackCaptor.capture(),
+                any(Handler.class));
+
+        mAccountCallbackCaptor.getValue().run(makeFuture(returnedAccount));
+
+        verify(sMockAccountManager).getAuthToken(
+                any(Account.class),
+                eq("SPNEGO:HOSTBASED:test_principal"),
+                mBundleCaptor.capture(),
+                eq(true),
+                any(HttpNegotiateAuthenticator.GetTokenCallback.class),
+                any(Handler.class));
+
+        assertThat("There is no existing context",
+                mBundleCaptor.getValue().get(HttpNegotiateConstants.KEY_SPNEGO_CONTEXT),
+                nullValue());
+        assertThat("The existing token is empty",
+                mBundleCaptor.getValue().getString(HttpNegotiateConstants.KEY_INCOMING_AUTH_TOKEN),
+                equalTo(""));
+        assertThat("Delegation is allowed",
+                mBundleCaptor.getValue().getBoolean(HttpNegotiateConstants.KEY_CAN_DELEGATE),
+                equalTo(true));
+    }
+
+    /** Tests the behavior of {@link HttpNegotiateAuthenticator.GetAccountsCallback} */
+    @Test
+    public void testGetAccountCallback() {
+        String type = "Dummy_Account";
+        HttpNegotiateAuthenticator authenticator = createWithoutNative(type);
+        RequestData requestData = new RequestData();
+        requestData.nativeResultObject = 42;
+        requestData.accountManager = sMockAccountManager;
+        GetAccountsCallback callback = authenticator.new GetAccountsCallback(requestData);
+
+        // Should fail because there are no accounts
+        callback.run(makeFuture(new Account[]{}));
+        verify(authenticator).nativeSetResult(
+                eq(42L),
+                eq(NetError.ERR_UNEXPECTED),
+                isNull(String.class));
+
+        // Should succeed, for a single account we use it for the AccountManager#getAuthToken call.
+        Account testAccount = new Account("a", type);
+        callback.run(makeFuture(new Account[]{testAccount}));
+        verify(sMockAccountManager).getAuthToken(
+                eq(testAccount),
+                anyString(),
+                any(Bundle.class),
+                eq(true),
+                any(HttpNegotiateAuthenticator.GetTokenCallback.class),
+                any(Handler.class));
+
+        // Should fail because there is more than one account
+        callback.run(makeFuture(new Account[]{new Account("a", type), new Account("b", type)}));
+        verify(authenticator, times(2)).nativeSetResult(
+                eq(42L),
+                eq(NetError.ERR_UNEXPECTED),
+                isNull(String.class));
+    }
+
+    /**
+     * Tests the behavior of {@link HttpNegotiateAuthenticator.GetTokenCallback} when the result it
+     * receives contains an intent rather than a token directly.
+     */
+    @Test
+    public void testGetTokenCallbackWithIntent() {
+        String type = "Dummy_Account";
+        HttpNegotiateAuthenticator authenticator = createWithoutNative(type);
+        RequestData requestData = new RequestData();
+        requestData.nativeResultObject = 42;
+        requestData.authTokenType = "foo";
+        requestData.account = new Account("a", type);
+        requestData.accountManager = sMockAccountManager;
+        Bundle b = new Bundle();
+        b.putParcelable(AccountManager.KEY_INTENT, new Intent());
+
+        authenticator.new GetTokenCallback(requestData).run(makeFuture(b));
+        verifyZeroInteractions(sMockAccountManager);
+
+        // Verify that the broadcast receiver is registered
+        Intent intent = new Intent(AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION);
+        ShadowApplication shadowApplication = Robolectric.getShadowApplication();
+        List<BroadcastReceiver> receivers = shadowApplication.getReceiversForIntent(intent);
+        assertThat("There is one registered broadcast receiver", receivers.size(), equalTo(1));
+
+        // Send the intent to the receiver.
+        BroadcastReceiver receiver = receivers.get(0);
+        receiver.onReceive(Robolectric.getShadowApplication().getApplicationContext(), intent);
+
+        // Verify that the auth token is properly requested from the account manager.
+        verify(sMockAccountManager).getAuthToken(
+                eq(new Account("a", type)),
+                eq("foo"),
+                isNull(Bundle.class),
+                eq(true),
+                any(HttpNegotiateAuthenticator.GetTokenCallback.class),
+                any(Handler.class));
     }
 
