| /* |
| * Copyright (C) 2016 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 android.fragment.cts; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import android.app.FragmentManager; |
| import android.view.ViewGroup; |
| |
| import androidx.test.filters.MediumTest; |
| import androidx.test.rule.ActivityTestRule; |
| import androidx.test.runner.AndroidJUnit4; |
| |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| @MediumTest |
| @RunWith(AndroidJUnit4.class) |
| public class FragmentReorderingTest { |
| @Rule |
| public ActivityTestRule<FragmentTestActivity> mActivityRule = |
| new ActivityTestRule<FragmentTestActivity>(FragmentTestActivity.class); |
| |
| private ViewGroup mContainer; |
| private FragmentManager mFM; |
| |
| @Before |
| public void setup() { |
| FragmentTestUtil.setContentView(mActivityRule, R.layout.simple_container); |
| mContainer = (ViewGroup) mActivityRule.getActivity().findViewById(R.id.fragmentContainer); |
| mFM = mActivityRule.getActivity().getFragmentManager(); |
| } |
| |
| // Test that when you add and replace a fragment that only the replace's add |
| // actually creates a View. |
| @Test |
| public void addReplace() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| final StrictViewFragment fragment2 = new StrictViewFragment(); |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().add(R.id.fragmentContainer, fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction() |
| .replace(R.id.fragmentContainer, fragment2) |
| .addToBackStack(null) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| assertEquals(0, fragment1.onCreateViewCount); |
| FragmentTestUtil.assertChildren(mContainer, fragment2); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.popBackStack(); |
| mFM.popBackStack(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer); |
| } |
| |
| // Test that it is possible to merge a transaction that starts with pop and adds |
| // the same view back again. |
| @Test |
| public void startWithPop() throws Throwable { |
| // Start with a single fragment on the back stack |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| mFM.beginTransaction().add(R.id.fragmentContainer, fragment1).addToBackStack(null).commit(); |
| |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| // Now pop and add |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.popBackStack(); |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| assertEquals(1, fragment1.onCreateViewCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer); |
| assertEquals(1, fragment1.onCreateViewCount); |
| } |
| |
| // Popping the back stack in the middle of other operations doesn't fool it. |
| @Test |
| public void middlePop() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| final CountCallsFragment fragment2 = new CountCallsFragment(); |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.popBackStack(); |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment2) |
| .addToBackStack(null) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer, fragment2); |
| assertEquals(0, fragment1.onAttachCount); |
| assertEquals(1, fragment2.onCreateViewCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer); |
| assertEquals(1, fragment2.onDetachCount); |
| } |
| |
| // ensure that removing a view after adding it is optimized into no |
| // View being created. Hide still gets notified. |
| @Test |
| public void removeRedundantRemove() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| final int[] id = new int[1]; |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| id[0] = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().remove(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer); |
| assertEquals(0, fragment1.onCreateViewCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(0, fragment1.onDetachCount); |
| assertEquals(1, fragment1.onAttachCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id[0], |
| FragmentManager.POP_BACK_STACK_INCLUSIVE); |
| FragmentTestUtil.assertChildren(mContainer); |
| assertEquals(0, fragment1.onCreateViewCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertEquals(1, fragment1.onShowCount); |
| assertEquals(1, fragment1.onDetachCount); |
| assertEquals(1, fragment1.onAttachCount); |
| } |
| |
| // Ensure that removing and adding the same view results in no operation |
| @Test |
| public void removeRedundantAdd() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| assertEquals(1, fragment1.onCreateViewCount); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .remove(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| // should be optimized out |
| assertEquals(1, fragment1.onCreateViewCount); |
| |
| mFM.popBackStack(id, 0); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| // optimize out going back, too |
| assertEquals(1, fragment1.onCreateViewCount); |
| } |
| |
| // detaching, then attaching results in on change. Hide still functions |
| @Test |
| public void removeRedundantAttach() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| assertEquals(1, fragment1.onAttachCount); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().detach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().attach(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| // can optimize out the detach/attach |
| assertEquals(0, fragment1.onDestroyViewCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onCreateViewCount); |
| assertEquals(1, fragment1.onAttachCount); |
| assertEquals(0, fragment1.onDetachCount); |
| |
| mFM.popBackStack(id, 0); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| // optimized out again, but not the show |
| assertEquals(0, fragment1.onDestroyViewCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertEquals(1, fragment1.onShowCount); |
| assertEquals(1, fragment1.onCreateViewCount); |
| assertEquals(1, fragment1.onAttachCount); |
| assertEquals(0, fragment1.onDetachCount); |
| } |
| |
| // attaching, then detaching shouldn't result in a View being created |
| @Test |
| public void removeRedundantDetach() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .detach(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| |
