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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 
     18 package android.fragment.cts;
     19 
     20 import android.app.FragmentManager;
     21 import android.support.test.rule.ActivityTestRule;
     22 import android.support.test.runner.AndroidJUnit4;
     23 import android.test.suitebuilder.annotation.MediumTest;
     24 import org.junit.Rule;
     25 import org.junit.Test;
     26 import org.junit.runner.RunWith;
     27 
     28 import static android.fragment.cts.FragmentTestUtil.executePendingTransactions;
     29 import static android.fragment.cts.FragmentTestUtil.popBackStackImmediate;
     30 import static junit.framework.TestCase.*;
     31 
     32 @MediumTest
     33 @RunWith(AndroidJUnit4.class)
     34 public class PrimaryNavFragmentTest {
     35     @Rule
     36     public ActivityTestRule<FragmentTestActivity> mActivityRule =
     37             new ActivityTestRule<>(FragmentTestActivity.class);
     38 
     39     @Test
     40     public void delegateBackToPrimaryNav() throws Throwable {
     41         final FragmentManager fm = mActivityRule.getActivity().getFragmentManager();
     42         final StrictFragment strictFragment = new StrictFragment();
     43 
     44         fm.beginTransaction().add(strictFragment, null).setPrimaryNavigationFragment(strictFragment)
     45                 .commit();
     46         executePendingTransactions(mActivityRule, fm);
     47 
     48         assertSame("new fragment is not primary nav fragment", strictFragment,
     49                 fm.getPrimaryNavigationFragment());
     50 
     51         final StrictFragment child = new StrictFragment();
     52         FragmentManager cfm = strictFragment.getChildFragmentManager();
     53         cfm.beginTransaction().add(child, null).addToBackStack(null).commit();
     54         executePendingTransactions(mActivityRule, cfm);
     55 
     56         assertEquals("child transaction not on back stack", 1, cfm.getBackStackEntryCount());
     57 
     58         // Should execute the pop for the child fragmentmanager
     59         assertTrue("popBackStackImmediate returned no action performed",
     60                 popBackStackImmediate(mActivityRule, fm));
     61 
     62         assertEquals("child transaction still on back stack", 0, cfm.getBackStackEntryCount());
     63     }
     64 
     65     @Test
     66     public void popPrimaryNav() throws Throwable {
     67         final FragmentManager fm = mActivityRule.getActivity().getFragmentManager();
     68         final StrictFragment strictFragment1 = new StrictFragment();
     69 
     70         fm.beginTransaction().add(strictFragment1, null)
     71                 .setPrimaryNavigationFragment(strictFragment1)
     72                 .commit();
     73         executePendingTransactions(mActivityRule, fm);
     74 
     75         assertSame("new fragment is not primary nav fragment", strictFragment1,
     76                 fm.getPrimaryNavigationFragment());
     77 
     78         fm.beginTransaction().remove(strictFragment1).addToBackStack(null).commit();
     79         executePendingTransactions(mActivityRule, fm);
     80 
     81         assertNull("primary nav fragment is not null after remove",
     82                 fm.getPrimaryNavigationFragment());
     83 
     84         popBackStackImmediate(mActivityRule, fm);
     85 
     86         assertSame("primary nav fragment was not restored on pop", strictFragment1,
     87                 fm.getPrimaryNavigationFragment());
     88 
     89         final StrictFragment strictFragment2 = new StrictFragment();
     90         fm.beginTransaction().remove(strictFragment1).add(strictFragment2, null)
     91                 .setPrimaryNavigationFragment(strictFragment2).addToBackStack(null).commit();
     92         executePendingTransactions(mActivityRule, fm);
     93 
     94         assertSame("primary nav fragment not updated to new fragment", strictFragment2,
     95                 fm.getPrimaryNavigationFragment());
     96 
     97         popBackStackImmediate(mActivityRule, fm);
     98 
     99         assertSame("primary nav fragment not restored on pop", strictFragment1,
    100                 fm.getPrimaryNavigationFragment());
    101 
    102         fm.beginTransaction().setPrimaryNavigationFragment(strictFragment1)
    103                 .addToBackStack(null).commit();
    104         executePendingTransactions(mActivityRule, fm);
    105 
    106         assertSame("primary nav fragment not retained when set again in new transaction",
    107                 strictFragment1, fm.getPrimaryNavigationFragment());
    108         popBackStackImmediate(mActivityRule, fm);
    109 
    110         assertSame("same primary nav fragment not retained when set primary nav transaction popped",
    111                 strictFragment1, fm.getPrimaryNavigationFragment());
    112     }
    113 
    114     @Test
    115     public void replacePrimaryNav() throws Throwable {
    116         final FragmentManager fm = mActivityRule.getActivity().getFragmentManager();
    117         final StrictFragment strictFragment1 = new StrictFragment();
    118 
    119         fm.beginTransaction().add(android.R.id.content, strictFragment1)
    120                 .setPrimaryNavigationFragment(strictFragment1).commit();
    121         executePendingTransactions(mActivityRule, fm);
    122 
    123         assertSame("new fragment is not primary nav fragment", strictFragment1,
    124                 fm.getPrimaryNavigationFragment());
    125 
    126         final StrictFragment strictFragment2 = new StrictFragment();
    127         fm.beginTransaction().replace(android.R.id.content, strictFragment2)
    128                 .addToBackStack(null).commit();
    129 
    130         executePendingTransactions(mActivityRule, fm);
    131 
    132         assertNull("primary nav fragment not null after replace",
    133                 fm.getPrimaryNavigationFragment());
    134 
    135         popBackStackImmediate(mActivityRule, fm);
    136 
    137         assertSame("primary nav fragment not restored after popping replace", strictFragment1,
    138                 fm.getPrimaryNavigationFragment());
    139 
    140         fm.beginTransaction().setPrimaryNavigationFragment(null).commit();
    141         executePendingTransactions(mActivityRule, fm);
    142 
    143         assertNull("primary nav fragment not null after explicit set to null",
    144                 fm.getPrimaryNavigationFragment());
    145 
    146         fm.beginTransaction().replace(android.R.id.content, strictFragment2)
    147                 .setPrimaryNavigationFragment(strictFragment2).addToBackStack(null).commit();
    148         executePendingTransactions(mActivityRule, fm);
    149 
    150         assertSame("primary nav fragment not set correctly after replace", strictFragment2,
    151                 fm.getPrimaryNavigationFragment());
    152 
    153         popBackStackImmediate(mActivityRule, fm);
    154 
    155         assertNull("primary nav fragment not null after popping replace",
    156                 fm.getPrimaryNavigationFragment());
    157     }
    158 }
    159