Gray out the "Remove account" button when there's a restriction

Fix: 243011338
Fix: 288887119
Test: robotest, manual
Change-Id: Ie3d6607f69a5e7c66bb750febc4d526d6d209ac6

tests/robotests/src/com/android/settings/widget/RestrictedButtonTest.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.widget;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.os.UserManager.EnforcingUser;
+import android.view.View.OnClickListener;
+
+import androidx.fragment.app.FragmentActivity;
+
+import com.android.settings.testutils.shadow.ShadowDevicePolicyManager;
+import com.android.settings.testutils.shadow.ShadowUserManager;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = {ShadowUserManager.class, ShadowDevicePolicyManager.class})
+public class RestrictedButtonTest {
+
+    private RestrictedButton mButton;
+    private OnClickListener mOnClickListener;
+    private UserHandle mUser;
+
+    @Before
+    public void setUp() {
+        mButton = new RestrictedButton(Robolectric.setupActivity(FragmentActivity.class));
+        mOnClickListener = mock(OnClickListener.class);
+        mButton.setOnClickListener(mOnClickListener);
+
+        int userId = UserHandle.myUserId();
+        mUser = UserHandle.of(userId);
+        List<EnforcingUser> enforcingUsers = new ArrayList<>();
+        enforcingUsers.add(new EnforcingUser(userId, UserManager.RESTRICTION_SOURCE_DEVICE_OWNER));
+        // Ensure that RestrictedLockUtils.checkIfRestrictionEnforced doesn't return null.
+        ShadowUserManager.getShadow().setUserRestrictionSources(
+                UserManager.DISALLOW_MODIFY_ACCOUNTS,
+                mUser,
+                enforcingUsers);
+    }
+
+    @Test
+    public void performClick_buttonIsNotInited_shouldCallListener() {
+        mButton.performClick();
+
+        verify(mOnClickListener).onClick(eq(mButton));
+    }
+
+    @Test
+    public void performClick_noRestriction_shouldCallListener() {
+        mButton.init(mUser, UserManager.DISALLOW_ADJUST_VOLUME);
+
+        mButton.performClick();
+
+        verify(mOnClickListener).onClick(eq(mButton));
+    }
+
+    @Test
+    public void performClick_hasRestriction_shouldNotCallListener() {
+        mButton.init(mUser, UserManager.DISALLOW_MODIFY_ACCOUNTS);
+
+        mButton.performClick();
+
+        verify(mOnClickListener, never()).onClick(eq(mButton));
+    }
+
+    @Test
+    public void updateState_noRestriction_shouldEnableButton() {
+        mButton.init(mUser, UserManager.DISALLOW_ADJUST_VOLUME);
+
+        mButton.updateState();
+
+        assertThat(mButton.isEnabled()).isTrue();
+    }
+
+    @Test
+    public void updateState_noRestriction_shoulddisableButton() {
+        mButton.init(mUser, UserManager.DISALLOW_MODIFY_ACCOUNTS);
+
+        mButton.updateState();
+
+        assertThat(mButton.isEnabled()).isFalse();
+    }
+}