Refactor Utils.startWithFragment to SubSettingLauncher

- Use the new launcher in AccountTypePrefernce for now. Will migrate the
  rest in follow up CLs.

Change-Id: I67aa49f54b39ecea4ecfdc32ccbd827d21fc79b8
Bug: 73250851
Test: robotest

tests/robotests/src/com/android/settings/core/SubSettingLauncherTest.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2018 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.core;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.content.Intent;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class SubSettingLauncherTest {
+
+    private Context mContext;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+    }
+
+    @Test(expected = IllegalStateException.class)
+    public void cannotReuseLauncher() {
+        final SubSettingLauncher launcher = spy(new SubSettingLauncher(mContext));
+        doNothing().when(launcher).launch(any(Intent.class));
+        launcher.launch();
+        launcher.launch();
+    }
+
+    @Test
+    public void launch_shouldIncludeAllParams() {
+        final ArgumentCaptor<Intent> intentArgumentCaptor = ArgumentCaptor.forClass(Intent.class);
+        final SubSettingLauncher launcher = spy(new SubSettingLauncher(mContext));
+        launcher.setTitle("123")
+                .setDestination(SubSettingLauncherTest.class.getName())
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                .launch();
+        doNothing().when(launcher).launch(any(Intent.class));
+        verify(launcher).launch(intentArgumentCaptor.capture());
+        final Intent intent = intentArgumentCaptor.getValue();
+
+        assertThat(intent.getStringExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_TITLE))
+                .isEqualTo("123");
+        assertThat(intent.getStringExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT))
+                .isEqualTo(SubSettingLauncherTest.class.getName());
+        assertThat(intent.getFlags()).isEqualTo(Intent.FLAG_ACTIVITY_NEW_TASK);
+    }
+}