     /**
@@ -146,105 +258,184 @@ public void testGetNextAuthToken() {
      */
     @Test
     public void testAccountManagerCallbackRun() {
-        // Spy on the authenticator so that we can override and intercept the native method call.
-        HttpNegotiateAuthenticator authenticator =
-                spy(HttpNegotiateAuthenticator.create("Dummy_Account"));
-        doNothing().when(authenticator).nativeSetResult(anyLong(), anyInt(), anyString());
+        HttpNegotiateAuthenticator authenticator = createWithoutNative("Dummy_Account");
 
         Robolectric.buildActivity(Activity.class).create().start().resume().visible();
 
         // Call getNextAuthToken to get the callback
         authenticator.getNextAuthToken(1234, "test_principal", "", true);
+        verify(sMockAccountManager)
+                .getAuthTokenByFeatures(anyString(), anyString(), any(String[].class),
+                        any(Activity.class), any(Bundle.class), any(Bundle.class),
+                        mBundleCallbackCaptor.capture(), any(Handler.class));
 
-        // Avoid warning when creating mock accountManagerFuture, can't take .class of an
-        // instantiated generic type, yet compiler complains if I leave it uninstantiated.
-        @SuppressWarnings("unchecked")
-        AccountManagerFuture<Bundle> accountManagerFuture = mock(AccountManagerFuture.class);
         Bundle resultBundle = new Bundle();
         Bundle context = new Bundle();
         context.putString("String", "test_context");
         resultBundle.putInt(HttpNegotiateConstants.KEY_SPNEGO_RESULT, HttpNegotiateConstants.OK);
         resultBundle.putBundle(HttpNegotiateConstants.KEY_SPNEGO_CONTEXT, context);
         resultBundle.putString(AccountManager.KEY_AUTHTOKEN, "output_token");
-        try {
-            when(accountManagerFuture.getResult()).thenReturn(resultBundle);
-        } catch (OperationCanceledException | AuthenticatorException | IOException e) {
-            // Can never happen - artifact of Mockito.
-            fail();
-        }
-        sInvocation.mCallbackReceived.run(accountManagerFuture);
+        mBundleCallbackCaptor.getValue().run(makeFuture(resultBundle));
         verify(authenticator).nativeSetResult(1234, 0, "output_token");
 
         // Check that the next call to getNextAuthToken uses the correct context
         authenticator.getNextAuthToken(5678, "test_principal", "", true);
+        verify(sMockAccountManager, times(2))
+                .getAuthTokenByFeatures(anyString(), anyString(), any(String[].class),
+                        any(Activity.class), any(Bundle.class), mBundleCaptor.capture(),
+                        mBundleCallbackCaptor.capture(), any(Handler.class));
+
         assertThat("The spnego context is preserved between calls",
-                sInvocation.mAuthTokenOptionsReceived.getBundle(
-                        HttpNegotiateConstants.KEY_SPNEGO_CONTEXT),
+                mBundleCaptor.getValue().getBundle(HttpNegotiateConstants.KEY_SPNEGO_CONTEXT),
                 equalTo(context));
 
         // Test exception path
-        try {
-            when(accountManagerFuture.getResult()).thenThrow(new OperationCanceledException());
-        } catch (OperationCanceledException | AuthenticatorException | IOException e) {
-            // Can never happen - artifact of Mockito.
-            fail();
-        }
-        sInvocation.mCallbackReceived.run(accountManagerFuture);
-        verify(authenticator).nativeSetResult(5678, NetError.ERR_ABORTED, null);
+        mBundleCallbackCaptor.getValue().run(
+                this.<Bundle>makeFuture(new OperationCanceledException()));
+        verify(authenticator).nativeSetResult(5678, NetError.ERR_UNEXPECTED, null);
     }
 