| // the add detach is not fully optimized out |
| assertEquals(1, fragment1.onAttachCount); |
| assertEquals(0, fragment1.onDetachCount); |
| assertTrue(fragment1.isDetached()); |
| assertEquals(0, fragment1.onCreateViewCount); |
| FragmentTestUtil.assertChildren(mContainer); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().attach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().detach(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| FragmentTestUtil.assertChildren(mContainer); |
| // can optimize out the attach/detach, and the hide call |
| assertEquals(1, fragment1.onAttachCount); |
| assertEquals(0, fragment1.onDetachCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertTrue(fragment1.isHidden()); |
| assertEquals(0, fragment1.onShowCount); |
| |
| mFM.popBackStack(id, 0); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer); |
| |
| // we can optimize out the attach/detach on the way back |
| assertEquals(1, fragment1.onAttachCount); |
| assertEquals(0, fragment1.onDetachCount); |
| assertEquals(1, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| assertFalse(fragment1.isHidden()); |
| } |
| |
| // show, then hide should optimize out |
| @Test |
| public void removeRedundantHide() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .hide(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .show(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .remove(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .hide(fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| // optimize out hide/show |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id, 0); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| // still optimized out |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().show(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| // The show/hide can be optimized out and nothing should change. |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id, 0); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().show(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().detach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().attach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| // the detach/attach should not affect the show/hide, so show/hide should cancel each other |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id, 0); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(1, fragment1.onHideCount); |
| } |
| |
| // hiding and showing the same view should optimize out |
| @Test |
| public void removeRedundantShow() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(0, fragment1.onHideCount); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction().hide(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().detach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().attach(fragment1).addToBackStack(null).commit(); |
| mFM.beginTransaction().show(fragment1).addToBackStack(null).commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| // can optimize out the show/hide |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(0, fragment1.onHideCount); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id, |
| FragmentManager.POP_BACK_STACK_INCLUSIVE); |
| assertEquals(0, fragment1.onShowCount); |
| assertEquals(0, fragment1.onHideCount); |
| } |
| |
| // The View order shouldn't be messed up by reordering -- a view that |
| // is optimized to not remove/add should be in its correct position after |
| // the transaction completes. |
| @Test |
| public void viewOrder() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| int id = mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| FragmentTestUtil.executePendingTransactions(mActivityRule); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| |
| final CountCallsFragment fragment2 = new CountCallsFragment(); |
| |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .replace(R.id.fragmentContainer, fragment2) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer, fragment2, fragment1); |
| |
| FragmentTestUtil.popBackStackImmediate(mActivityRule, id, 0); |
| FragmentTestUtil.assertChildren(mContainer, fragment1); |
| } |
| |
| // Popping an added transaction results in no operation |
| @Test |
| public void addPopBackStack() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.popBackStack(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer); |
| |
| // Was never instantiated because it was popped before anything could happen |
| assertEquals(0, fragment1.onCreateViewCount); |
| } |
| |
| // A non-back-stack transaction doesn't interfere with back stack add/pop |
| // reodering/removing of redundant operations. |
| @Test |
| public void popNonBackStack() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| final CountCallsFragment fragment2 = new CountCallsFragment(); |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .replace(R.id.fragmentContainer, fragment2) |
| .commit(); |
| mFM.popBackStack(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer, fragment2); |
| |
| // It should be optimized with the replace, so no View creation |
| assertEquals(0, fragment1.onCreateViewCount); |
| } |
| |
| // When reordering is disabled, the transaction prior to the disabled reordering |
| // transaction should all be run prior to running the ordered transaction. |
| @Test |
| public void noReordering() throws Throwable { |
| final CountCallsFragment fragment1 = new CountCallsFragment(); |
| final CountCallsFragment fragment2 = new CountCallsFragment(); |
| mActivityRule.runOnUiThread(new Runnable() { |
| @Override |
| public void run() { |
| mFM.beginTransaction() |
| .add(R.id.fragmentContainer, fragment1) |
| .addToBackStack(null) |
| .commit(); |
| mFM.beginTransaction() |
| .replace(R.id.fragmentContainer, fragment2) |
| .addToBackStack(null) |
| .setReorderingAllowed(false) |
| .commit(); |
| mFM.executePendingTransactions(); |
| } |
| }); |
| FragmentTestUtil.assertChildren(mContainer, fragment2); |
| |
| // No reordering, so fragment1 should have created its View |
| assertEquals(1, fragment1.onCreateViewCount); |
| } |
| |
| } |