content: /*
   * Copyright (C) 2014 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 androidx.test.espresso.assertion;
  
  import static androidx.test.core.app.ApplicationProvider.getApplicationContext;
  import static androidx.test.espresso.assertion.ViewAssertions.matches;
  import static androidx.test.espresso.assertion.ViewAssertions.selectedDescendantsMatch;
  import static androidx.test.espresso.matcher.ViewMatchers.hasContentDescription;
  import static androidx.test.espresso.matcher.ViewMatchers.isAssignableFrom;
  import static androidx.test.espresso.matcher.ViewMatchers.withText;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.not;
  import static org.hamcrest.Matchers.nullValue;
  import static org.junit.rules.ExpectedException.none;
  
  import android.content.Context;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.RelativeLayout;
  import android.widget.ScrollView;
  import android.widget.TextView;
  import androidx.test.espresso.NoMatchingViewException;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import androidx.test.filters.MediumTest;
  import junit.framework.AssertionFailedError;
  import org.hamcrest.Matcher;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  
  /** Unit tests for {@link ViewAssertions}. */
  @MediumTest
  @RunWith(AndroidJUnit4.class)
  public class ViewAssertionsTest {
  
    @Rule public ExpectedException expectedException = none();
  
    private View presentView;
    private View absentView;
    private NoMatchingViewException absentException;
    private NoMatchingViewException presentException;
    private Matcher<View> alwaysAccepts;
    private Matcher<View> alwaysFails;
    private Matcher<View> nullViewMatcher;
    private Context mTargetContext;
  
    @Before
    public void setUp() throws Exception {
      mTargetContext = getApplicationContext();
      presentView = new View(mTargetContext);
      absentView = null;
      absentException = null;
      alwaysAccepts = is(presentView);
      alwaysFails = not(is(presentView));
      nullViewMatcher = nullValue(View.class);
  
      presentException =
          new NoMatchingViewException.Builder()
              .withViewMatcher(alwaysFails)
              .withRootView(new View(mTargetContext))
              .build();
    }
  
    @Test
    public void viewPresent_MatcherFail() {
      expectedException.expect(AssertionFailedError.class);
      matches(alwaysFails).check(presentView, absentException);
    }
  
    @Test
    public void viewPresent_MatcherPass() {
      matches(alwaysAccepts).check(presentView, absentException);
    }
  
    @Test
    public void viewAbsent_Unexpectedly() {
      expectedException.expect(NoMatchingViewException.class);
      matches(alwaysAccepts).check(absentView, presentException);
    }
  
    @Test
    public void viewAbsent_AndThatsWhatIWant() {
      expectedException.expect(NoMatchingViewException.class);
      matches(nullViewMatcher).check(absentView, presentException);
    }
  
    @Test
    public void selectedDescendantsMatch_ThereAreNone() {
      View grany = setUpViewHierarchy();
      selectedDescendantsMatch(withText("welfjkw"), hasContentDescription())
          .check(grany, absentException);
    }
  
    @Test
    public void selectedDescendantsMatch_SelectedDescendantsMatch() {
      View grany = setUpViewHierarchy();
      selectedDescendantsMatch(withText("has content description"), hasContentDescription())
          .check(grany, absentException);
    }
  
    @Test
    public void selectedDescendantsMatch_SelectedDescendantsDoNotMatch() {
      View grany = setUpViewHierarchy();
      expectedException.expect(AssertionFailedError.class);
      selectedDescendantsMatch(withText("no content description"), hasContentDescription())
          .check(grany, absentException);
    }
  
    @Test
    public void selectedDescendantsMatch_SelectedDescendantsMatchAndDoNotMatch() {
      View grany = setUpViewHierarchy();
      expectedException.expect(AssertionFailedError.class);
      selectedDescendantsMatch(isAssignableFrom(TextView.class), hasContentDescription())
          .check(grany, absentException);
    }
  
    private View setUpViewHierarchy() {
      TextView v1 = new TextView(mTargetContext);
      v1.setText("no content description");
      TextView v2 = new TextView(mTargetContext);
      v2.setText("has content description");
      v2.setContentDescription("content description");
      ViewGroup parent = new RelativeLayout(mTargetContext);
      View grany = new ScrollView(mTargetContext);
      ((ViewGroup) grany).addView(parent);
      parent.addView(v1);
      parent.addView(v2);
  
      return grany;
    }
  }
  