-    private void checkErrorReturn(Integer spnegoError, int expectedError) {
-        // Spy on the authenticator so that we can override and intercept the native method call.
-        HttpNegotiateAuthenticator authenticator =
-                spy(HttpNegotiateAuthenticator.create("Dummy_Account"));
-        doNothing().when(authenticator).nativeSetResult(anyLong(), anyInt(), anyString());
-
+    @Test
+    public void testAccountManagerCallbackNullErrorReturns() {
         Robolectric.buildActivity(Activity.class).create().start().resume().visible();
-
-        // Call getNextAuthToken to get the callback
-        authenticator.getNextAuthToken(1234, "test_principal", "", true);
-
-        // Avoid warning when creating mock accountManagerFuture, can't take .class of an
-        // instantiated generic type, yet compiler complains if I leave it uninstantiated.
-        @SuppressWarnings("unchecked")
-        AccountManagerFuture<Bundle> accountManagerFuture = mock(AccountManagerFuture.class);
-        Bundle resultBundle = new Bundle();
-        if (spnegoError != null) {
-            resultBundle.putInt(HttpNegotiateConstants.KEY_SPNEGO_RESULT, spnegoError);
-        }
-        try {
-            when(accountManagerFuture.getResult()).thenReturn(resultBundle);
-        } catch (OperationCanceledException | AuthenticatorException | IOException e) {
-            // Can never happen - artifact of Mockito.
-            fail();
-        }
-        sInvocation.mCallbackReceived.run(accountManagerFuture);
-        verify(authenticator).nativeSetResult(anyLong(), eq(expectedError), anyString());
+        checkErrorReturn(null, NetError.ERR_UNEXPECTED);
     }
 
-    /**
-     * Test of callback error returns when getting the auth token completes.
-     */
     @Test
-    public void testAccountManagerCallbackErrorReturns() {

[dgn, 2015/10/30 12:35:39]

Split to reset the state of the mocks between tests.

-        checkErrorReturn(null, NetError.ERR_UNEXPECTED);
+    public void testAccountManagerCallbackUnexpectedErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_UNEXPECTED, NetError.ERR_UNEXPECTED);
+    }
+
+    @Test
+    public void testAccountManagerCallbackAbortedErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_ABORTED, NetError.ERR_ABORTED);
+    }
+
+    @Test
+    public void testAccountManagerCallbackSecLibErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_UNEXPECTED_SECURITY_LIBRARY_STATUS,
                 NetError.ERR_UNEXPECTED_SECURITY_LIBRARY_STATUS);
+    }
+
+    @Test
+    public void testAccountManagerCallbackInvalidResponseErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(
                 HttpNegotiateConstants.ERR_INVALID_RESPONSE, NetError.ERR_INVALID_RESPONSE);
+    }
+
+    @Test
+    public void testAccountManagerCallbackInvalidAuthCredsErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_INVALID_AUTH_CREDENTIALS,
                 NetError.ERR_INVALID_AUTH_CREDENTIALS);
+    }
+
+    @Test
+    public void testAccountManagerCallbackUnsuppAutchSchemeErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_UNSUPPORTED_AUTH_SCHEME,
                 NetError.ERR_UNSUPPORTED_AUTH_SCHEME);
+    }
+
+    @Test
+    public void testAccountManagerCallbackMissingAuthCredsErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_MISSING_AUTH_CREDENTIALS,
                 NetError.ERR_MISSING_AUTH_CREDENTIALS);
+    }
+
+    @Test
+    public void testAccountManagerCallbackUndocSecLibErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(HttpNegotiateConstants.ERR_UNDOCUMENTED_SECURITY_LIBRARY_STATUS,
                 NetError.ERR_UNDOCUMENTED_SECURITY_LIBRARY_STATUS);
+    }
+
+    @Test
+    public void testAccountManagerCallbackMalformedIdentityErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         checkErrorReturn(
                 HttpNegotiateConstants.ERR_MALFORMED_IDENTITY, NetError.ERR_MALFORMED_IDENTITY);
+    }
+
+    @Test
+    public void testAccountManagerCallbackInvalidErrorReturns() {
+        Robolectric.buildActivity(Activity.class).create().start().resume().visible();
         // 9999 is not a valid return value
         checkErrorReturn(9999, NetError.ERR_UNEXPECTED);
     }
+
+    private void checkErrorReturn(Integer spnegoError, int expectedError) {
+        HttpNegotiateAuthenticator authenticator = createWithoutNative("Dummy_Account");
+
+        // Call getNextAuthToken to get the callback
+        authenticator.getNextAuthToken(1234, "test_principal", "", true);
+        verify(sMockAccountManager).getAuthTokenByFeatures(
+                anyString(),
+                anyString(),
+                any(String[].class),
+                any(Activity.class),
+                any(Bundle.class),
+                any(Bundle.class),
+                mBundleCallbackCaptor.capture(),
+                any(Handler.class));
+
+        Bundle resultBundle = new Bundle();
+        if (spnegoError != null) {
+            resultBundle.putInt(HttpNegotiateConstants.KEY_SPNEGO_RESULT, spnegoError);
+        }
+        mBundleCallbackCaptor.getValue().run(makeFuture(resultBundle));
+        verify(authenticator).nativeSetResult(anyLong(), eq(expectedError), anyString());
+    }
+
+    /**
+     * Returns a future that successfully returns the provided result.
+     * Hides mocking related annoyances: compiler warnings and irrelevant catch clauses.
+     */
+    private <T> AccountManagerFuture<T> makeFuture(T result) {
+        // Avoid warning when creating mock accountManagerFuture, can't take .class of an
+        // instantiated generic type, yet compiler complains if I leave it uninstantiated.
+        @SuppressWarnings("unchecked")
+        AccountManagerFuture<T> accountManagerFuture = mock(AccountManagerFuture.class);
+        try {
+            when(accountManagerFuture.getResult()).thenReturn(result);
+        } catch (OperationCanceledException | AuthenticatorException | IOException e) {
+            // Can never happen - artifact of Mockito.
+            fail();
+        }
+        return accountManagerFuture;
+    }
+
+    /**
+     * Returns a future that fails with the provided exception when trying to get its result.
+     * Hides mocking related annoyances: compiler warnings and irrelevant catch clauses.
+     */
+    private <T> AccountManagerFuture<T> makeFuture(Exception ex) {
+        // Avoid warning when creating mock accountManagerFuture, can't take .class of an
+        // instantiated generic type, yet compiler complains if I leave it uninstantiated.
+        @SuppressWarnings("unchecked")
+        AccountManagerFuture<T> accountManagerFuture = mock(AccountManagerFuture.class);
+        try {
+            when(accountManagerFuture.getResult()).thenThrow(ex);
+        } catch (OperationCanceledException | AuthenticatorException | IOException e) {
+            // Can never happen - artifact of Mockito.
+            fail();
+        }
+        return accountManagerFuture;
+    }
+
+    /**
+     * Returns a new authenticator as a spy so that we can override and intercept the native method
+     * calls.
+     */
+    private HttpNegotiateAuthenticator createWithoutNative(String accountType) {
+        HttpNegotiateAuthenticator authenticator =
+                spy(HttpNegotiateAuthenticator.create(accountType));
+        doNothing().when(authenticator).nativeSetResult(anyLong(), anyInt(), anyString());
+        return authenticator;
+    }
 }